防止 Elasticsearch 中出现重复事件型数据的高效方法

link管理

链接快照平台

输入网页链接，自动生成快照
标签化管理网页链接

相关文章推荐

苦恼的白开水 · vb6.0 添加图片缩放显示 - CSDN文库· 1 周前 ·

从容的金针菇 · gdb中如何打印出std::map - ...· 1 周前 ·

酷酷的排球 · module' object has no ...· 1 周前 ·

爱笑的蜡烛 · Importing Tester ...· 1 周前 ·

谦和的牙膏 · module 'numpy' has no ...· 1 周前 ·

不开心的开心果 · Developer Community· 1 月前 ·

温柔的遥控器 · QTreeView 和 ...· 1 月前 ·

温暖的梨子 · 如何查看wsl是wsl1还是wsl2_算法_ ...· 3 月前 ·

慈祥的消防车 · Kindle Paperwhite vs. ...· 3 月前 ·

帅气的企鹅 · 1998哥伦比亚国家队4-4希腊国家队200 ...· 4 月前 ·

</noscript><div id="__next" data-reactroot=""><div class="progress-container"><div class="progress-bar" id="myBar"/></div><div class="skip-links"><style data-emotion="css bivm3i-euiSkipLink-euiScreenReaderOnly">.css-bivm3i-euiSkipLink-euiScreenReaderOnly{-webkit-transition:none!important;transition:none!important;}.css-bivm3i-euiSkipLink-euiScreenReaderOnly:focus{-webkit-animation:none!important;animation:none!important;}.css-bivm3i-euiSkipLink-euiScreenReaderOnly:not(:focus):not(:active):not(:focus-within){inset-block-start:auto;inset-inline-start:-10000px;inline-size:1px;block-size:1px;clip:rect(0 0 0 0);-webkit-clip-path:inset(50%);clip-path:inset(50%);overflow:hidden;margin:-1px;}</style><style data-emotion="css 1ya6sd9-fill-primary-euiSkipLink-euiScreenReaderOnly">.css-1ya6sd9-fill-primary-euiSkipLink-euiScreenReaderOnly{color:#FFF;background-color:#07C;outline-color:#000;-webkit-transition:none!important;transition:none!important;}@media screen and (prefers-reduced-motion: no-preference){.css-1ya6sd9-fill-primary-euiSkipLink-euiScreenReaderOnly{-webkit-transition:-webkit-transform 250ms ease-in-out,background-color 250ms ease-in-out;transition:transform 250ms ease-in-out,background-color 250ms ease-in-out;}.css-1ya6sd9-fill-primary-euiSkipLink-euiScreenReaderOnly:hover:not(:disabled){-webkit-transform:translateY(-1px);-moz-transform:translateY(-1px);-ms-transform:translateY(-1px);transform:translateY(-1px);}.css-1ya6sd9-fill-primary-euiSkipLink-euiScreenReaderOnly:focus{-webkit-animation:euiButtonActive 250ms cubic-bezier(.34, 1.61, .7, 1);animation:euiButtonActive 250ms cubic-bezier(.34, 1.61, .7, 1);}.css-1ya6sd9-fill-primary-euiSkipLink-euiScreenReaderOnly:active:not(:disabled){-webkit-transform:translateY(1px);-moz-transform:translateY(1px);-ms-transform:translateY(1px);transform:translateY(1px);}}.css-1ya6sd9-fill-primary-euiSkipLink-euiScreenReaderOnly:focus{-webkit-animation:none!important;animation:none!important;}.css-1ya6sd9-fill-primary-euiSkipLink-euiScreenReaderOnly:not(:focus):not(:active):not(:focus-within){inset-block-start:auto;inset-inline-start:-10000px;inline-size:1px;block-size:1px;clip:rect(0 0 0 0);-webkit-clip-path:inset(50%);clip-path:inset(50%);overflow:hidden;margin:-1px;}</style><style data-emotion="css 1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly">.css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly{display:inline-block;-webkit-appearance:none;-moz-appearance:none;-ms-appearance:none;appearance:none;cursor:pointer;white-space:nowrap;max-inline-size:100%;vertical-align:middle;font-weight:500;padding:0 12px;block-size:32px;line-height:32px;font-size:1.0000rem;line-height:1.4286rem;min-inline-size:112px;border-radius:4px;color:#FFF;background-color:#07C;outline-color:#000;-webkit-transition:none!important;transition:none!important;}.css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly:hover:not(:disabled),.css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly:focus{-webkit-text-decoration:underline;text-decoration:underline;}@media screen and (prefers-reduced-motion: no-preference){.css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly{-webkit-transition:-webkit-transform 250ms ease-in-out,background-color 250ms ease-in-out;transition:transform 250ms ease-in-out,background-color 250ms ease-in-out;}.css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly:hover:not(:disabled){-webkit-transform:translateY(-1px);-moz-transform:translateY(-1px);-ms-transform:translateY(-1px);transform:translateY(-1px);}.css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly:focus{-webkit-animation:euiButtonActive 250ms cubic-bezier(.34, 1.61, .7, 1);animation:euiButtonActive 250ms cubic-bezier(.34, 1.61, .7, 1);}.css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly:active:not(:disabled){-webkit-transform:translateY(1px);-moz-transform:translateY(1px);-ms-transform:translateY(1px);transform:translateY(1px);}}.css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly:focus{-webkit-animation:none!important;animation:none!important;}.css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly:not(:focus):not(:active):not(:focus-within){inset-block-start:auto;inset-inline-start:-10000px;inline-size:1px;block-size:1px;clip:rect(0 0 0 0);-webkit-clip-path:inset(50%);clip-path:inset(50%);overflow:hidden;margin:-1px;}</style><a href="#main-content" rel="noreferrer" class="euiSkipLink css-1vo6hom-euiButtonDisplay-s-defaultMinWidth-s-fill-primary-euiSkipLink-euiScreenReaderOnly"><style data-emotion="css 1km4ln8-euiButtonDisplayContent">.css-1km4ln8-euiButtonDisplayContent{block-size:100%;inline-size:100%;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;vertical-align:middle;gap:8px;}</style><span class="css-1km4ln8-euiButtonDisplayContent"><span class="eui-textTruncate">Skip to main content</span></span></a></div><header class="primary header-wrapper"><div data-component-theme="light" class="Index_navigation__kp9_7" id="navigation_container"><div class="Index_navigation_container__AMYLs"><div data-component-theme="light" class="Index_navigation_header__KYvRr"><a href="/cn" class="jsx-1189744782 elastic-logo"><span class="jsx-1189744782 sr-only">Elastic</span><svg width="117" height="40" viewbox="0 0 117 40" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1189744782"><g class="jsx-1189744782"><path d="M40.1527 20.9588C40.1527 17.5986 38.0653 14.6457 34.9257 13.5087C35.0615 12.7959 35.1294 12.0831 35.1294 11.3534C35.1294 5.09121 30.0382 -1.52588e-05 23.793 -1.52588e-05C20.1273 -1.52588e-05 16.7331 1.74797 14.5948 4.70088C13.5426 3.88628 12.2529 3.44505 10.9122 3.44505C7.58591 3.44505 4.88757 6.14339 4.88757 9.46965C4.88757 10.1994 5.02333 10.9122 5.26092 11.574C2.13831 12.6941 0 15.6979 0 19.0411C0 22.4183 2.10437 25.3712 5.24395 26.5083C5.10819 27.2041 5.0403 27.9338 5.0403 28.6635C5.0403 34.9088 10.1146 39.983 16.3598 39.983C20.0255 39.983 23.4196 38.2181 25.5409 35.2651C26.5931 36.0967 27.8829 36.5549 29.2236 36.5549C32.5498 36.5549 35.2482 33.8566 35.2482 30.5303C35.2482 29.8006 35.1124 29.0878 34.8748 28.4259C37.9974 27.3059 40.1527 24.3021 40.1527 20.9588Z" fill="white" class="jsx-1189744782"/><path d="M15.7824 17.2253L24.5732 21.2304L33.432 13.4578C33.5677 12.8129 33.6186 12.185 33.6186 11.5061C33.6186 6.04156 29.1723 1.59523 23.7077 1.59523C20.4324 1.59523 17.3946 3.20745 15.5448 5.9058L14.0684 13.5596L15.7824 17.2253Z" fill="#FED10A" class="jsx-1189744782"/><path d="M6.68665 26.5253C6.55088 27.1702 6.49997 27.832 6.49997 28.5108C6.49997 33.9924 10.9633 38.4387 16.4448 38.4387C19.7371 38.4387 22.8088 36.8095 24.6587 34.0942L26.1181 26.4744L24.1665 22.7408L15.3417 18.7187L6.68665 26.5253Z" fill="#24BBB1" class="jsx-1189744782"/><path d="M6.63518 11.3195L12.6598 12.745L13.9835 5.90583C13.1689 5.27791 12.1507 4.93849 11.0985 4.93849C8.48499 4.93849 6.34668 7.05983 6.34668 9.69029C6.34668 10.2503 6.4485 10.8104 6.63518 11.3195Z" fill="#EF5098" class="jsx-1189744782"/><path d="M6.10983 12.762C3.42846 13.6444 1.54471 16.224 1.54471 19.0581C1.54471 21.8243 3.25875 24.2851 5.82133 25.2694L14.2728 17.6326L12.7284 14.3233L6.10983 12.762Z" fill="#1BA9F5" class="jsx-1189744782"/><path d="M26.186 34.0942C27.0176 34.7221 28.0189 35.0785 29.0541 35.0785C31.6676 35.0785 33.8059 32.9571 33.8059 30.3267C33.8059 29.7497 33.7041 29.1896 33.5174 28.6805L27.5098 27.2719L26.186 34.0942Z" fill="#93C83E" class="jsx-1189744782"/><path d="M27.4075 25.6937L34.0261 27.238C36.7245 26.3555 38.5912 23.776 38.5912 20.9249C38.5912 18.1757 36.8772 15.6979 34.3146 14.7306L25.6595 22.3165L27.4075 25.6937Z" fill="#0077CC" class="jsx-1189744782"/><path fill-rule="evenodd" clip-rule="evenodd" d="M60.3483 29.8175V9.96179H62.4187V29.8175H60.3483ZM56.1393 28.0865L56.937 28.0017L56.9879 29.6309C54.8835 29.9194 53.0846 30.0721 51.5912 30.0721C49.6056 30.0721 48.197 29.4951 47.3655 28.3411C46.5339 27.1871 46.1266 25.3882 46.1266 22.9614C46.1266 18.1077 48.0613 15.6809 51.9136 15.6809C53.7804 15.6809 55.172 16.207 56.0884 17.2422C57.0048 18.2775 57.463 19.9236 57.463 22.1468L57.3443 23.7251H48.214C48.214 25.2524 48.4855 26.3895 49.0456 27.1192C49.6056 27.8489 50.556 28.2223 51.9306 28.2223C53.3222 28.2562 54.7138 28.2053 56.1393 28.0865ZM55.3926 22.0959C55.3926 20.3988 55.1211 19.1939 54.578 18.4981C54.035 17.8023 53.1525 17.4459 51.9306 17.4459C50.7087 17.4459 49.7753 17.8192 49.1644 18.549C48.5534 19.2787 48.231 20.4667 48.214 22.0959H55.3926ZM75.5031 26.9665V20.1612C75.5031 18.6338 75.1468 17.4968 74.417 16.784C73.7042 16.0543 72.5672 15.6979 71.0059 15.6979H65.6941V17.5307H71.1417C71.8375 17.5307 72.3975 17.7344 72.8048 18.1417C73.2121 18.549 73.4157 19.2278 73.4157 20.1612V21.3491L69.0712 21.7564C67.6117 21.8922 66.5426 22.2995 65.8638 22.9274C65.1849 23.5553 64.8455 24.5566 64.8455 25.8973C64.8455 27.255 65.1849 28.2902 65.8468 29.0029C66.5087 29.7327 67.476 30.0891 68.7488 30.0891C70.4119 30.0891 72.0581 29.7836 73.7212 29.0539C74.3557 29.6588 75.3493 29.648 76.5572 29.6349H76.5574H76.5576H76.5579C76.7391 29.6329 76.925 29.6309 77.1154 29.6309L77.2172 27.798C77.2172 27.798 75.5031 27.6623 75.5031 26.9665ZM69.0882 28.3411C67.6796 28.3411 66.9838 27.4925 66.9838 25.7955C66.9838 25.0318 67.1535 24.4378 67.5269 24.0305C67.9002 23.6232 68.4942 23.3856 69.3258 23.3178L73.4157 22.9274V27.4925L72.7878 27.7132C71.5829 28.1374 70.344 28.3411 69.0882 28.3411ZM83.5982 17.5477C81.5956 17.5477 80.5774 18.2435 80.5774 19.6521C80.5774 20.297 80.815 20.7552 81.2732 21.0267C81.7314 21.2983 82.7836 21.5698 84.4297 21.8583C86.0759 22.1468 87.2299 22.5371 87.9088 23.0632C88.5876 23.5724 88.927 24.5397 88.927 25.9652C88.927 27.3908 88.4688 28.426 87.5524 29.0878C86.6359 29.7497 85.3122 30.0891 83.5473 30.0891C82.4102 30.0891 78.5918 29.6648 78.5918 29.6648L78.7106 27.8659C79.0533 27.8978 79.3815 27.9289 79.6954 27.9586C81.3864 28.1186 82.6624 28.2393 83.5642 28.2393C84.6334 28.2393 85.448 28.0696 86.008 27.7302C86.5681 27.3908 86.8566 26.8138 86.8566 26.0161C86.8566 25.2185 86.619 24.6754 86.1438 24.3869C85.6686 24.0984 84.6164 23.8269 82.9872 23.5724C81.358 23.3178 80.204 22.9444 79.5252 22.4353C78.8463 21.9432 78.5069 21.0098 78.5069 19.6691C78.5069 18.3284 78.9821 17.3271 79.9325 16.6822C80.8828 16.0374 82.0708 15.7149 83.4794 15.7149C84.5994 15.7149 88.5027 16.0034 88.5027 16.0034V17.8193C87.8189 17.7797 87.1764 17.7364 86.5804 17.6962C85.3867 17.6157 84.3792 17.5477 83.5982 17.5477ZM94.5436 17.7853H98.939V15.9694H94.5436V11.7437H92.4901V15.9864H90.5215V17.7853H92.4901V25.0657C92.4901 27.0344 92.7617 28.375 93.3217 29.0708C93.8817 29.7666 94.866 30.123 96.3085 30.123C96.9534 30.123 97.8868 30.0212 99.1257 29.8176L98.9899 28.1035L96.5291 28.2732C95.6636 28.2732 95.1206 28.0187 94.883 27.5265C94.6624 27.0344 94.5436 25.9822 94.5436 24.4039V17.7853ZM101.824 12.8469V10.454H103.895V12.8638L101.824 12.8469ZM101.824 29.8176V15.9864H103.895V29.8176H101.824ZM115.995 16.0373C114.535 15.8167 113.5 15.6979 112.889 15.6979C110.819 15.6979 109.342 16.241 108.443 17.2931C107.56 18.3453 107.119 20.1951 107.119 22.8256C107.119 25.4561 107.543 27.3228 108.358 28.4259C109.172 29.529 110.666 30.0891 112.821 30.0891C113.67 30.0891 114.959 29.9533 116.674 29.6987L116.589 27.9847L113.33 28.2393C111.667 28.2393 110.581 27.8489 110.055 27.0513C109.529 26.2537 109.274 24.8451 109.274 22.8256C109.274 20.8061 109.563 19.4145 110.123 18.6678C110.683 17.9211 111.752 17.5477 113.313 17.5477C114.009 17.5477 115.095 17.6326 116.572 17.8023L116.657 16.1222L115.995 16.0373Z" fill="#000" class="jsx-1189744782 elastic-logo__wordmark"/></g></svg></a><div class="&#10; Actions_actions__9PoiP&#10; &#10; "><div class="Actions_action__THZjm"><button type="button" aria-label="Press down to open menu." aria-expanded="false"><span><svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="none"><g clip-path="url(#a)"><path d="M10 18.75c-1.57 0-3.125-3.89-3.125-8.75 0-4.86 1.556-8.75 3.125-8.75V0C7.428 0 5.625 4.506 5.625 10S7.428 20 10 20v-1.25ZM10 18.75c1.57 0 3.125-3.89 3.125-8.75 0-4.86-1.556-8.75-3.125-8.75V0c2.572 0 4.375 4.506 4.375 10S12.572 20 10 20v-1.25Z"/><path d="M3.125 7.5h13.75V6.25H3.125V7.5ZM3.125 13.75h13.75V12.5H3.125v1.25Z"/><path fill-rule="evenodd" d="M20 10c0 5.523-4.477 10-10 10S0 15.523 0 10 4.477 0 10 0s10 4.477 10 10ZM1.25 10a8.75 8.75 0 1 0 17.5 0 8.75 8.75 0 0 0-17.5 0Z" clip-rule="evenodd"/></g><defs><clippath id="a"><path d="M0 0h20v20H0z"/></clippath></defs></svg></span><span class="Actions_ButtonText__L0fen">CN</span></button><div class="Dropdown_Dropdown__pUJPf Dropdown_Dropdown--modalOnMobile__olFVq"><div class="Dropdown_DropdownContent__tGePQ"><button class="Dropdown_DropdownClose__wx62b" disabled=""><span class="Dropdown_DropdownClose_text__IoOgP">Close panel</span><svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewbox="0 0 16 16" fill="none"><path fill-rule="evenodd" clip-rule="evenodd" d="M6.58586 8.00008L0.292969 14.293L1.70718 15.7072L8.00008 9.41429L14.293 15.7072L15.7072 14.293L9.41429 8.00008L15.7072 1.70718L14.293 0.292969L8.00008 6.58586L1.70718 0.292969L0.292969 1.70718L6.58586 8.00008Z"/></svg></button><div class="Dropdown_DropdownSections__G_B5O"><ul><li class="Actions_DropdownItem__z0FcS"><a class="Actions_DropdownLink__evluL">Deutsch</a></li><li class="Actions_DropdownItem__z0FcS"><a class="Actions_DropdownLink__evluL">English</a></li><li class="Actions_DropdownItem__z0FcS"><a class="Actions_DropdownLink__evluL">Español</a></li><li class="Actions_DropdownItem__z0FcS"><a class="Actions_DropdownLink__evluL">Français</a></li><li class="Actions_DropdownItem__z0FcS"><a class="Actions_DropdownLink__evluL">日本語</a></li><li class="Actions_DropdownItem__z0FcS"><a class="Actions_DropdownLink__evluL">한국어</a></li><li class="Actions_DropdownItem__z0FcS Actions_DropdownItemActive__0GjNS"><a class="Actions_DropdownLink__evluL">简体中文</a></li><li class="Actions_DropdownItem__z0FcS"><a class="Actions_DropdownLink__evluL">Português</a></li></ul></div></div></div></div><div class="Actions_action__THZjm"><button type="button"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="none" class="jsx-3447688935 icon"><g fill-rule="evenodd" stroke-width=".417" clip-path="url(#a)" clip-rule="evenodd" class="jsx-3447688935"><path d="M8.332 1.99a6.346 6.346 0 1 0 0 12.693 6.346 6.346 0 0 0 0-12.693Zm-7.5 6.346a7.5 7.5 0 1 1 15 0 7.5 7.5 0 0 1-15 0Z" class="jsx-3447688935"/><path d="m14.124 13.336 5.041 5.041-.792.792-5.041-5.04.792-.793Z" class="jsx-3447688935"/></g><defs class="jsx-3447688935"><clippath id="a" class="jsx-3447688935"><path d="M0 0h20v20H0z" class="jsx-3447688935"/></clippath></defs></svg><span class="Actions_ButtonText__L0fen Actions_ButtonTextHidden__r8BOX">搜索</span></button></div><div class="Actions_action__THZjm"><a href="https://cloud.elastic.co"><svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="none"><g clip-path="url(#a)"><path fill-rule="evenodd" d="M6.252 5.416a3.75 3.75 0 1 1 7.5 0 3.75 3.75 0 0 1-7.5 0ZM10.002 0a5.417 5.417 0 0 0-3.336 9.685 8.215 8.215 0 0 0-3.384 2.245C1.602 13.782.625 16.5.625 20h1.667c0-3.196.888-5.478 2.225-6.951 1.331-1.469 3.18-2.215 5.275-2.215 2.094 0 3.943.746 5.275 2.215 1.336 1.473 2.225 3.755 2.225 6.951h1.666c0-3.501-.977-6.219-2.657-8.071A8.204 8.204 0 0 0 13.2 9.79 5.417 5.417 0 0 0 10.002 0Z" clip-rule="evenodd"/><path d="M1.668 20.003h16.667v-1.667H1.668v1.667Z"/></g><defs><clippath id="a"><path d="M0 0h20v20H0z"/></clippath></defs></svg><span class="Actions_ButtonText__L0fen Actions_ButtonTextHidden__r8BOX">登录</span></a></div><button type="button" aria-expanded="false" class="&#10; Control_navigation-control__dMg2m&#10; &#10; &#10; &#10; "><span class="Control_navigation-control_text__wyRQe">Toggle Navigation</span><span class="Control_navigation-control_icon__2h1YW"><span/><span/><span/></span></button></div><div class="search-container Actions_search-container__1lhGz"><div class="jsx-506940049 container"/></div><div style="top:72px" class="Buttons_navigationButtons__QJmSA"><a class="button btn-primary btn-small" href="https://cloud.elastic.co/registration"><span class="jsx-1276535992 btn-copy">开始免费试用</span></a><a class="button btn-secondary-inverted btn-small" href="/contact"><span class="jsx-1276535992 btn-copy">联系销售人员</span></a></div><div style="top:72px" class="Index_navigation_flyout__73xqL"><div class="Index_navigation_flyout_content___3G_7"><nav class="Items_navigation-items__lSmFz"><div class="Items_dropdownWrapper__hJFj3" style="width:100%;height:200px"/><div><button class="Items_navigation-items_item__7YSef" aria-label="Platform, press down to open menu." aria-expanded="false">Platform<svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewbox="0 0 16 16"><path fill-rule="evenodd" d="M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z"/></svg></button><div class="Dropdown_Dropdown__pUJPf "><div class="Dropdown_DropdownContent__tGePQ"><button class="Dropdown_DropdownClose__wx62b" disabled=""><span class="Dropdown_DropdownClose_text__IoOgP">Close panel</span><svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewbox="0 0 16 16" fill="none"><path fill-rule="evenodd" clip-rule="evenodd" d="M6.58586 8.00008L0.292969 14.293L1.70718 15.7072L8.00008 9.41429L14.293 15.7072L15.7072 14.293L9.41429 8.00008L15.7072 1.70718L14.293 0.292969L8.00008 6.58586L1.70718 0.292969L0.292969 1.70718L6.58586 8.00008Z"/></svg></button><div class="Dropdown_DropdownSections__G_B5O"><div class="Items_Section__vJ9lm Items_spotlight-feature___wj__"><div class="&#10; Card_nav-card__Gb2bd&#10; Card_ghost-card__kC3tT&#10; &#10; &#10; "><div class="Card_card-header__dLhyK"><a class="Card_custom-link__semnr" href="/platform"><h2 class="h5">Elasticsearch Platform</h2></a><a class="Card_custom-link__semnr" href="/platform"><div class="Card_card-image__34JYo"><div class="&#10; &#10; Card_thumbnail-wrapper__8kCr1&#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt7769ab02e4a7aabf/65e0ef8bd781fef46ae748d0/illustration-nav-elastic-platform-720x420.png" class="Card_img-fluid__EqrlH" alt="APM 日志插图"/></div></div></a><a class="Card_custom-link__semnr" href="/platform"/></div><div class="Card_card-body__81rqO"><div><p>可观测性、安全和搜索等三大解决方案 — 由 Elasticsearch 平台提供支持。</p></div></div><div class="Card_card-footer__OfpS8"><div class="d-flex flex-column"><a class="button Card_dropdown-link__qZWTu Card_dropdown-link__spaced___Q1m0 Card_btn-tertiary__f8UEk btn-tertiary" href="/platform" tabindex="-1"><span class="jsx-1276535992 btn-copy">Elastic 概述</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div></div><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><a class="Card_custom-link__semnr" href="/elastic-stack"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt0090c6239e64faf8/62aa0980c949fd5059e8aebc/logo-stack-32-color.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div></a><a class="Card_custom-link__semnr" href="/elastic-stack"><h2 class="h5">ELK Stack</h2></a><a class="Card_custom-link__semnr" href="/elastic-stack"/><a class="Card_custom-link__semnr" href="/elastic-stack"/></div><div class="Card_card-body__81rqO"><div><p>搜索和分析、数据采集以及可视化，易如反掌</p></div><ul><li><a class="Card_dropdown-link__qZWTu" href="/kibana" tabindex="-1">Kibana<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/elasticsearch" tabindex="-1">Elasticsearch<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/integrations" tabindex="-1">集成<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div><div class="Card_card-footer__OfpS8"><div class="d-flex flex-column"><a class="button Card_dropdown-link__qZWTu Card_dropdown-link__spaced___Q1m0 Card_btn-tertiary__f8UEk btn-tertiary" href="/elastic-stack" tabindex="-1"><span class="jsx-1276535992 btn-copy">ELK Stack 概述</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div></div></div><div class="Items_Section__vJ9lm"><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/bltdb0f38c35ae455dc/5d07f086877575d0584760a3/logo-cloud-24-color.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div><h2 class="h5">Elastic Cloud</h2></div><div class="Card_card-body__81rqO"><div><p>在您首选的云服务提供商平台上利用 Elastic 找到重要答案。</p></div><div class="d-flex flex-column"><a class="button Card_dropdown-link__qZWTu Card_dropdown-link__spaced___Q1m0 Card_btn-tertiary__f8UEk btn-tertiary" href="/cloud" tabindex="-1"><span class="jsx-1276535992 btn-copy">Cloud 概述</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div><hr class="Card_nav-divider__yt_19"/><div class="d-flex flex-column"><a class="button Card_dropdown-link__qZWTu Card_dropdown-link__spaced___Q1m0 Card_btn-tertiary__f8UEk btn-tertiary" href="/partners" tabindex="-1"><span class="jsx-1276535992 btn-copy">合作伙伴</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a><a class="button Card_dropdown-link__qZWTu Card_dropdown-link__spaced___Q1m0 Card_btn-tertiary__f8UEk btn-tertiary" href="/contact?storm=global-header-en" tabindex="-1"><span class="jsx-1276535992 btn-copy">联系销售人员</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div></div></div></div></div></div></div><div><button class="Items_navigation-items_item__7YSef" aria-label="解决方案, press down to open menu." aria-expanded="false">解决方案<svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewbox="0 0 16 16"><path fill-rule="evenodd" d="M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z"/></svg></button><div class="Dropdown_Dropdown__pUJPf "><div class="Dropdown_DropdownContent__tGePQ"><button class="Dropdown_DropdownClose__wx62b" disabled=""><span class="Dropdown_DropdownClose_text__IoOgP">Close panel</span><svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewbox="0 0 16 16" fill="none"><path fill-rule="evenodd" clip-rule="evenodd" d="M6.58586 8.00008L0.292969 14.293L1.70718 15.7072L8.00008 9.41429L14.293 15.7072L15.7072 14.293L9.41429 8.00008L15.7072 1.70718L14.293 0.292969L8.00008 6.58586L1.70718 0.292969L0.292969 1.70718L6.58586 8.00008Z"/></svg></button><div class="Dropdown_DropdownSections__G_B5O"><div class="Items_Section__vJ9lm Items_four-column__XFFHc"><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><a class="Card_custom-link__semnr" href="/observability"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/bltbf6ba0d0e0e1e5ab/5e20f19a2aa8e40a75136318/logo-observability-32-color.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div></a><a class="Card_custom-link__semnr" href="/observability"><h2 class="h5">可观测性</h2></a><a class="Card_custom-link__semnr" href="/observability"/><a class="Card_custom-link__semnr" href="/observability"/></div><div class="Card_card-body__81rqO"><div><p>一体化实现应用和基础架构可见性，主动解决问题。</p></div><ul><li><a class="Card_dropdown-link__qZWTu" href="/observability/log-monitoring" tabindex="-1">日志监测<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/observability/application-performance-monitoring" tabindex="-1">应用程序性能监测<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/observability/infrastructure-monitoring" tabindex="-1">基础架构监测<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/observability/synthetic-monitoring" tabindex="-1">合成监测<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/observability/real-user-monitoring" tabindex="-1">真实用户监测<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/observability/universal-profiling" tabindex="-1">Universal Profiling<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/observability/aiops" tabindex="-1">AIOps<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/observability/opentelemetry" tabindex="-1">OpenTelemetry<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div><div class="Card_card-footer__OfpS8"><div class="d-flex flex-column"><a class="button Card_dropdown-link__qZWTu Card_dropdown-link__spaced___Q1m0 Card_btn-tertiary__f8UEk btn-tertiary" href="/observability" tabindex="-1"><span class="jsx-1276535992 btn-copy">可观测性概述</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div></div><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><a class="Card_custom-link__semnr" href="/security"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/bltf58b7c8e04706979/5e20f1a8132ead1155e8d0a4/logo-security-32-color.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div></a><a class="Card_custom-link__semnr" href="/security"><h2 class="h5">安全性</h2></a><a class="Card_custom-link__semnr" href="/security"/><a class="Card_custom-link__semnr" href="/security"/></div><div class="Card_card-body__81rqO"><div><p>快速、大规模地防范、调查和应对网络威胁。</p></div><ul><li><a class="Card_dropdown-link__qZWTu" href="/security/continuous-monitoring" tabindex="-1">持续监测<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/security/threat-hunting" tabindex="-1">威胁猎捕<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/security/investigation-response" tabindex="-1">调查和事件响应<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/security/automated-threat-protection" tabindex="-1">自动威胁防护<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div><div class="Card_card-footer__OfpS8"><div class="d-flex flex-column"><a class="button Card_dropdown-link__qZWTu Card_dropdown-link__spaced___Q1m0 Card_btn-tertiary__f8UEk btn-tertiary" href="/security" tabindex="-1"><span class="jsx-1276535992 btn-copy">安全性概述</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div></div><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><a class="Card_custom-link__semnr" href="/enterprise-search"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt549f7d977c2a88f4/5d082d34616162aa5a85707d/logo-enterprise-search-32-color.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div></a><a class="Card_custom-link__semnr" href="/enterprise-search"><h2 class="h5">搜索</h2></a><a class="Card_custom-link__semnr" href="/enterprise-search"/><a class="Card_custom-link__semnr" href="/enterprise-search"/></div><div class="Card_card-body__81rqO"><div><p>在任何云中加速搜索结果，并提高个性化程度。</p></div><ul><li><a class="Card_dropdown-link__qZWTu" href="/enterprise-search/generative-ai" tabindex="-1">生成式 AI<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/enterprise-search/search-applications" tabindex="-1">搜索应用程序<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/enterprise-search/ecommerce" tabindex="-1">电子商务<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/enterprise-search/site-search" tabindex="-1">网站<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/enterprise-search/workplace-search" tabindex="-1">Workplace Search<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/enterprise-search/customer-support" tabindex="-1">客户支持<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div><div class="Card_card-footer__OfpS8"><div class="d-flex flex-column"><a class="button Card_dropdown-link__qZWTu Card_dropdown-link__spaced___Q1m0 Card_btn-tertiary__f8UEk btn-tertiary" href="/enterprise-search" tabindex="-1"><span class="jsx-1276535992 btn-copy">搜索概述</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div></div><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><a class="Card_custom-link__semnr" href="/industries"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt9f634b6f74878698/647ccc625637890f19859454/icon-briefcase.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div></a><a class="Card_custom-link__semnr" href="/industries"><h2 class="h5">按行业</h2></a><a class="Card_custom-link__semnr" href="/industries"/></div><div class="Card_card-body__81rqO"><ul><li><a class="Card_dropdown-link__qZWTu" href="/industries/public-sector" tabindex="-1">公共领域<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/industries/financial-services" tabindex="-1">金融服务<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/industries/telecommunications" tabindex="-1">电信<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/industries/healthcare" tabindex="-1">医疗保健<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/industries/technology" tabindex="-1">技术<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/industries/retail-ecommerce" tabindex="-1">零售和电子商务<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/industries/manufacturing" tabindex="-1">制造和汽车<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div><div class="Card_card-footer__OfpS8"><div class="d-flex flex-column"><a class="button Card_dropdown-link__qZWTu Card_dropdown-link__spaced___Q1m0 Card_btn-tertiary__f8UEk btn-tertiary" href="/industries" tabindex="-1"><span class="jsx-1276535992 btn-copy">查看所有行业</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div></div></div></div></div></div></div><div><button class="Items_navigation-items_item__7YSef" aria-label="客户, press down to open menu." aria-expanded="false">客户<svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewbox="0 0 16 16"><path fill-rule="evenodd" d="M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z"/></svg></button><div class="Dropdown_Dropdown__pUJPf "><div class="Dropdown_DropdownContent__tGePQ"><button class="Dropdown_DropdownClose__wx62b" disabled=""><span class="Dropdown_DropdownClose_text__IoOgP">Close panel</span><svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewbox="0 0 16 16" fill="none"><path fill-rule="evenodd" clip-rule="evenodd" d="M6.58586 8.00008L0.292969 14.293L1.70718 15.7072L8.00008 9.41429L14.293 15.7072L15.7072 14.293L9.41429 8.00008L15.7072 1.70718L14.293 0.292969L8.00008 6.58586L1.70718 0.292969L0.292969 1.70718L6.58586 8.00008Z"/></svg></button><div class="Dropdown_DropdownSections__G_B5O"><div class="Items_Section__vJ9lm"><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><a class="Card_custom-link__semnr" href="/customers"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/bltacc5e178e52f430e/647ccc7b6be35fb5eabd2100/icon-checkmark-decorative-border.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div></a><a class="Card_custom-link__semnr" href="/customers"><h2 class="h5">按解决方案</h2></a><a class="Card_custom-link__semnr" href="/customers"/><a class="Card_custom-link__semnr" href="/customers"/></div><div class="Card_card-body__81rqO"><div><p>让客户能够提升速度、灵活扩展并制定下一步的计划。</p></div><ul><li><a class="Card_dropdown-link__qZWTu" href="/customers/success-stories?usecase=elastic-observability&amp;industry=All" tabindex="-1">可观测性<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/customers/success-stories?usecase=security-analytics&amp;industry=All" tabindex="-1">安全性<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/customers/success-stories?usecase=enterprise-search&amp;industry=All" tabindex="-1">搜索<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div><div class="Card_card-footer__OfpS8"><div class=""/></div></div></div><div class="Items_Section__vJ9lm Items_spotlight-feature___wj__"><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; &#10; undefined&#10; "><div class="Card_card-header__dLhyK"><h2 class="Card_topic-heading___KyPp">客户聚焦</h2></div><div><div class="Spotlight_spotlight-card__Qi_WV"><div class="Spotlight_card-image__4S6cS"><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt652fec920f2b1a14/650c1d87aa86c13fa1cc288c/logo-nav-dropdown-48x48-cisco.svg" alt="" class=""/></div><div class="Spotlight_card-body___rb9E"><p>了解 Cisco 如何借助 AI 打造搜索体验</p><a class="button Spotlight_stretched-link__2M98R btn-tertiary" href="/customers/cisco" tabindex="-1"><span class="jsx-1276535992 btn-copy">了解详情</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div><div class="Spotlight_spotlight-card__Qi_WV"><div class="Spotlight_card-image__4S6cS"><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt7ff1ccfd985c417e/650c1da0aa86c1030ccc2891/logo-nav-dropdown-48x48-rwe.svg" alt="" class=""/></div><div class="Spotlight_card-body___rb9E"><p>了解 RWE 如何为其可再生能源交易业务提供支持</p><a class="button Spotlight_stretched-link__2M98R btn-tertiary" href="/customers/rwest" tabindex="-1"><span class="jsx-1276535992 btn-copy">了解详情</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div><div class="Spotlight_spotlight-card__Qi_WV"><div class="Spotlight_card-image__4S6cS"><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt90a52ed02808cbc1/650c1dadb25642d90add1e4e/logo-nav-dropdown-48x48-comcast.svg" alt="" class=""/></div><div class="Spotlight_card-body___rb9E"><p>了解 Comcast 如何提高工程速度并加速创新</p><a class="button Spotlight_stretched-link__2M98R btn-tertiary" href="/customers/comcast" tabindex="-1"><span class="jsx-1276535992 btn-copy">了解详情</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div></div></div></div></div></div></div></div><div><button class="Items_navigation-items_item__7YSef" aria-label="资源, press down to open menu." aria-expanded="false">资源<svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewbox="0 0 16 16"><path fill-rule="evenodd" d="M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z"/></svg></button><div class="Dropdown_Dropdown__pUJPf "><div class="Dropdown_DropdownContent__tGePQ"><button class="Dropdown_DropdownClose__wx62b" disabled=""><span class="Dropdown_DropdownClose_text__IoOgP">Close panel</span><svg class="icons_icon__n3nWe" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewbox="0 0 16 16" fill="none"><path fill-rule="evenodd" clip-rule="evenodd" d="M6.58586 8.00008L0.292969 14.293L1.70718 15.7072L8.00008 9.41429L14.293 15.7072L15.7072 14.293L9.41429 8.00008L15.7072 1.70718L14.293 0.292969L8.00008 6.58586L1.70718 0.292969L0.292969 1.70718L6.58586 8.00008Z"/></svg></button><div class="Dropdown_DropdownSections__G_B5O Dropdown_DropdownSections-with-footer__mc8vU"><div class="Items_Section__vJ9lm Items_four-column__XFFHc"><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt96bf0c70d7851e7d/64b6cd8378402d4f9cc28b43/icon-code-self-closing.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div><h2 class="h5">开发人员</h2></div><div class="Card_card-body__81rqO"><div><p>深入了解与代码、论坛和群组相关的所有内容。</p></div><ul><li><a class="Card_dropdown-link__qZWTu" href="/community" tabindex="-1">社区<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="https://discuss.elastic.co/" tabindex="-1">论坛<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/downloads" tabindex="-1">下载<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div></div><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt96bf0c70d7851e7d/64b6cd8378402d4f9cc28b43/icon-code-self-closing.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div><h2 class="h5">保持联系</h2></div><div class="Card_card-body__81rqO"><div><p>及时了解最新科技主题、创新技术和新闻。</p></div><ul><li><a class="Card_dropdown-link__qZWTu" href="/events" tabindex="-1">活动<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/blog" tabindex="-1">博文<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div></div><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt96bf0c70d7851e7d/64b6cd8378402d4f9cc28b43/icon-code-self-closing.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div><h2 class="h5">学习</h2></div><div class="Card_card-body__81rqO"><div><p>提高技能，开启未来成功之门。</p></div><ul><li><a class="Card_dropdown-link__qZWTu" href="/getting-started" tabindex="-1">开始使用<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/learn" tabindex="-1">Elastic 资源<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/consulting" tabindex="-1">咨询服务<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/training" tabindex="-1">培训和认证<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="https://www.elastic.co/security-labs" tabindex="-1">安全实验室<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div></div><div class="&#10; Card_nav-card__Gb2bd&#10; &#10; Card_icon-card__IEL2U&#10; &#10; "><div class="Card_card-header__dLhyK"><div class="Card_card-image__34JYo"><div class="&#10; Card_icon__VSCRq&#10; &#10; "><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt96bf0c70d7851e7d/64b6cd8378402d4f9cc28b43/icon-code-self-closing.svg" class="Card_img-fluid__EqrlH" alt=""/></div></div><h2 class="h5">帮助</h2></div><div class="Card_card-body__81rqO"><div><p>无论是什么主题，都能找到所需的支持。</p></div><ul><li><a class="Card_dropdown-link__qZWTu" href="/contact?storm=global-header-en" tabindex="-1">联系我们<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li><li><a class="Card_dropdown-link__qZWTu" href="/support" tabindex="-1">支持中心<svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M0 7H25" stroke="#0077CC" stroke-width="2"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2"/></svg></a></li></ul></div></div></div><div class="Items_dropdown-footer__rsdoR Items_Section__vJ9lm undefined Items_spotlight-feature___wj__"><h2 class="Items_topic-heading__deHHW">了解 Elastic 的最新动态</h2><div class="Items_cards-container__o31ia"><div class="Spotlight_spotlight-card__Qi_WV Spotlight_footer-spotlight__tuaW6"><div class="Spotlight_card-image__4S6cS"><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/bltd840a65f9b021457/64dba3c1557244be8be230d8/illustration-nav-demo-gallery-play-button.png" alt="" class=""/></div><div class="Spotlight_card-body___rb9E"><p>查看我们的演示库</p><a class="button Spotlight_stretched-link__2M98R btn-tertiary" href="/demo-gallery" tabindex="-1"><span class="jsx-1276535992 btn-copy">了解详情</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div><div class="Spotlight_spotlight-card__Qi_WV Spotlight_footer-spotlight__tuaW6"><div class="Spotlight_card-image__4S6cS"><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/bltbe3beafd64866bc1/64dba3cca244990c95558708/illustration-nav-getting-started-paper-airplane.png" alt="" class=""/></div><div class="Spotlight_card-body___rb9E"><p>Elasticsearch 入门</p><a class="button Spotlight_stretched-link__2M98R btn-tertiary" href="/webinars/getting-started-elasticsearch" tabindex="-1"><span class="jsx-1276535992 btn-copy">马上观看 </span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div><div class="Spotlight_spotlight-card__Qi_WV Spotlight_footer-spotlight__tuaW6"><div class="Spotlight_card-image__4S6cS"><img src="https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt889673e6d8e2363b/6601d97c0061c7514010327b/illustration-nav-whats-new-8-13.png" alt="" class=""/></div><div class="Spotlight_card-body___rb9E"><p>Elastic 8.13 版的新功能</p><a class="button Spotlight_stretched-link__2M98R btn-tertiary" href="/whats-new" tabindex="-1"><span class="jsx-1276535992 btn-copy">了解详情</span><svg width="27" height="14" viewbox="0 0 27 14" fill="none" xmlns="http://www.w3.org/2000/svg" class="jsx-1276535992"><path d="M0 7H25" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/><path d="M19 1L25 7L19 13" stroke="#0077CC" stroke-width="2" class="jsx-1276535992"/></svg></a></div></div></div></div></div></div></div></div><a href="/pricing" class="Items_navigation-items_item__7YSef">定价</a><a href="https://www.elastic.co/guide/index.html" class="Items_navigation-items_item__7YSef">文档</a></nav></div></div></div></div></div></header><main id="main-content" role="main"><div class="jsx-4128762135 blog-detail"><section class="jsx-4128762135"><div style="background-image:linear-gradient(rgba(0, 85, 113, 0.5), rgba(0, 85, 113, 0.5)), url(https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt034179a72a8647d8/5c583b7ba209c1ca0be9df2c/duplication_banner.jpg);background-repeat:no-repeat;background-position:center;background-size:cover" class="jsx-4128762135 hero-image py-8"><div class="jsx-4128762135 container"><div class="jsx-4128762135 full-bleed-image-wrapper"><div class="jsx-4128762135 full-bleed-image"><span class="jsx-4128762135 blog-date"><time datetime="1539878400000">2018年10月18日</time></span><a class="category-label label-engineering" href="/cn/blog/category/engineering">工程</a><div class="jsx-1955866259 title-wrapper"><h1 tag="H1" id="防止-elasticsearch-中出现重复事件型数据的高效方法" class="jsx-1955866259 h3">防止 Elasticsearch 中出现重复事件型数据的高效方法</h1></div><div class="jsx-4128762135 author-name d-flex my-2 paragraph-medium"><span class="jsx-4128762135 mr-1">作者</span><div class="jsx-4128762135 d-flex flex-wrap"><a href="/cn/blog/author/christian-dahlqvist">Christian Dahlqvist</a></div></div><p class="jsx-4128762135 share-label mb-1">分享</p><ul class="jsx-3582162638 horizontalLayout social-media"><li title="在 Twitter 上分享" class="jsx-3582162638 social-btn twitter"><a href="#" alt="在 Twitter 上分享"/></li><li title="在 Facebook 上分享" class="jsx-3582162638 social-btn facebook"><a href="#" alt="在 Facebook 上分享"/></li><li title="在 LinkedIn 上分享" class="jsx-3582162638 social-btn linkedin"><a href="#" alt="在 LinkedIn 上分享"/></li></ul></div></div></div></div><div class="layout layout-05"/><div class="jsx-4128762135 article-post-wrapper blog clearfix paragraph-medium"><div class="jsx-4128762135 container"><div class="jsx-4128762135 row"><div class="jsx-4128762135 col-12 col-lg-9"><div class="jsx-4128762135 paragraph-medium"><p>很多不同用例中都会用到 Elastic Stack。最常见的用例之一是储存并分析不同类型的事件型或时序型数据，例如安全事件、日志和指标。这些事件的组成数据通常与特定时间戳相关，这些时间戳表示事件的发生时间或收集时间，多数情况下并没有自然键来对事件进行唯一标识。 </p><p>针对某些用例而言，甚至对用例内的某些数据类型而言，很重要的一点要求即是 Elasticsearch 中的数据不能有重复值：重复文档可能会导致无法正确分析，也可能会导致搜索错误。我们去年便开始关注这一问题，详见博文<a href="/cn/blog/logstash-lessons-handling-duplicates">使用 Logstach 处理去重问题初探</a>，在本篇博文中，我们将会更加深入地进行讲解，并解决一些常见问题。 </p><h2>将数据索引到 Elasticsearch 中</h2><p>将数据索引到 Elasticsearch 中时，您需要收到响应才能确定数据已经成功完成索引。如果由于错误（例如连接错误或者节点崩溃）而导致您无法收到响应，则您将无法确定是否已对任何数据完成索引。客户遇到这种情况时，确保索引成功的标准做法是重试，而这可能会导致对同一份文档索引多次。 </p><p>如在有关去重的那篇博文中所述，为了避免这个问题，您或许可以在客户端中为每份文档定义一个唯一的 ID，而不是让 Elasticsearch 在索引时自动分配 ID。当将重复文档写入同一索引中时，Elasticsearch 将会进行更新，而不是重新写入，通过这种方式便可防止出现重复值。 </p><h2>UUID 与基于哈希函数的文档 ID 之间的对比</h2><p>在决定使用何种类型的标识符时，有两种主要的标识符可供选择。 </p><p><a href="https://en.wikipedia.org/wiki/Universally_unique_identifier">通用唯一标识符</a> (UUID) 是基于 128 位数字的标识符，可由分布式系统生成，基本可以确保唯一性。这种类型的标识符通常与相关联事件的内容无关。 </p><p>如要使用 UUID 来避免出现重复值，至关重要的一点是：在对事件进行任何传输活动之前，便需要生成 UUID 并分配给事件，通过这种做法，便可确保仅对事件传送一次。通常情况下，这便意味着必须在源头处分配 UUID。如果发生事件时所在的系统无法生成 UUID，则可能需要使用另外一种类型的标识符。 </p><p>另外一种主要标识符则是使用<a href="https://en.wikipedia.org/wiki/Hash_function">哈希函数</a>基于事件内容生成的数字型哈希值。对于每条具体内容，哈希函数一直都会生成相同的值，但是并不能确保所生成值的唯一性。如果两个不同事件产生的哈希值相同，这种情况称为哈希值冲突；<a href="https://preshing.com/20110504/hash-collision-probabilities/">哈希值冲突的几率</a>取决于索引中的事件数量、所用哈希函数的类型，以及所生成值的长度。在很多种情况下，长度至少为 128 位的哈希值（例如 MD5 或 SHA1）通常可以在长度和低冲突几率之间达到一个很好的平衡。如要在更高程度上确保唯一性，可以使用更长的哈希值，例如 SHA256。 </p><p>由于基于哈希函数的标识符取决于事件内容，所以可以在后期处理阶段再为事件分配哈希值，因为无论在什么系统中，都会计算得出相同的值。这种方式让用户有可能在将数据索引到 Elasticsearch 中之前的任意时刻分配此类 ID，所以设计采集管道时可以更加灵活。 </p><p>Logstash 支持计算 UUID，同时还通过 <a href="/guide/en/logstash/6.4/plugins-filters-fingerprint.html">fingerprint filter plugin</a>（指纹筛选插件）提供一系列热门且十分常用的哈希函数。 </p><h2>如何选择高效的文档 ID</h2><p>如果允许 Elasticsearch 在索引时为文档分配标识符，由于 Elasticsearch 知道所生成的标识符不可能存在于索引中，所以能够执行优化。此种做法能够改善索引性能。对于外部生成并随文档传输到 Elasticsearch 中的标识符，Elasticsearch 必须将其视为潜在更新，并在既有的索引区段中查看文档标识符是否已经存在，由于这需要完成额外工作，所以会慢一些。 </p><p>所生成的外部文档标识符并非都具有相同的索引性能。通常而言，相较于完全随机生成的标识符，随时间按升序生成的标识符的索引性能会更好。之所以会这样，是因为：Elasticsearch 能够基于既有索引区段的最小和最大标识符值快速确定某个标识符是否存在于此索引区段中，而无需搜索整个索引区段。这一点在此篇<a href="http://blog.mikemccandless.com/2014/05/choosing-fast-unique-identifier-uuid.html">博文</a>中有详细讲解，虽然这篇文章的时间有点久了，但是仍然能够起到帮助作用。 </p><p>基于哈希函数的标识符以及很多类型的 UUID 通常都是随机性质的。当处理事件流并且其中的每个事件都有确定的时间戳时，我们可以使用时间戳作为标识符的前缀，以便对标识符进行排序，进而改善索引性能。 </p><p>创建标识符时加上时间戳前缀还有一个优势，即降低哈希值冲突的几率，因为哈希值只要针对每个时间戳是唯一值便可以了。采用这种办法，即使在高采集量的情况下，也可以使用较短的哈希值。 </p><p>我们可以在 Logstash 中创建这些类型的标识符，做法是：使用 fingerprint filter plugin（指纹筛选插件）生成 UUID 或哈希值，并使用 Ruby 筛选器来创建时间戳的十六进制编码字符串表达式。假设我们有一个可以应用哈希函数的<code>消息</code>字段，并且事件中的时间戳已经解析到 <code>@timestamp</code> 字段中，则我们可以创建标识符的组成部分，并像下面这样以元数据的形式进行存储： </p><pre class="prettyprint">fingerprint { source =&gt; "message" target =&gt; "[@metadata][fingerprint]" method =&gt; "MD5" key =&gt; "test" ruby { code =&gt; "event.set('@metadata[tsprefix]', event.get('@timestamp').to_i.to_s(16))" </pre><p>然后可以使用这两个字段在 Elasticsearch 输出插件中生成一个文档 ID： </p><pre class="prettyprint">elasticsearch { document_id =&gt; "%{[@metadata][tsprefix]}%{[@metadata][fingerprint]}" </pre><p>最后生成的文档 ID 采用的是 16 进制编码，并且长度为 40 个字符，例如 <code>4dad050215ca59aa1e3a26a222a9bbcaced23039</code>。有关完整的配置示例，请参见<a href="https://gist.github.com/cdahlqvist/8ff8fb8e56c43414396edf60e7944144">这个 Gist</a>。 </p><h2>对索引性能的影响</h2><p>使用不同类型标识符所造成的影响在很大程度上取决于您的数据、硬件和用例。尽管我们可以给出一些通用的指南，但很重要的一点是运行基准测试来准确确定标识符对您的用例的影响。 </p><p>如要实现最优的索引处理量，最高效的方式肯定是使用 Elasticsearch 自动生成的标识符。由于无需进行更新检查，索引性能不会随着索引和分片规模的增加而受到大幅影响。因此，但凡有可能，我们都推荐使用这种方法。 </p><p>如果使用外部 ID，进行更新检查时需要额外的磁盘访问权限。此种方式造成的影响取决于多个因素：操作系统对所需数据进行缓存的效率如何，存储的速度如何，以及存储处理随机读取请求的表现如何。随着索引和分片规模的增加，由于需要检查的区段越来越多，索引速度通常也会变慢。 </p><h2>使用滚动 API</h2><p>对于传统的时序型索引，每个索引都会涵盖特定的固定时间段。这意味着，如果数据量会随着时间波动，索引和分片的规模会有很大差别。分片规模不均并非理想状况，可能会导致性能问题。 </p><p>我们推出了 <a href="/guide/en/elasticsearch/reference/6.4/indices-rollover-index.html">rollover index API</a>（滚动索引 API），支持用户基于多个条件（而非仅限时间）灵活地管理时序型索引。通过此 API，您能够在索引达到特定规模、文档数量和/或时间后，便滚动至下一个新索引，这样便可以更好地预测所生成分片和索引的规模。 </p><p>然而，这样做的话，会打破事件时间戳与其所属索引之间的联系。如果严格基于时间进行索引，则无论处理时间的早晚，某个事件都会归属到同一个索引中。正是基于这一原则，您才能够使用外部标识符防止出现重复值。然而使用滚动 API 时，虽然您能够降低出现重复值的几率，但是却无法完全防止出现重复值。有可能会出现下面这种情况：两个重复事件分别到达滚动前和滚动后的两个索引，尽管这两个事件的时间戳相同，Elasticsearch 却不会进行更新，而是会将它们存储在这两个不同的索引中。