Migrate from Redis to SSDB

Tools

The PHP script redis-import.php in tools/ directory is the script to copy data from a Redis instance to a SSDB instance.

Usage:

php redis-import.php redis_host redis_port redis_db ssdb_host ssdb_port
Options:
redis_host: The IP address or hostname of Redis instance
redis_port: The port number of Redis instance
redis_db: Which Redis database(a number) you want to copy from
ssdb_host: The IP address or hostname of SSDB instance
ssdb_port: The port number of SSDB instance
Make sure you have the PHP Redis module https://github.com/nicolasff/phpredis installed.
Supported Redis Tools
		Supported
SSDB vs Redis Commands
SSDB supports Redis network protocol, you can use Redis clients to connect to a SSDB server and operate on it.
But if you want to use SSDB clients, you will need this Redis-To-SSDB commands transfrom table.
Key-Value
		Redis
	getget
	setset
	setexsetx(for kv type only)
	deldel
	incr/incrByincr
	decr/decrBydecr
	mget/getMultiplemulti_get
	setMultiplemulti_set
	del(multiple)multi_del
	keyskeys(for kv type only)
	getsetgetset
	setnxsetnx
	existsexists
	ttlttl
	expireexpire
	getbitgetbit
	setbitsetbit
	bitcountredis_bitcount, countbit
	strlenstrlen
	getrangegetrange
Please read these notes very carefully:
substr command is deprecated in Redis, so you should never use substr with a Redis client(however, you CAN do this, but MUST not do this)
use getrange instead if you are sticking your mind with Redis
notice the difference between substr(start, size) and getrange(start, end)
when size is negative, the behavior may be strange for those who are not familiar with PHP language
substr in SSDB works as described here
Key-Map(Hash)
		Redis
	del(not supported)hclear
	hgethget
	hsethset
	hdel, hmdelhdel, multi_hdel
	hIncrByhincr
	hDecrByhdecr
	hKeyshkeys
	hValshscan
	hMGetmulti_hget
	hMSetmulti_hset
	hLenhsize
	hExistshexists
	keyshlist(for hash type only)
If you want to delete a hash entirely, you have to use a SSDB client to execute hclear command. You cannot delete a hash with any Redis client.
Key-Zset
		Redis
	del(not supported)zclear
	zScorezget
	zAddzset
	zRemzdel
	zRangezrange
	zRevRangezrrange
	zRangeByScorezscan
	zRevRangeByScorezrscan
	zIncrByzincr
	zDecrByzdecr
	zCountzcount
	zSumzsum
	zAvgzavg
	zCardzsize
	zRankzrank
	zRemRangeByRankzremrangebyrank
	zRemRangeByScorezremrangebyscore
	keyszlist(for zset type only)
If you want to delete a zset entirely, you have to use a SSDB client to execute zclear command. You cannot delete a zset with any Redis client.
Key-List/Queue
		Redis
	del(not supported)qclear
	llen/lsizeqsize
	lpushqpush_front
	rpushqpush_back
	lpopqpop_front
	rpopqpop_back
	lrangeqslice
	lindex, lgetqget
	lsetqset
	keysqlist(for queue/list type only)
If you want to delete a list entirely, you have to use a SSDB client to execute qclear command. You cannot delete a list with any Redis client.