key的一个格式约定：object-type🆔field。用":"分隔域，用"."作为单词间的连接，如"comment:12345:reply.to"。 不推荐含义不清的key和特别长的key。
一般的设计方法如下：
例如用户表 user, 转换为key-value存储：
bash
set user:userid:9:username lisi
set user:userid:9:password 111111
set user:userid:9:email lisi@163.com例如，查看某个用户的所有信息为： keys user:userid:9*
如果另一个列也常常被用来查找，比如username，则也要相应的生成一条按照该列为主的key-value，例如： set user:username:lisi:userid 9 此时相当于RDBMS中在username上加索引，我们可以根据 username:lisi:uid,查出userid=9，再查user:9:password/email ...
列表：
bash
# Rename the key
newkey = "gc:hashes:" + redis.INCR("gc:index")
redis.RENAME("my.list.key", newkey)
# Trim off elements in batche of 100s
while redis.LLEN(newkey) > 0
redis.LTRIM(newkey, 0, -99)
end集合：
bash
# Rename the key
newkey = "gc:hashes:" + redis.INCR("gc:index")
redis.RENAME("my.set.key", newkey)
# Delete members from the set in batches of 100
cursor = 0
loop
cursor, members = redis.SSCAN(newkey, cursor, "COUNT", 100)
if size of members > 0
redis.SREM(newkey, members)
end
if cursor == 0
break
end
end排序集合：
bash
# Rename the key
newkey = "gc:hashes:" + redis.INCR("gc:index")
redis.RENAME("my.zset.key", newkey)
# Delete members from the sorted set in batche of 100s
while redis.ZCARD(newkey) > 0
redis.ZREMRANGEBYRANK(newkey, 0, 99)
endHash:
bash
# Rename the key
newkey = "gc:hashes:" + redis.INCR( "gc:index" )
redis.RENAME("my.hash.key", newkey)
# Delete fields from the hash in batche of 100s
cursor = 0
loop
cursor, hash_keys = redis.HSCAN(newkey, cursor, "COUNT", 100)
if hash_keys count > 0
redis.HDEL(newkey, hash_keys)
end
if cursor == 0
break
end
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