redis notes

brew install redis

redis-server

select 0/1/2/3

set name ‘name‘

set user:1 ‘name‘

string

set

get

append keyname appendvalue

getrange keyname rangestart rangeend

setrange keyname rangestart value

getset keyname value

mset(m means multi) key value key value

mget key key key

incr key

decr key

incrby key step

deincrby key step

incrbyfload key floatvalue

setex key ttl value

psetex key ttl value // ttl is milliseconds

setnx key value

msetnx key value key value

strlen key

list

lpush listname value value value //l means left

rpush listname value value value //r means right

lpushx

rpushx

len listname //list length

lrange listname start end

lrange list 0 -1 //get all the list items

lpop listname

rpop listname

lrem listname numters to remove removevalues

for example:

lrem colors 2 green

lrem also can remove items backwards,for example:

lrem colors -2 green wlll remove items in colors from bottom to the top

linsert listname before value insertvalue

linsert listname after value insertvalue

Notice: redis commands also can be upper case ,for example:

LINSERT colors AFTER "yellow" "purple"

lindex listname index

lset listname index value

ltrim listname start end

rpoplpush listname otherlist

blpop listname time

brpop listname time

brpoplpush list list 0

hash

hset hashname keyname keyvalue

hget hashname key

hgetall hashname

hkeys hashname

hvals hashname

hexists hashname keyname

hincrby hashname key step

hincrbyfloat hashname key floatvalue

hlen hashname

hmget hasnname key key

hmset hashname key value key value

hsetnx hashname key value

hdel hashname key

set

sadd setname value value value

srem setname value

smembers setname

sismember setname value

scard setname

srandmember setname

spop setname

sdiff set1 set2

sdiffstore newset set1 set2

sinter set1 set2

sinterstore newset set1 set2

sunion set1 set2

sunionstore newset set1 set2

smove  fromset toset value

sorted set

zadd sortsetname weight value weight value weight value

zcard sortedsetname

zrange sortedsetname start end [withscores]

zrevrange sortedsetname start end [withscores]

zrangebyscore sortedsetname lowscore heighscore [withscore]

zrevrangebyscore sortedsetname heighscore lowscore [withscore]

zincrby sortedsetname score value

zscore sortedsetname value

zrank scortedsetname value

zrevrank sortedsetname value

zcount sortedsetname startscore endscore

zrem sortedsetname value

zremrangebyscore sortedsetname startscore endscore

zremrangebyrank sortedsetname startrange endrange

keys *user

exists key

type key

del

move key dbindex

expire key secondstoexpire

pexipre key sendstoexpire

expireat key timestamp

pexireat key timestamp

ttl

pttl

persist key

randomkey

rename

renamenx

sort

sort listname

sort listname limit from to

sort listname desc

sort listname desc limit from to

sort listname desc limit from to store listname

sort listname alpha

lrange medals 0 -1

third

second

first

keys medal:*

medal:third

medal:first

medal:second

hgetall medal:first

medal

gold

position

1

hgetall medal:second

medal

sliver

position

2

hgetall medal:third

medal

bronze

position

3

sort medals  by medal:*->position

sort medals  by medal:*->position get medal:*->medal

publish and subscribe commands

subscribe channelname channelname

publish channelname message

psubscribe a* //pattern subscribe

unsubscribe channelname channelname

punsubscribe channelpattern

transaction

multi

command

command

exec

discard //cancel the transaction

administration

redis.conf

daemonize yes

port 8888

loglevel  debug/verbose/notice/warning

logfile   /var/log/redis.log

save  howofentosave//seconds  howmanychanges

save 3000 1

requirepass password

rename-command config othercommandname

maxclients   8     //number of redis clients

slaveof localhost 6379

slave-read-only no

LUA scripting

validate lua script

eval "lua script" 0

i,e eval "return 1 + 1 " 0

eval "return redis.call(‘get‘,‘age‘)" 0

eval "return redis.call(‘get‘,keys[1])" 1 age

eval "return redis.call(‘get‘,keys[1]) - ARGV[1]" 1 age 2.5//simulate a decrbyfloat function

eval "redis.call(‘set‘,KEYS[1],redis.call(‘get‘,keys[1]) - ARGV[1])" 1 age 2.5//simulate a decrbyfloat function

11 common web use cases solved in redis

highscalability.com/blog/2011/7/6/11-common-web-use-cases-solved-in-redis.html