redis commands

access swap files, preferably do not exceed the machine's core number, if set to 0, then all the swap file operation is serial, may cause a relatively long delay. The default value is 4Vm-max-threads 427. Set when replying to the client, whether to merge the smaller package into one package send, the default is to turn onGlueoutputbuf Yes28. Specifies that a special hashing algorithm is used when more than a certain number or maximum element exceeds a critical valueHash-max-zipmap-entries 64Has

Start Redis ServiceSrc/redis-server or Src/redis-server redis.confSrc/redis-server redis.conf 1>log.log 2>errlog.log1 is the standard output and 2 is the error outputRandomly start Redis as a Linux serviceVi/etc/rc.local, add code:/root/install/

Start Redis ServiceSrc/redis-server or Src/redis-server redis.confSrc/redis-server redis.conf 1>log.log 2>errlog.log1 is the standard output and 2 is the error outputRandomly start Redis as a Linux serviceVi/etc/rc.local, add code:/root/install/

First, Redis simple introduction Redis is a member of the NoSQL family, a memory-type database of key-value pairs. But it supports saving the data locally. This is better than memcached. Disadvantage: There is no local data buffer, there is no complete data aggregation support Advantages: Simple configuration, easy to use, high performance, support for different data types (hashes, lists, sets, sorted se

set than list fee memory (to store fractions, hashes, jump tables). Ii. common commands for Redis ordered sets Redis ordered set of commonly used commands are:,,,, zadd zrange zremrangebyrank zremrangebyscore zcard etc., these are used relatively high frequency, there are some parameters of the description. Let's ta

Get ready:Compress package to drag directlytar-zxf redis-3.0.0.tar.gz (root directory) Yum install gcc-c++ (c locale) CD redis-3.0.0 make (C language Compilation)Installation make install Prefix=/usr/local/redisBack-end Boot cp/root/redis-3.0.0/redis.conf./(copy files to bin)Modify file Vi/vim redis.conf daemonize Yeslinux Find/keyword down nStart: ./

element content group can be synthesized as a new key by a given pattern (patern), sorted by the content of the new key, and returned with a sorted set of elements.For example:The pattern ' name* ' represents the use of the fill in the Key1 collection *, gets 3 new key name1 name2 Name3 then sorts the values of these 3 keys, and the result of the sort is key1 the order in which the collection is returned.[Limit start Count]Limit can be used to limit the number of returned resultsFor example:Sta

Round (multiple) multi_delkeysscan (forkvtypeonly) RedisSSDBhashmaphgethgethsethsethdelhdelhIncrByhincrhDecrBy Redis SSDB kv get set del incr/incrBy incr decr/decrBy decr getMultiple multi_get setMultiple multi_set del (multiple) multi_del keys scan (for kv type only) redis SSDB hashmap hget hset hdel hIncrBy hincr hDecrBy Redis SSDB Kv

; DEL bar tip:The parameters of the DEL command do not support wildcards , but we can combine the Linux pipeline and the Xargs command to remove all the rules that match the key. For example, to delete all the keys that start with "User:", you can execute redis-cli keys "user:*" | xargs redis-cli DEL. In addition, because the DEL command supports multiple keys as parameters, it is also possible to execute

First, overview: Redis was defined at the beginning of the design as a long uninterrupted service process, so most of the system configuration parameters can be effective without restarting the process. Even switching the current persistence mode from AOF to RDB does not require a reboot.In Redis, a set of commands related to server administration, including the

Redis is a database of key-value pairs with 5 of the primary data types :String type (string), hash type (hash), list type (lists), collection type (set), Ordered collection type (zset)One: String typeThe string type is the most basic type of redis, and it can store any form of string. The other four types are different forms of string types.The most basic command: GET, SET Syntax: GET Key,set Key value val

Mysql, sqlsever, oracle, redis, mongo, postgres and other database backup and recovery commands, sqlseverredis The following is a simple example of how to back up and restore each database. For more detailed parameters and configurations, refer to relevant information. I. mysql: Parameter description: $ User $ Password $ Targethost $ Port $ Charset $ Dbname $ Table $ Filename

　　The various data types supported by Redis include String,list, set, sorted set, and hash.REdis is essentially a key-value db, so let's start by looking at his key. First, the key is also a string type, but the key cannot include boundary characters. because key is not a binary safe string, such as "My Key" and "mykey\n" keys that contain spaces and line breaks are not allowed. by the way, the use of binary characters is not restricted within

Redis itself does not differentiate between the case of commands, which are all lowercase, and the following are some simple commands.1.keys (... Get all the key information, if the amount of data is large, will affect performance, output will only output the key name, preceded by an ordinal prefix, parameter support regular.127.0.0.1:6379>Keys F*1) "Fo"2) "F"127

Post:1, and the fields are title, author, time, content, and the values are "the" the "the", "" "Me", "2014-03-04", "" "," "," "," ",", stored as follows Redis 127.0.0.1:6379> hmset post:1 title "The" "The" "The" the "" Author "JoJo" Time 2016/08/25 content "This is my OK The Hmset command is used here, and the basic assignment commands for the hash are as follows: hset key field value#例如hset

1, Redis-benchmarkRedis baseline information, Redis server performance detection Redis-benchmark-h localhost-p 6379-c 100-n 100000100 concurrent connections, 100,000 requests, detecting Redis server performance with host localhost port 6379 [Root@architect redis-1.2

Commands related to connection operations Quit: Close connection (connection) Auth: simple Password Authentication Persistence save: Save data synchronously to disk bgsave: Asynchronously saves data to disk lastsave: Returns the Unix timestamp shundown: Save data synchronously to disk, and then close the service remote Service Control info: Provides server information and stat

server side, such as unions, intersections, and differences. Because these operations are done on the server side, they are highly efficient and also save a lot of network IO overhead.Sadd Test_set a b c dsmembers Test_setsrem Test_set ASorted-sets basic operations: Sorted-sets and sets types are very similar, both are collections of strings and do not allow duplicate members to appear in a set. The main difference between them is that each member of the sorted-sets has a fraction (score) assoc

Briefly describe the general steps for self-testing and building a simple Redis cluster: 1. first, you have 6 apsaradb for redis instances (at least 6, 3 master, and 3 slave ). Briefly describe the general steps for self-testing and building a simple Redis cluster: 1. first, you have 6 apsaradb for redis instances (at

Xinxing analyzes key-related commands in Redis, and Xinxing analyzes rediskey In Redis, we can also directly operate on keys. The following are common commands: (1) keypattern: It indicates getting all the keys matching pattern. Note that we should avoid using this command because it is very time-consuming for large da