[root@mcw01 ~]$ ls anaconda-ks.cfg mongodb-linux-x86_64-3.2.8.tgz [root@mcw01 ~]$ wget http://download.redis.io/releases/redis-4.0.10.tar.gz --2022-03-05 18:27:02-- http://download.redis.io/releases/redis-4.0.10.tar.gz Resolving download.redis.io (download.redis.io)... 45.60.125.1 Connecting to download.redis.io (download.redis.io)|45.60.125.1|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 1738465 (1.7M) [application/octet-stream] Saving to: ‘redis-4.0.10.tar.gz' 100%[====================>] 1,738,465 63.4KB/s in 25s 2022-03-05 18:27:27 (68.2 KB/s) - ‘redis-4.0.10.tar.gz' saved [1738465/1738465] anaconda-ks.cfg mongodb-linux-x86_64-3.2.8.tgz redis-4.0.10.tar.gz [root@mcw01 ~]$ tar xf redis-4.0.10.tar.gz anaconda-ks.cfg mongodb-linux-x86_64-3.2.8.tgz redis-4.0.10 redis-4.0.10.tar.gz [root@mcw01 ~]$ cd redis-4.0.10/ [root@mcw01 ~/redis-4.0.10]$ ls #有makefile文件，就不需要./configure配置 00-RELEASENOTES COPYING Makefile redis.conf runtest-sentinel tests BUGS deps MANIFESTO runtest sentinel.conf utils CONTRIBUTING INSTALL README.md runtest-cluster src [root@mcw01 ~/redis-4.0.10]$ make
cd hiredis && make static
make[3]: Entering directory `/root/redis-4.0.10/deps/hiredis'
gcc -std=c99 -pedantic -c -O3 -fPIC -Wall -W -Wstrict-prototypes -Wwrite-strings -g -ggdb net.c
make[3]: gcc: Command not found
make[3]: *** [net.o] Error 127
make[3]: Leaving directory `/root/redis-4.0.10/deps/hiredis'
make[2]: *** [hiredis] Error 2
make[2]: Leaving directory `/root/redis-4.0.10/deps'
make[1]: [persist-settings] Error 2 (ignored)
CC adlist.o
/bin/sh: cc: command not found
make[1]: *** [adlist.o] Error 127
make[1]: Leaving directory `/root/redis-4.0.10/src'
make: *** [all] Error 2um install gcc patch libffi-devel python-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel openssl openssl-devel -y
然后重新执行:
[root@mcw01 ~/redis-4.0.10]$ make #发现报错没有某个目录或文件。在这之前编译失败了，目录被改变了部分，所以直接删除重新解压，然后make编译
......
Hint: It's a good idea to run 'make test' ;)
make[1]: Leaving directory `/root/redis-4.0.10/src'
[root@mcw01 ~/redis-4.0.10]$ ls
00-RELEASENOTES COPYING Makefile redis.conf runtest-sentinel tests
BUGS deps MANIFESTO runtest sentinel.conf utils
CONTRIBUTING INSTALL README.md runtest-cluster src
[root@mcw01 ~/redis-4.0.10]$ make install
cd src && make install
make[1]: Entering directory `/root/redis-4.0.10/src'
CC Makefile.dep
INSTALL install
[root@mcw01 ~/redis-4.0.10]$
[root@mcw01 ~/redis-4.0.10]$ redis-c #当编译好之后，就可以命令补全，也就是已经配置好环境变量了
redis-check-aof redis-check-rdb redis-cli
[root@mcw01 ~/redis-4.0.10]$ which redis-server #默认编译安装到/usr/local下去了
/usr/local/bin/redis-server
[root@mcw01 ~/redis-4.0.10]$[root@mcw01 ~]$ redis-server #安装好之后，直接运行这个命令
24270:C 05 Mar 18:43:08.857 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
24270:C 05 Mar 18:43:08.857 # Redis version=4.0.10, bits=64, commit=00000000, modified=0, pid=24270, just started
24270:C 05 Mar 18:43:08.857 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf
_._
_.-``__ ''-._
_.-`` `. `_. ''-._ Redis 4.0.10 (00000000/0) 64 bit
.-`` .-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in standalone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
| `-._ `._ / _.-' | PID: 24270
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
| `-._`-._ _.-'_.-' |
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
24270:M 05 Mar 18:43:08.880 # Server initialized
24270:M 05 Mar 18:43:08.880 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
24270:M 05 Mar 18:43:08.880 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
24270:M 05 Mar 18:43:08.880 * Ready to accept connections
客户端连接：
[root@mcw01 ~]$ redis-cli 127.0.0.1 6379 ^C #我再开一个窗口，默认连接的ip 端口
[root@mcw01 ~]$ redis-cli #连上之后，ping命令，返回pong,说明连接成功的
127.0.0.1:6379> ping
PONG
127.0.0.1:6379>[root@mcw01 ~]$ ln -s redis-4.0.10 redis [root@mcw01 ~]$ ls anaconda-ks.cfg dump.rdb mongodb-linux-x86_64-3.2.8.tgz redis redis-4.0.10 redis-4.0.10.tar.gz [root@mcw01 ~]$ ls redis 00-RELEASENOTES COPYING Makefile redis.conf runtest-sentinel tests BUGS deps MANIFESTO runtest sentinel.conf utils CONTRIBUTING INSTALL README.md runtest-cluster src [root@mcw01 ~]$ cd redis [root@mcw01 ~/redis]$ egrep -v "^#|^$" redis.conf >mcwRedis.conf [root@mcw01 ~/redis]$ cat mcwRedis.conf bind 127.0.0.1 protected-mode yes #保护模式开启，并且绑定ip是本机，应该是不支持远程访问，只支持本机访问。 port 6379 tcp-backlog 511 timeout 0 tcp-keepalive 300 daemonize no supervised no pidfile /var/run/redis_6379.pid loglevel notice logfile "" databases 16 always-show-logo yes save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename dump.rdb dir ./ slave-serve-stale-data yes slave-read-only yes repl-diskless-sync no repl-diskless-sync-delay 5 repl-disable-tcp-nodelay no slave-priority 100 lazyfree-lazy-eviction no lazyfree-lazy-expire no lazyfree-lazy-server-del no slave-lazy-flush no appendonly no appendfilename "appendonly.aof" appendfsync everysec no-appendfsync-on-rewrite no auto-aof-rewrite-percentage 100 auto-aof-rewrite-min-size 64mb aof-load-truncated yes aof-use-rdb-preamble no lua-time-limit 5000 slowlog-log-slower-than 10000 slowlog-max-len 128 latency-monitor-threshold 0 notify-keyspace-events "" hash-max-ziplist-entries 512 hash-max-ziplist-value 64 list-max-ziplist-size -2 list-compress-depth 0 set-max-intset-entries 512 zset-max-ziplist-entries 128 zset-max-ziplist-value 64 hll-sparse-max-bytes 3000 activerehashing yes client-output-buffer-limit normal 0 0 0 client-output-buffer-limit slave 256mb 64mb 60 client-output-buffer-limit pubsub 32mb 8mb 60 hz 10 aof-rewrite-incremental-fsync yes [root@mcw01 ~/redis]$
[root@mcw01 ~/redis]$ cat mcwRedis.conf bind 10.0.0.11 protected-mode yes port 6379 requirepass mcw123 #配置认证密码 daemonize yes #后台守护进程的方式开启 pidfile /var/run/redis_6379.pid loglevel notice logfile "" [root@mcw01 ~/redis]$ [root@mcw01 ~/redis]$ ls 00-RELEASENOTES COPYING Makefile README.md runtest-cluster src BUGS deps MANIFESTO redis.conf runtest-sentinel tests CONTRIBUTING INSTALL mcwRedis.conf runtest sentinel.conf utils [root@mcw01 ~/redis]$ redis-server mcwRedis.conf #指定配置文件启动。这应该是后面有注释导致的吧，去掉注释 *** FATAL CONFIG FILE ERROR *** Reading the configuration file, at line 4 >>> 'requirepass mcw123 #配置认证密码' Bad directive or wrong number of arguments 去掉注释,然后成功启动，这里不能在配置后面加注释，容易出错 [root@mcw01 ~/redis]$ vim mcwRedis.conf requirepass mcw123 daemonize yes [root@mcw01 ~/redis]$ redis-server mcwRedis.conf 24391:C 05 Mar 19:10:38.749 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo 24391:C 05 Mar 19:10:38.749 # Redis version=4.0.10, bits=64, commit=00000000, modified=0, pid=24391, just started 24391:C 05 Mar 19:10:38.749 # Configuration loaded [root@mcw01 ~/redis]$ netstat -lntup|grep redis #成功启动了 tcp 0 0 10.0.0.11:6379 0.0.0.0:* LISTEN 24392/redis-server [root@mcw01 ~/redis]$ redis-cli #现在直接这么连接就不行了 Could not connect to Redis at 127.0.0.1:6379: Connection refused not connected> [root@mcw01 ~/redis]$ redis-cli -h 10.0.0.11 -p 6379 #指定ip端口连接 10.0.0.11:6379> ping (error) NOAUTH Authentication required. 10.0.0.11:6379> auth mcw123 OK 10.0.0.11:6379> ping #认证之后就可以正常执行命令了 PONG 10.0.0.11:6379>
10.0.0.11:6379> set name mcw OK 10.0.0.11:6379> get name "mcw" 10.0.0.11:6379> set age 18 OK 10.0.0.11:6379> get age #它将值改为字符串类型的了 "18" 10.0.0.11:6379>
bind 192.168.182.130 #绑定服务端地址 protected-mode yes #安全模式 port 6800 #端口 requirepass haohaio #密码 daemonize yes #后台运行 pidfile /var/run/redis_6379.pid #进程id文件 loglevel notice #日志等级 logfile ""
redis is an advanced key:value storage system, in which value supports five data types
Strings
Hashes
Lists
Sets
Sorted sets
keys * View all keys
type key View key type
expire key seconds Expiration time
ttl key View the remaining time of key expiration - 2 means the key no longer exists
persist Cancel the expiration time of the key -1 indicates that the key exists and has no expiration time
exists key returns 1 to determine whether the key exists, otherwise 0
del keys Delete key You can delete multiple
dbsize Calculate the number of keys
flushdb #Clear All keys in redis, use with caution
flushdb #Clear all keys in redis, use with caution
flushdb #Clear all keys in redis, use with caution
keys * 10.0.0.11:6379> keys * 1) "age" 2) "name" 10.0.0.11:6379> set gender man OK 1) "gender" 2) "age" 3) "name" 10.0.0.11:6379> keys * 查看所有key type key 查看key类型 添加一个列表，查看key类型，是列表类型 10.0.0.11:6379> type name string 10.0.0.11:6379> LPUSH paidui1 xiaoma mcw (integer) 2 10.0.0.11:6379> keys * 1) "paidui1" 2) "gender" 3) "age" 4) "name" 10.0.0.11:6379> type paidui1 list expire key seconds 过期时间 ttl key 查看key过期剩余时间 -2表示key已经不存在了 给已有的paidui1设置一个过期时间多少秒，然后ttl key可以查看过期时间，当-2时就已经过期了，过期了就已经被移除了 10.0.0.11:6379> EXPIRE paidui1 10 (integer) 1 10.0.0.11:6379> ttl paidui1 (integer) -2 persist 取消key的过期时间 -1表示key存在，没有过期时间 比如下面，将name设置50秒过期，当要取消name的过期时间，执行命令后，ttl值变成-1，就不会出现过期删除的情况了 10.0.0.11:6379> EXPIRE name 50 10.0.0.11:6379> ttl name (integer) 22 (integer) 19 10.0.0.11:6379> PERSIST name (integer) -1 exists key 判断key存在 存在返回1 否则0 10.0.0.11:6379> exists name 10.0.0.11:6379> exists mcw (integer) 0 del keys 删除key 可以删除多个 4) "myname" 10.0.0.11:6379> del myname dbsize 计算key的数量 10.0.0.11:6379> dbsize (integer) 3 flushdb #清除redis所有key,慎用 10.0.0.11:6379> flushdb (empty list or set) 10.0.0.11:6379>
redis数据类型1,字符串类型,通过set命令,设置字符串类型的key
strings类型
set 设置key
get 获取key
append 追加string
mset 设置多个键值对
mget 获取多个键值对
del 删除key
incr 递增+1
decr 递减-1set 设置key get 获取key append 追加string 10.0.0.11:6379> set "name" "mcw" OK 10.0.0.11:6379> get name "mcw" 10.0.0.11:6379> append "name" "Haoren" (integer) 9 10.0.0.11:6379> get name "mcwHaoren" 10.0.0.11:6379> mset 设置多个键值对 mget 获取多个键值对 10.0.0.11:6379> mset name2 "xiaoma" "name3" xiaohong OK 10.0.0.11:6379> keys * 1) "name2" 2) "name" 3) "name3" 10.0.0.11:6379> get name2 "xiaoma" 10.0.0.11:6379> get name3 "xiaohong" 10.0.0.11:6379> 10.0.0.11:6379> mget name name2 name3 1) "mcwHaoren" 2) "xiaoma" 3) "xiaohong" 10.0.0.11:6379> del 删除key 10.0.0.11:6379> keys * 1) "name2" 2) "name" 3) "name3" 10.0.0.11:6379> del name (integer) 1 10.0.0.11:6379> del name2 name3 (integer) 2 10.0.0.11:6379> keys * (empty list or set) 10.0.0.11:6379> incr 递增+1 decr 递减-1 相当于把字符串转换为数字，计算后结果再改成字符串。 还可以减为负值 10.0.0.11:6379> keys * (empty list or set) 10.0.0.11:6379> set "dian zan" 0 OK 10.0.0.11:6379> get "dian zan" "0" 10.0.0.11:6379> incr "dian zan" (integer) 1 10.0.0.11:6379> incr "dian zan" (integer) 2 10.0.0.11:6379> get "dian zan" "2" 10.0.0.11:6379> incr "dian zan" (integer) 3 10.0.0.11:6379> get "dian zan" "3" 10.0.0.11:6379> decr "dian zan" (integer) 2 10.0.0.11:6379> get "dian zan" "2" 10.0.0.11:6379> 10.0.0.11:6379> keys * 1) "dian zan" 10.0.0.11:6379> 10.0.0.11:6379> get "dian zan" "2" 10.0.0.11:6379> decr "dian zan" (integer) 1 10.0.0.11:6379> decr "dian zan" (integer) 0 10.0.0.11:6379> decr "dian zan" (integer) -1 10.0.0.11:6379> decr "dian zan" (integer) -2 10.0.0.11:6379> decr "dian zan" (integer) -3
lpush Insert from the left side of the list
rpush Insert from the right side of the list
lrange Get elements of a certain length lrange key start stop
ltrim Intercept the list of a certain length
lpop Delete the leftmost An element
rpop deletes the rightmost element
lpushx/rpushx If the key exists, add the value. If it does not exist, it will not be processed.
lpush 从列表左边插 从左边插入，再从左边获取，先插入的在里面后取出，后插入的在左边先取出 10.0.0.11:6379> keys * (empty list or set) 10.0.0.11:6379> lpush paidui mcw1 mcw2 mcw3 mcw4 (integer) 4 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw4" 2) "mcw3" 3) "mcw2" 4) "mcw1" 10.0.0.11:6379> lpush paidui mcw5 (integer) 5 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw5" 2) "mcw4" 3) "mcw3" 4) "mcw2" 5) "mcw1" 10.0.0.11:6379> rpush 从列表右边插 从列表左边取，第一个取出来的是最后推入的，最后一个取出的是第一个推入的。 可以想象成如下排队顺序， mcw5 mcw4 mcw3 mcw2 mcw1 当从右边推入mcw6的时候就是 :mcw5 mcw4 mcw3 mcw2 mcw1 mcw6 当从左边取数据的时候就是： 第一次取：mcw5 第二次取: mcw4 .... 第六次取：mcw6 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw5" 2) "mcw4" 3) "mcw3" 4) "mcw2" 5) "mcw1" 10.0.0.11:6379> rpush paidui mcw6 (integer) 6 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw5" 2) "mcw4" 3) "mcw3" 4) "mcw2" 5) "mcw1" 6) "mcw6" lrange 获取一定长度的元素 lrange key start stop 取列表类型的数据，指定开始数据和结束数据，比如开始0，结束-1，这是取列表所有的值 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw5" 2) "mcw4" 3) "mcw3" 4) "mcw2" 5) "mcw1" 10.0.0.11:6379> 10.0.0.11:6379> keys * 1) "paidui" 10.0.0.11:6379> type paidui list 10.0.0.11:6379> get paidui #列表类型不能用get取值 (error) WRONGTYPE Operation against a key holding the wrong kind of value 10.0.0.11:6379> lrange paid 0 -1 #不存在的键 (empty list or set) 10.0.0.11:6379> 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw5" 2) "mcw4" 3) "mcw3" 4) "mcw2" 5) "mcw1" 10.0.0.11:6379> ltrim 截取一定长度列表 根据查询可知列表数据顺序如下：mcw5 mcw4 mcw3 mcw2 mcw1 索引分别是： 0 1 2 3 4 这里是从paidui左边截取，从索引1开始，从索引2结束，其中包含索引2的数据，截取之后，这个key的值就变成截取的值了mcw4 mcw3 然后从左边查询，第一个查出来的数据就是mcw4,第二个就是mcw3 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw5" 2) "mcw4" 3) "mcw3" 4) "mcw2" 5) "mcw1" 10.0.0.11:6379> ltrim paidui 1 2 OK 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw4" 2) "mcw3" 10.0.0.11:6379> lpop 删除最左边一个元素 rpop 删除最右边一个元素 根据lrange可以列表数据的顺序是：mcw5 mcw4 mcw3 mcw2 mcw1 mcw6 所以从左边删除，删的是mcw5,从右边删除，删的是mcw6 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw5" 2) "mcw4" 3) "mcw3" 4) "mcw2" 5) "mcw1" 6) "mcw6" 10.0.0.11:6379> lpop paidui "mcw5" 10.0.0.11:6379> rpop paidui "mcw6" 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw4" 2) "mcw3" 3) "mcw2" 4) "mcw1" 10.0.0.11:6379> lpushx/rpushx key存在则添加值，不存在不处理 不存在返回个0。默认key不存在会创建key的 10.0.0.11:6379> keys * 1) "paidui" 10.0.0.11:6379> lpushx paid mcw0 (integer) 0 10.0.0.11:6379> keys * 1) "paidui" 10.0.0.11:6379> lpushx paidui mcw0 (integer) 5 10.0.0.11:6379> keys * 1) "paidui" 10.0.0.11:6379> lrange paidui 0 -1 1) "mcw0" 2) "mcw4" 3) "mcw3" 4) "mcw2" 5) "mcw1" 10.0.0.11:6379>
There are also many set-related operations, such as adding new elements, deleting existing elements, taking intersections, taking unions, taking differences, etc. Let's look at an example:
sadd/srem Add/delete elements
sismember Determine whether it is an element of the set
smembers Return all members of the set
sdiff Returns the difference between a set and other sets
sinter returns the intersection of several sets
sunion returns the union of several sets
sadd/srem 添加/删除 元素 smembers 返回集合所有的成员 10.0.0.11:6379> keys * (empty list or set) 10.0.0.11:6379> sadd zoo gou mao zhu #添加 (integer) 3 1) "zoo" 10.0.0.11:6379> type zoo set 10.0.0.11:6379> smembers zoo #查询 1) "mao" 2) "zhu" 3) "gou" 10.0.0.11:6379> 10.0.0.11:6379> srem zoo zhu #删除 (integer) 1 10.0.0.11:6379> smembers zoo 2) "gou" 新增成员 10.0.0.11:6379> sadd zoo zhu #新增 sismember 判断是否为set的一个元素 mao是集合zoo里的成员吗，是，返回的是1； zhu是集合zoo里的成员吗，不是，返回的是0 10.0.0.11:6379> sismember zoo mao 10.0.0.11:6379> sismember zoo zhu (integer) 0 sdiff 返回一个集合和其他集合的差异 如下，sdiff 集合1 集合2 返回集合1中有的，而集合2中没有的。就是取差集 1) "zoo2" 2) "zoo" 10.0.0.11:6379> smembers zoo2 1) "she" 3) "shu" 10.0.0.11:6379> sdiff zoo zoo2 10.0.0.11:6379> sdiff zoo2 zoo 2) "shu" sinter 返回几个集合的交集 如下，几个集合应该不只是包含两个集合 10.0.0.11:6379> sinter zoo zoo2 1) "zhu" 10.0.0.11:6379> sinter zoo2 zoo sunion 返回几个集合的并集 集合取并集，几个集合应该不只是能用两个集合 10.0.0.11:6379> sunion zoo zoo2 4) "mao" 5) "shu" 10.0.0.11:6379>
hashes are hashes. Hash is a data structure only available since redis-2.0.0 version.
Hashes stores the mapping between strings and string values. For example, if a user wants to store his full name, surname, age, etc., it is suitable to use hashes.
hset Set the hash value
hget Get the hash value
hmset Set multiple pairs of hash values
hmget Get multiple pairs of hash values
hsetnx If the hash already exists, then Not set (prevents key overwriting)
hkeys Returns all fields
hvals Returns all values
hlen Returns the number of fields (fields) contained in the hash
hdel Delete the field (field) specified by the hash
hexists Determine whether there is
hset 设置散列值 hget 获取散列值 10.0.0.11:6379> hset stu1 name "mcw" age 18 height "170" (integer) 3 10.0.0.11:6379> keys * 1) "stu1" 10.0.0.11:6379> type stu1 hash 10.0.0.11:6379> hget stu1 name "mcw" 10.0.0.11:6379> hget stu1 age "18" 10.0.0.11:6379> hget stu1 height "170" 10.0.0.11:6379> 10.0.0.11:6379> hset new1 title "happy new year" content "ni hao" (integer) 2 10.0.0.11:6379> hmset 设置多对散列值 hmget 获取多对散列值 10.0.0.11:6379> 10.0.0.11:6379> keys * 1) "stu1" 2) "new1" 10.0.0.11:6379> hmget stu1 name age height 1) "mcw" 2) "18" 3) "170" 10.0.0.11:6379> hsetnx 如果散列已经存在，则不设置（防止覆盖key） 10.0.0.11:6379> hsetnx stu2 name "mcw2" age 18 height "168" (error) ERR wrong number of arguments for 'hsetnx' command 10.0.0.11:6379> 10.0.0.11:6379> hsetnx stu2 name "mcw2" (integer) 1 10.0.0.11:6379> hsetnx stu2 name "mcw2" (integer) 0 10.0.0.11:6379> keys * 1) "stu2" 2) "stu1" 3) "new1" 10.0.0.11:6379> hsetnx stu2 name "mcw1" (integer) 0 10.0.0.11:6379> hget stu2 name #存在stu2，使用hsetnx没被修改 "mcw2" 10.0.0.11:6379> hset stu2 name "mcw1" (integer) 0 10.0.0.11:6379> hget stu2 name #存在stu2，使用hset被修改了 "mcw1" 10.0.0.11:6379> hkeys 返回所有fileds 10.0.0.11:6379> keys * 1) "stu2" 2) "stu1" 3) "new1" 10.0.0.11:6379> hkeys stu1 1) "name" 2) "age" 3) "height" 10.0.0.11:6379> hvals 返回所有values 10.0.0.11:6379> keys * 1) "stu2" 2) "stu1" 3) "new1" 10.0.0.11:6379> hvals stu1 1) "mcw" 2) "18" 3) "170" 10.0.0.11:6379> hlen 返回散列包含域（field）的数量 10.0.0.11:6379> keys * 1) "stu2" 2) "stu1" 3) "new1" 10.0.0.11:6379> hkeys stu1 1) "name" 2) "age" 3) "height" 10.0.0.11:6379> hlen stu1 (integer) 3 10.0.0.11:6379> hkeys new1 1) "title" 2) "content" 10.0.0.11:6379> hlen new1 (integer) 2 10.0.0.11:6379> hdel 删除散列指定的域（field） 10.0.0.11:6379> keys * 1) "stu2" 2) "stu1" 3) "new1" 10.0.0.11:6379> type stu1 hash 10.0.0.11:6379> 10.0.0.11:6379> hkeys stu1 1) "name" 2) "age" 3) "height" 10.0.0.11:6379> hdel stu1 height #删除指定字段 (integer) 1 10.0.0.11:6379> hkeys stu1 1) "name" 2) "age" 10.0.0.11:6379> hexists 判断是否存在 10.0.0.11:6379> keys * 1) "stu2" 2) "stu1" 3) "new1" 10.0.0.11:6379> type stu1 hash 10.0.0.11:6379> hkeys stu1 1) "name" 2) "age" 10.0.0.11:6379> hexists stu1 name #存在字段返回1 (integer) 1 10.0.0.11:6379> hexists stu1 height #不存在字段返回0 (integer) 0 10.0.0.11:6379>
Main applications: notifications, announcements
Can be used as a message queue or message pipeline
One publication, multiple subscriptions
Publish: The radio station channel can send sound information to all people who receive this channel
Subscription: Many people can receive the news of this radio station
For example, QQ group announcement: one publish, multiple subscriptions (Received)
As follows, one publisher, two subscribers, Subscriber 1 subscribes to messages related to python and linux channels; Subscriber 2 subscribes to messages related to golang and Linux
When the publisher publishes a message, Subscriber 1 receives the message from the subscription channel python
When the publisher When the linux channel is published, both subscribers receive the message. The publisher also returns how many subscribers received the message. The above article is written incorrectly and is published to a channel that no one subscribes to, returning 0 subscribers
The channel published by the publisher and the channel received, this is required Accurate judgment, cannot fuzzy match the
of the received message. When the subscriber uses psubscribe here, it becomes the pattern
When a subscriber uses the psubscribe command and the subscribed channel uses a wildcard, then the channel published by the publisher that can be fuzzy matched with the subscriber will be received by the subscriber
The above is the detailed content of Example analysis of redis deployment and commands used for various data types. For more information, please follow other related articles on the PHP Chinese website!
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