what is Redis<\/p>\n
Redis is a key-value storage system. Similar to Memcached, it supports storing relatively many value types, including string, list, set, and zset.
\nThese data types support push \/ pop, add \/ remove, and intersection and union and difference sets and richer operations, all of which are atomic.
\nOn this basis, Redis supports a variety of different sorts. Like memcached, data is cached in memory for efficiency.
\nThe difference is that Redis periodically writes updated data to disk or writes modifications to additional log files and implements master-slave synchronization based on this. Redis is a high-performance key-value database.
\nThe emergence of Redis, a large extent, to compensate for such lack of keyvalue memcached storage, in some cases can play a good complement to the relational database.<\/p>\n
<\/p>\n
1, Redis installation<\/p>\n
1.1 Pre-installation environment description<\/p>\n
Using a CentOS 7 version of Linux system with
\nmaster ip of 192.168.1.110
\nslave ip of 192.168.1.111 The<\/p>\n
1.2 Download Redis<\/p>\n
Redis can go to the official website to download: https:\/\/redis.io\/download , now the latest stable version has reached 4.0.
\nUsed here is redis-4.0.1.tar.gz .<\/p>\n
1.3 installation steps<\/p>\n
$ wget http:\/\/download.redis.io\/releases\/redis-4.0.1.tar.gz
\n$ tar xzf redis-4.0.1.tar.gz -C \/usr\/local\/
\n$ cd \/usr\/local\/redis-4.0.1
\n$ make & make test
\nmake Possible exceptions<\/p>\n
make[1]: Leaving directory `\/usr\/local\/redis-4.0.1\/src’ make[1]: Entering directory `\/usr\/local\/redis-4.0.1\/src’
\nYou need tcl 8.5 or newer in order to run the Redis test
\nmake[1]: *** [test] Error 1
\nmake[1]: Leaving directory `\/usr\/local\/redis-4.0.1\/src’
\nmake: *** [test] Error 2
\nsolution<\/p>\n
yum install -y tcl<\/p>\n
2, Redis simple configuration<\/p>\n
All configuration changes are in this configuration file<\/p>\n
\/usr\/local\/redis-4.0.1\/redis.conf<\/p>\n
<\/p>\n
2.2 bound host address<\/p>\n
Bind after the host to add ip,from behind Redis need to connect through the IP.<\/p>\n
bind 127.0.0.1 192.168.1.110<\/p>\n
2.3 Set Redis password<\/p>\n
The password is set herejaven<\/p>\n
# requirepass foobared
\nrequirepass mohan<\/p>\n
2.4 Set the Redis port number<\/p>\n
The default port is6379<\/p>\n
port 6379<\/p>\n
3, test Redis<\/p>\n
start up
\n\/usr\/local\/redis-4.0.1\/redis.conf
\nsrc\/redis-server<\/p>\n
src\/redis-server redis.conf
\nClient connection<\/p>\n
src\/redis-cli
\nsrc\/redis-cli -a mohan<\/p>\n
\/usr\/local\/redis-4.0.1\/redis.conf
\nsrc\/redis-cli shutdown
\nsrc\/redis-cli -p 6666 shutdown<\/p>\n
<\/p>\n
4, Redis master-slave replication configuration<\/p>\n
Redis master-slave replication is very powerful, a master can have multiple slaves, and a slave can have multiple slaves, so go on, forming a powerful multi-level server cluster architecture. The following simple configuration.<\/p>\n
Modify the slave’s redis configuration file<\/p>\n
Master’s redis configuration file bindcan be set as long as<\/p>\n
Slave redis modify the slave configuration file slaveof 10.211.55.3 6379 (mapped to the main server, 6379the port number)
\ncan also be dynamically set:
\nRedis-cli connected to the slave node server, execute the following command.
\nslaveof 10.211.55.3 6379<\/p>\n
If master sets the authentication password, you also need to configure masterauth. Here I set the master authentication password javen, so configure masterauth javen.<\/p>\n
After configuring the slave start the Redis service, OK, master-slave configuration is completed (is not very simple).
\nThe following test:
\nIn the master and slave, respectively, the info command to view the results are as follows:<\/p>\n
slave:<\/p>\n
[root@centos-linux-2 redis-4.0.1]# src\/redis-cli
\n127.0.0.1:6379> info<\/p>\n
<\/p>\n
<\/p>\n
5, Redis remote connection<\/p>\n
Usage: redis-cli [OPTIONS] [cmd [arg [arg …]]]<\/p>\n
-h <host ip>, the default is 127.0.0.1<\/p>\n
-p <port>, the default is 6379<\/p>\n
-a <password>, redis lock, you need to pass the password<\/p>\n
-help, Show help information<\/p>\n
redis-cli -h 10.211.55.4 -p 6379 -a javen<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
what is Redis<\/p>\n
Redis is a key-value storage system. Similar to Memcached, it supports storing relatively many value types, including string, list, set, and zset. These data types support push \/ pop, add \/ remove, and intersection and union and difference sets and richer operations, all of which are atomic. On this basis, Redis supports […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/7149"}],"collection":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7149"}],"version-history":[{"count":1,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/7149\/revisions"}],"predecessor-version":[{"id":7150,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/7149\/revisions\/7150"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}