Programmer Group

As mentioned in the previous article Redis Installation and Operation . Today let's look at Redis's master-slave replication, Sentinel; I. Master-slave duplication 1. configuration Modify redis.conf on Master // Do not want to use password, so set protection mode to no protected-mode no // In fact, there is no need to configure anyth ...

I. Preface Practice is the sole criterion for testing truth. It's shallow on paper. If you want to know a person, just rely on personal data, even if you meet and talk about one or two sentences, it will also produce a lot of contingent results. As the saying goes, adversity can see the truth. Of course, here is not to let you ...

Redis Operational Command for key del key1 key2 Keyn To delete one or more keys rename key newkey The function assigns a new key name to the key renamenx key newkey Function to rename key to newkey move key db keys pattern queries for corresponding key s Random key returns random key exists key Determine whether key exist ...

public void testClient() { jedisCli = new Jedis("127.0.0.1", 6379); //New Jedis object jedisCli.select(2); //Select Redis database number jedisCli.set("firstJedis", "hello,Jedis"); //It is basically the same as the redis command line client operation. System.out.println(jedisCli.get("firstJedis")); System.out.println(jedisCli.exists(" ...

I. Integrated Environment Tomcat7 JDK1.7 Jedis-2.7.2 Spring-4.1.6 II. Resource Dependence (ellipsis, a lot on the internet) III. Integration process 1. Resource pool allocation This is managed using Jedis's Harded JedisPool. We define the configuration file as spring-redis.xml, which reads as follows: <?xml version="1.0" encoding=" ...

First of all, you know that Django is a synchronization framework. In order to speed up user response time and improve user experience. So I decided to use asynchronous tasks to perform some tasks in the background. In addition to asynchronous tasks, celery can also start timing tasks to facilitate scheduling. Packages to be ins ...

1. lua module demo (redis, http, mysql, cjson, local cache) 1.1. configuration Set lua_shared_dict my_cache 128m in nginx.conf; open nginx local cache and put it in http {} layer location configuration location /redis-get{ resolver 8.8.8.8; default_type text/html; content_by_lua_file /usr/local/openresty/lua/redis-get.lua; } Her ...

1. Calculate the hash value of the key. 2. The offset offset is calculated according to hash value and fixed segment size. 3. The bitKey of the segment is calculated according to the fixed pre-hash value/the size of the fixed segment. 4. Judge whether it exists according to bitKey and offset. 5. If it exists, then call containsFromDb to determi ...

Using Docker to Build Development Environment Since playing Docker, I have been deeply fascinated by Docker and have been working on software for so many years. I never expected that software would develop to this stage. Using container isolation technology to isolate various service processes, I am glad to have access to this ...

supervisor boot-up automatic restart script #! /bin/sh PATH=/sbin:/bin:/usr/sbin:/usr/bin PROGNAME=supervisord DAEMON=/usr/bin/$PROGNAME CONFIG=/etc/$PROGNAME.conf PIDFILE=/tmp/$PROGNAME.pid DESC="supervisord daemon" SCRIPTNAME=/etc/init.d/$PROGNAME # Gracefully exit if the package has been removed. test -x $DAEMON || exit 0 start() { ...