Installation and configuration of Memcache caching system, operation under Linux and Windows

Memcache is an efficient caching system that is widely used in web applications, databases and other fields, and can significantly improve system performance and availability. This article will introduce the steps and precautions for installing and configuring the Memcache cache system under Linux and Windows operating systems.

1. Installation under Linux

1. apt-get installation

In Debian/Ubuntu and other Debian-based Linux distributions, you can use apt -get tool for installation:

$ sudo apt-get update
$ sudo apt-get install memcached

2. yum installation

In Red Hat-based Linux distributions such as CentOS, you can use the yum tool for installation:

$ sudo yum install memcached

2. Installation under Windows

Under Windows, you can download the Windows binary installation package of Memcached from the official website for installation. The download address is: http://memcached.org/files/.

After downloading, extract it to any directory and run memcached.exe.

3. Configure Memcache

1. Run Memcache

Under Linux, use the following command to start Memcache:

$ memcached -d -u root -m 64 -p 11211

Among them, the parameters -d means running in daemon mode, -u root means running with root privileges, -m 64 means the maximum memory is 64MB, and -p 11211 means the listening port number is 11211.

Under Windows, just run memcached.exe directly.

2. Test the connection

Use the telnet command to test whether the connection is successful:

$ telnet localhost 11211

If the connection is successful, the following information will be returned:

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.

3. Configuring the client

When using Memcache in a web application or database, you need to install the corresponding client library. In PHP, you can use PECL to install the Memcache extension:

$ pecl install memcache

After successful installation, add the following line in php.ini:

extension=memcache.so

4. Precautions

1. Firewall Settings

In Linux systems, port 11211 needs to be opened in the firewall:

$ sudo ufw allow 11211

In Windows systems, port 11211 needs to be opened in Windows Firewall.

2. Memory allocation

Memcache uses memory as the cache storage medium. It needs to allocate appropriate memory size according to actual needs to avoid cache failure due to insufficient memory.

3. Backup and recovery

Memcache does not support data persistence, so backup and recovery are required to ensure data security.

4. Cluster deployment

In a high-load environment, multiple Memcache servers can be used to form a cluster to improve load capacity and availability.

Summary

The Memcache caching system is an efficient caching tool that can significantly improve system performance and availability. Although installing and configuring Memcache under Linux and Windows operating systems is relatively simple, you still need to pay attention to some details to ensure system stability and security.

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