Shulou(Shulou.com)06/01 Report--

Memcached distributed memory object caching system

Caching in memory; caching the fetched objects or data in memory; the data cached in memory are accessed through API

The data is like a HASH table, which exists in the form of key-value pairs.

It is used to reduce the pressure on the database, improve the response speed of the website, and build fast and scalable web applications.

Built-in memory management; use LUR to automatically delete unused storage and reuse memory space for expired data.

So the cached data will be lost after restarting the machine.

Download depends on libevent

It can also be installed by yum

# yum install libevent

Source code

# https://github.com/libevent/libevent/releases/download/release-2.0.22-stable/libevent-2.0.22-stable.tar.gz

# tar-xf libevent-2.0.22-stable.tar.gz

# cd libevent-2.0.22-stable

#. / configure

# make & & make install

Download and install memcached

# wget https://memcached.org/latest

[you might need to rename the file] the default is the latest version

# tar-zxf memcached-1.x.x.tar.gz

# cd memcached-1.x.x

#. / configure-prefix=/usr/local/memcached

# make & & make test & & sudo make install

Failed to start?

[root@Ansible memcached-1.4.30] # / usr/local/bin/memcached

/ usr/local/bin/memcached: error while loading shared libraries: libevent-2.0.so.5: cannot open shared object file: No such file or directory

[root@Ansible memcached-1.4.30] # find /-name libevent-2.0.so.5

/ opt/memcached/libevent-2.0.22-stable/.libs/libevent-2.0.so.5

/ usr/local/lib/libevent-2.0.so.5

Edit / etc/ld.so.conf add above

[root@Ansible memcached-1.4.30] # vi / etc/ld.so.conf

[root@Ansible memcached-1.4.30] # ldconfig

Startup: specify root or switch non-root

[root@Ansible memcached-1.4.30] # / usr/local/bin/memcached-m 32m-p 11211-d-u root

# yum install telnet

[root@Ansible memcached-1.4.30] # telnet 127.0.0.1 11211

Trying 127.0.0.1...

Connected to 127.0.0.1.

Escape character is'^]'.

View status:

Stats

Management tools

Memcached-tool

Yum install memcached-tool

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