In this tutorial guide I will be guiding you through installation and configuration of Memcached on Fedora 35.
Memcached is a general-purpose distributed memory caching system. It is used to speed up dynamic databases-driven websites by caching data and objects in the RAM to reduce the number of times an external data source must be read.
Memcached has an API with a very large hash table distributed distributed across multiple machines. when a table is full, subsequent inserts cause older data to be purged in least recently used order.
Memcached is simple yet powerful. Its simple design provides quick deployment, ease of development and solves many problems facing large data caches.
How to Flush DNS cache on Ubuntu 20.04
- Root access to the server or sudo user
- Access to internet
- Fedora 35 server
Table of Contents
- Update the system repositories
- Install memcached
- Configure memcached
- install memcached PHP extension
1. Update Fedora system repositories
To begin our installation we need to make sure all the repositories are up to date.
$ sudo dnf update
After the updates is complete then we can install Memcached.
2. Install Memcached
To begin our installation, type the following command into the terminal to run the installation.
$ sudo dnf install memcached -y
This will run the installation of memcached in your system. Wait for the installation to finish then move on to configuration. It will install dependencies in the process.
3. Configure Memcached
We need to make some configuration in memcached. The default configuration is found in the /etc/ sysconfig/memcached.
$ sudo vim /etc/sysconfig/memcached
The output should look as follows
PORT="11211" USER="memcached" MAXCONN="1024" CACHESIZE="64" OPTIONS="-l 127.0.0.1,::1"
Change the following to suite your needs. After you have completed making any changes save the file and exit then restart your memcached.
$ sudo systemctl restart memcached
As the best practice enable Memcached to start on reboot, use the following command;
$ sudo systemctl enable memcached
To view the status of Memcached do the following in your terminal.
$ sudo systemctl status memcached
Your output should look like this
# sudo systemctl status memcached ● memcached.service - memcached daemon Loaded: loaded (/usr/lib/systemd/system/memcached.service; enabled; vendor preset: disabled) Active: active (running) since Tue 2021-11-16 09:02:47 UTC; 3min 33s ago Main PID: 19179 (memcached) Tasks: 10 (limit: 2319) Memory: 1.6M CPU: 46ms CGroup: /system.slice/memcached.service └─19179 /usr/bin/memcached -p 11211 -u memcached -m 1024 -c 1024 -l 127.0.0.1,::1 Nov 16 09:02:47 fedora systemd: Started memcached daemon.
You can also restart memcached with the following command;
$ sudo /etc/init.d/memcached restart
Restarting Memcached will drop all sessions stored in an instance.
4. Install Memcached PHP Extension
Install the following PHP extension php-pecl-memcached as shown below;
$ sudo dnf search php memcached
The output will be as follows:
Last metadata expiration check: 0:40:53 ago on Tue 16 Nov 2021 09:08:30 AM UTC. ==================================== Name & Summary Matched: memcached, php ===================================== php-pecl-memcached.x86_64 : Extension to work with the Memcached caching daemon php-pecl-memcache.x86_64 : Extension to work with the Memcached caching daemon
So let’s begin the installation with the following command
$ sudo dnf install php-pecl-memcached Installed: fastlz-0.1.0-0.16.20070619svnrev12.fc35.x86_64 libmemcached-awesome-1.1.1-1.fc35.x86_64 php-common-8.0.12-2.fc35.x86_64 php-pecl-igbinary-3.2.5-1.fc35.x86_64 php-pecl-memcached-3.1.5-7.fc35.x86_64 php-pecl-msgpack-2.1.2-4.fc35.x86_64
Now you can restart memcached and Apache for the changes to take effect.
$ sudo systemctl restart memcached $ sudo systemctl restart httpd
Finally you can check the php.ini configuration file to confirm everything.
$ php -i | grep memcached
The output should be as follows;
/etc/php.d/50-memcached.ini memcached memcached support => enabled libmemcached version => 1.1.1 memcached.compression_factor => 1.3 => 1.3 memcached.compression_threshold => 2000 => 2000 memcached.compression_type => fastlz => fastlz memcached.default_binary_protocol => Off => Off memcached.default_connect_timeout => 0 => 0 memcached.default_consistent_hash => Off => Off memcached.serializer => igbinary => igbinary memcached.sess_binary_protocol => On => On memcached.sess_connect_timeout => 0 => 0 memcached.sess_consistent_hash => On => On memcached.sess_consistent_hash_type => ketama => ketama memcached.sess_lock_expire => 0 => 0 memcached.sess_lock_max_wait => not set => not set memcached.sess_lock_retries => 5 => 5 memcached.sess_lock_wait => not set => not set memcached.sess_lock_wait_max => 150 => 150 memcached.sess_lock_wait_min => 150 => 150 memcached.sess_locking => On => On memcached.sess_number_of_replicas => 0 => 0 memcached.sess_persistent => Off => Off memcached.sess_prefix => memc.sess.key. => memc.sess.key. memcached.sess_randomize_replica_read => Off => Off memcached.sess_remove_failed_servers => Off => Off memcached.sess_sasl_password => no value => no value memcached.sess_sasl_username => no value => no value memcached.sess_server_failure_limit => 0 => 0 memcached.store_retry_count => 2 => 2 Registered save handlers => files user memcached
We have learn how to install Memcached in our Fedora server. If in case you encounter problem please consult the documentation.