Memcached¶

sinopsis¶

El aspecto principal de este módulo es instalar y actualizar el memcache con la última versión.

Memcached es un sistema de almacenamiento en caché de memoria distribuida de propósito general. A menudo se utiliza para acelerar sitios web dinámicos con bases de datos de almacenamiento en caché de datos y objetos en la memoria RAM para reducir el número de veces que una fuente de datos externa (como una base de datos o API) debe ser leído.

Veamos sobre el proceso de instalar y utilizar este módulo en los próximos temas.

Ayuda Comando¶

El comando help guía a los usuarios en cuanto a la finalidad y al igual que sobre las opciones que se incluyen en el módulo Memcached. En él se enumeran los parámetros alternativos de módulo Memcached. También describe la sintaxis para instalar el módulo de Memcached. El comando de ayuda para el módulo de Memcached es como se muestra.

ptconfigure Memcached help

La sintaxis para declarar el comando de ayuda no es sensible a mayúsculas, que es una ventaja añadida. La siguiente captura de pantalla a visualizar sobre el comando de ayuda bajo Memcached.

kevell@corp:/# ptconfigure Memcached help

******************************


 This command allows you to update Memcached.

 Memcached, memcached

       - install
       Installs the latest version of memcache
       example: ptconfigure memcached install

------------------------------
End Help
******************************

instalación¶

El comando utilizado para instalar el Memcached en la máquina de los usuarios se muestra a continuación:

ptconfigure memcached install

Después de introducir el comando anterior, el siguiente proceso se produce como se muestra en el formato tabular.

Parámetros	Parámetro Alternativa	Opciones	Comentarios
Install Memcached? (Y/N)	En lugar de memcached, podemos usar Memcached también.	Y(Yes)	Si el usuario desea continuar el proceso de instalación se puede introducir como Y.
Install Memcached? (Y/N)	En lugar de memcached, podemos usar Memcached también.	N(No)	Si el usuario desea abandonar el proceso de instalación se puede introducir como N.\|

La siguiente captura de pantalla puede darle una representación pictórica sobre el proceso de instalación.

kevell@corp:/# ptconfigure memcached install
Install Memcached? (Y/N)
y
*******************************
*        Pharaoh Tools        *
*         Memcached!        *
*******************************
Creating /tmp/ptconfigure-temp-script-43944931598.sh
chmod 755 /tmp/ptconfigure-temp-script-43944931598.sh 2>/dev/null
Changing /tmp/ptconfigure-temp-script-43944931598.sh Permissions
Executing /tmp/ptconfigure-temp-script-43944931598.sh
Ign http://dl.google.com stable InRelease
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Fetched 7,633 kB in 2min 57s (43.1 kB/s)
Temp File /tmp/ptconfigure-temp-script-43944931598.sh Removed
Reading package lists...
Building dependency tree...
Reading state information...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
mysql-server-5.5 : Depends: mysql-client-5.5 (>= 5.5.41-0ubuntu0.14.04.1)
[Pharaoh Logging] Adding Package mysql-server-5.5 from the Packager Apt did not execute correctly
[Pharaoh Logging] Package mysql-server from the Packager Apt is already installed, so not installing
[Pharaoh Logging] Package php5-mysql from the Packager Apt is already installed, so not installing
[Pharaoh Logging] Package php5 from the Packager Apt is already installed, so not installing
Reading package lists...
Building dependency tree...
Reading state information...
The following packages were automatically installed and are no longer required:
  java-wrappers libjargs-java pear-channels php5-xdebug
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  php-pear
Suggested packages:
 php5-dev
The following NEW packages will be installed:
 php-pear php5-memcached
0 upgraded, 2 newly installed, 0 to remove and 34 not upgraded.
Need to get 0 B/307 kB of archives.
After this operation, 2,475 kB of additional disk space will be used.
Selecting previously unselected package php-pear.
(Reading database ... 362745 files and directories currently installed.)
Preparing to unpack .../php-pear_5.5.9+dfsg-1ubuntu4.7_all.deb ...
Unpacking php-pear (5.5.9+dfsg-1ubuntu4.7) ...
Selecting previously unselected package php5-memcached.
Preparing to unpack .../php5-memcached_2.1.0-6build1_amd64.deb ...
Unpacking php5-memcached (2.1.0-6build1) ...
Processing triggers for doc-base (0.10.5) ...
Processing 1 added doc-base file...
Setting up php-pear (5.5.9+dfsg-1ubuntu4.7) ...
Setting up php5-memcached (2.1.0-6build1) ...
[Pharaoh Logging] Adding Package php5-memcached from the Packager Apt executed correctly
Reading package lists...
Building dependency tree...
Reading state information...
The following packages were automatically installed and are no longer required:
 java-wrappers libjargs-java pear-channels php5-xdebug
Use 'apt-get autoremove' to remove them.
Suggested packages:
 libcache-memcached-perl libmemcached
The following NEW packages will be installed:
 memcached
0 upgraded, 1 newly installed, 0 to remove and 34 not upgraded.
Need to get 66.7 kB of archives.
After this operation, 229 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu/ trusty/main memcached amd64 1.4.14-0ubuntu9 [66.7 kB]
Fetched 66.7 kB in 2s (24.0 kB/s)
Selecting previously unselected package memcached.
(Reading database ... 362947 files and directories currently installed.)
Preparing to unpack .../memcached_1.4.14-0ubuntu9_amd64.deb ...
Unpacking memcached (1.4.14-0ubuntu9) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Processing triggers for ureadahead (0.100.0-16) ...
Setting up memcached (1.4.14-0ubuntu9) ...
Starting memcached: memcached.
Processing triggers for ureadahead (0.100.0-16) ...
[Pharaoh Logging] Adding Package memcached from the Packager Apt executed correctly
... All done!
*******************************
Thanks for installing , visit www.pharaohtools.com for more
******************************


Single App Installer:
--------------------------------------------
Memcached: Success
------------------------------
Installer Finished
******************************

Funciones de memcached¶

Durante el uso de la memcached, el proceso puede leer y poner en práctica las siguientes funciones que se incluyen en memcached,

Memcache :: añadir –add un elemento para el servidor
Memcache :: addServer –add un servidor memcached al pool de conexiones
Memcache :: close –Close conexión de servidor memcached
Memcache :: connect –open conexión de servidor memcached
Valor Memcache :: decremento del artículo –Decrement
Memcache :: suprimir el punto –delete del servidor
Memcache :: vaciar –flush todos los elementos existentes en el servidor
Memcache :: get artículo –retrieve del servidor
Memcache :: getExtendedStats –get estadísticas de todos los servidores en la piscina
Memcache :: estado del servidor GetServerStatus –Returns
Memcache :: getStats –get estadísticas del servidor
Memcache :: getVersion –Vuelva la versión del servidor
Valor Memcache :: incremento –Increment el objeto:
Conexión persistente Memcache :: pconnect –open servidor memcached
Memcache :: replace valor –replace del elemento existente
Memcache :: set de datos –Store en el servidor
Memcache :: setCompressThreshold compresión –enable automática de los valores grandes
Parámetros Memcache :: setServerParams –Changes servidor y el estado en tiempo de ejecución

Beneficios¶

Los parámetros utilizados en la ayuda y la instalación no son sensibles, que es una ventaja añadida, mientras que en comparación con otros.
Es-acomodados tanto en Ubuntu y así como Cent OS.
Este módulo se instala el memcached en versión actualizada.
Si el módulo ya existe en la máquina del usuario, se mostrará un mensaje, ya que ya existe.