Drupal Memcache setup

Memcached
Figure 1. The Memcached client library is responsible for sending requests to the correct servers.

Step 1: Application requests keys foo, bar and baz using the client library, which calculates key hash values, determining which Memcached server should receive requests.

Step 2: Memcached client sends parallel requests to all relevant Memcached servers.

Step 3: Memcached servers send responses to the client library.

Step 4: Memcached client library aggregates responses for the application.

Install Memcache with Drupal:

Windows XP:
a. Install the Memcached Service
  1. Download memcached binaries for Win32 from http://jehiah.cz/projects/memcached-win32/
  2. Unzip the binaries in a directory (eg. c:\memcached)
  3. Run the command “c:\memcached\memcached.exe -d install” for installing the service.
  4. Start the server using “c:\memcached\memcached.exe -d start”
  5. Server will be listening to port 11211(default)
b. Install memcahe php extension
  1. Check the php_memcache.dll file is already exists in c:\xampp\php\ext directory. If not download it
  2. Add following line in you php.ini file “extension=php_memcache.dll”
  3. Restart the Web Server
c. Install memcahe drupal module
  1. Put your site in offline
  2. In php.ini set memcache.hash_strategy="consistent".
  3. Download memcache module from http://drupal.org/project/memcache
  4. Edit settings.php by adding following line “$conf['cache_inc'] ='sites/all/modules/memcache/memcache.inc'”
  5. Put your site back online.
Ubuntu Server:
Note :– Need xampp development version to install pecl packages . If you don’t have development package 

a. Install the Memcached Service
  1. Download memcached from following url http://packages.ubuntu.com/km/lucid/i386/memcached/download
  2. Run command “dpkg memcached.deb”OR (“apt-get install memcached”)
b. Install memcahe php extension
  1. Download xampp-linux-devel-1.7.1.tar.gz and copy it to /opt directory
  2. Download the php distribution package (Same version) and put it in includes/php dir
  3. Run the command “./configure” (Make sure configure file have execute permission)
  4. Download memcache pecl extension from http://pecl.php.net/package/memcache
  5. Extract and run “./configure”, “make”, “make test”, “make install” commands
  6. Edit your “/opt/lamp/etc/php.ini” file by adding “extension=memcache.so”
  7. Restart xampp using “/opt/lamp/lamp start”
c. Install memcahe drupal module
  1. Put your site in offline
  2. In php.ini set memcache.hash_strategy="consistent".
  3. Download memcache module from http://drupal.org/project/memcache
  4. Edit settings.php by adding following line “$conf['cache_inc'] ='sites/all/modules/memcache/memcache.inc'”
  5. Put your site back online.

Comments

Post a Comment

Popular posts from this blog

PHP - How to increase size of POST value in php

Problem: PHP/HTML Forms with more the >20 fields(which approx post more the 1000 characters) will end up in error or the posted values will not be received in form action because by default in php  max_input_vars is set to 1000 . Solution:   In this case you can increase the size of  max_input_nesting_level and  max_input_vars in php.ini to resolve. max_input_nesting_level: Sets the max nesting depth of input variables (i.e. $_GET, $_POST.) max_input_vars How many input variables may be accepted (limit is applied to $_GET, $_POST and $_COOKIE superglobal separately). Use of this directive mitigates the possibility of denial of service attacks which use hash collisions. If there are more input variables than specified by this directive, an E_WARNING is issued, and further input variables are truncated from the request.
Read more

D8 KernelEvents constants

Here is a list of KernelEvents constants: KernelEvents::CONTROLLER ; // The CONTROLLER event occurs once a controller was found for handling a request. KernelEvents::EXCEPTION ; // The EXCEPTION event occurs when an uncaught exception appears. KernelEvents::FINISH_REQUEST ; //The FINISH_REQUEST event occurs when a response was generated for a request. KernelEvents::REQUEST ; // The REQUEST event occurs at the very beginning of request dispatching. KernelEvents::RESPONSE ; // The RESPONSE event occurs once a response was created for replying to a request. KernelEvents::TERMINATE ; // The TERMINATE event occurs once a response was sent. KernelEvents::VIEW ; // The VIEW event occurs when the return value of a controller is not a Response instance.
Read more

D8 - Attach file programmatically to a node

Scenario 1: If the file resides on the other server/website. Try the below code, use \Drupal\node\Entity\Node; /** Create file object from remote server/website URL. */ $data = file_get_contents('https://www.example.com/sites/default/files/logo.png'); $file = file_save_data($data, 'public://logo.png', FILE_EXISTS_REPLACE); // Create node object with attached file. $node = Node::create([   'type'        => 'article',   'title'       => 'Sample test',   'field_image' => [     'target_id' => $file->id(),   ], ]); $node->save(); Refer " file_save_data " API for more options/overide functions Scenario 2:  If the file resides on the same server/website. Try the below code, use \Drupal\node\Entity\Node; use \Drupal\file\Entity\File; // Create file object from a locally copied file. $uri  = file_unmanaged_copy('public://source.jpg', 'public://destination.jpg', ...
Read more