CiviCRM Community Forums (archive)

I'm using one instance of memcache for multiple civicrm installs on the same machine.

I saw that should have been fixed as part of CRM-5633: "enable prefix support so multiple installs can share same memcache"
but it is not working. I couldn't find a way to set a prefix for memcache so that the keys don't overlap for multiple installs.

Thanks
Casti

I put in a simple work around by defining a config in civicrm.setting.php called MEMCACHE_PREFIX, which can be unique by install.
I modified Memcache.php class:

    function __construct( $host      = 'localhost',
                          $port      = 11211,
                          $timeout   = 3600 ) {
        $this->_host    = $host;
        $this->_port    = $port;
        $this->_timeout = $timeout;
       
        $this->_cache = new Memcache( );
       
        if ( ! $this->_cache->connect( $this->_host, $this->_port ) ) {
            // dont use fatal here since we can go in an infinite loop
            echo 'Could not connect to Memcached server';
            CRM_Utils_System::civiExit( );
        }

      $this->_prefix = defined( 'MEMCACHE_PREFIX' ) ? MEMCACHE_PREFIX : '';
    }

    function set( $key, &$value ) {
      $key = $this->_prefix."_".$key;
        if ( ! $this->_cache->set( $key, $value, false, $this->_timeout ) ) {
            return false;
        }
        return true;
    }

    function &get( $key ) {
      $key = $this->_prefix."_".$key;
        $result =& $this->_cache->get( $key );
        return $result;
    }

    function delete( $key ) {
      $key = $this->_prefix."_".$key;
        return $this->_cache->delete( $key );
    }