Also send reads to the master when load_from_slaves is '2'.

Author: colinmollenhour

Cm/Cache/Backend/Redis.php

@@ -210,13 +210,16 @@ public function __construct($options = array())
             if ( ! empty($options['load_from_slaves'])) {
                 $slaves = $sentinel->getSlaveClients($sentinelMaster);
                 if ($slaves) {
+                    if ($options['load_from_slaves'] == 2) {
+                        array_push($slaves, $this->_redis); // Also send reads to the master
+                    }
                     if ($slaveSelect) {
                         $slave = $slaveSelect($slaves, $this->_redis);
                     } else {
                         $slaveKey = array_rand($slaves, 1);
                         $slave = $slaves[$slaveKey]; /* @var $slave Credis_Client */
                     }
-                    if ($slave instanceof Credis_Client) {
+                    if ($slave instanceof Credis_Client && $slave != $this->_redis) {
                         try {
                             $this->_applyClientOptions($slave, TRUE);
                             $this->_slave = $slave;

README.md

@@ -82,6 +82,7 @@ You may achieve high availability and load balancing using [Redis Sentinel](http
 specified should be a comma-separated list of Sentinel servers and the `sentinel_master` option should be specified
 to indicate the name of the sentinel master set (e.g. 'mymaster'). If using `sentinel_master` you may also specify
 `load_from_slaves` in which case a random slave will be chosen for performing reads in order to load balance across multiple Redis instances.
+Using the value '1' indicates to only load from slaves and '2' to include the master in the random read slave selection.
 
 Example configuration: