You will need two instances of memcached running. On my mac (linux should be the same) you can start two by doing: memcached -p 11211 & memcached -p 11210 & In a shell, run echo stats | nc 127.0.0.1 11210|grep cmd_flush and echo stats | nc 127.0.0.1 11211|grep cmd_flush and note the results for each Create a new memcache caching instance Add the name LocalMemcache and Server "localhost:11211" Save with all the remaining default settings. Add the LocalMemcache store to the Language string cache Click purge next to the new LocalMemcache cache. In a shell, run echo stats | nc 127.0.0.1 11211|grep cmd_flush and echo stats | nc 127.0.0.1 11210|grep cmd_flush and note the results for each. We expect the numbers returned (when compared to the respective values in step 1) to have gone up for the first one, and not changed for the second one. Go in and edit the LocalMemcache. Under Additional servers to purge, add "127.0.0.1:11210" Save Click purge next to the new LocalMemcache cache. In a shell, run echo stats | nc 127.0.0.1 11211|grep cmd_flush and echo stats | nc 127.0.0.1 11210|grep cmd_flush and note the results for each. We expect both respective values returned to have increased when compared to step 7.