Thanks to All, In a web farm where two memcached server is hosted separately, when one server is down could all request served from server 2 automatically or we need to remove the dead node explicitly from the client?
I have tested a scenario: Key1, Data1 Cached on Server1 Key2, Data2 Cached on Server2 If Server1 dead, than data would get from database NOT from the Server2, (The defualt behaviour should be, if Key1 not found in Server1 OR server not respond than client should check Server2 for the data correspond to Key1 and if not found then store that data on Server2 so that in next request it would fetch from Server2. As dormando said: "standby server to take over the IP of a dead host, or make it easy to push an update to your server list." if i update the server list manually doesn't it effect the cache?
