How does an event such as a crash of one of the memcached servers handled by the memcached client?
There is no automatic handling of this. If your client fails to get a response from a server then it should fall back to loading the data from the MySQL database. The client APIs all provide the ability to add and remove memcached instances on the fly. If within your application you notice that memcached server is no longer responding, your can remove the server from the list of servers, and keys will automatically be redistributed to another memcached server in the list. If retaining the cache content on all your servers is important, make sure you use an API that supports a consistent hashing algorithm. For more information, see Section 14.5.2.4, “memcached Distribution Types”.
There is no automatic handling of this. If your client fails to get a response from a server then it should fall back to loading the data from the MySQL database. The client APIs all provide the ability to add and remove memcached instances on the fly. If within your application you notice that memcached server is no longer responding, your can remove the server from the list of servers, and keys will automatically be redistributed to another memcached server in the list. If retaining the cache content on all your servers is important, make sure you use an API that supports a consistent hashing algorithm. For more information, see Section 4.2.4, “memcached Distribution Types”.
