Wow, that makes it sound pretty easy!
Dmitry Serebrennikov's List: Replication of Distributed Caches
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Basically, the only change that needs to be done is that you have MySQL trigger the delete from memcached on replication. All your slave database gets an updated record for you, saves it in its tables and then hits memcached with a delete command for that key. While it does mean diving into the MySQL code, when you get to the size at which you need such a feature, you can just hire a MySQL expert.
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If you have an active-passive failover with heartbeat, you can write a very simple memcache script on the passive node to poll the active node's memcache and keep a hot copy of it. This is the simplest replication you can do.
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Nice and simple
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In a lot of case (assuming you are not writing Facebook) a RDMS is fast enough for caching. Just create a table that has a key and a blob column. If the RDBS server has enough ram, all the data will be in RAM and just saved to disk so as to allow recovery.
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Wow. Use database to cache access to a database.
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Distributed caches can be used to facility app server loadbalancing without loosing transient state. However, this requires that the the caches themselves not become single points of failure. Which leads to the need for replication of state between multiple instances of the distributed caches. Thi...
Updated on Apr 02, 09
Created on Apr 02, 09
Category: Computers & Internet
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