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Memcached Meets Flash
Posted by: Edwin DeSouza
Date: April 22, 2009 04:57PM

memcached is a key ingredient in any major Web 2.0 site to offload the database by handling the read-load. Up till now you had to fork memcached if you wanted to use a different backend to store the items (e.g., Tugela cache use BDB). We are currently working on adapting something similar to the MySQL storage engine design, by creating a plugable engine interface in Memcached.
Memcached Meets Flash

The ideal memcached server is the one with the lowest price per GB of memory. The introduction of Flash memory and SSD in commodity hardware, opens new possibilities. I have been experimenting with a hybrid memcached engine, utilizing RAM and Flash memory. This engine would be ideal where you need fast access time for the frequently most used items (they are stored in RAM), but can accept slightly higher latency for other items (stored in flash).

This talk will cover the following topics:
- What the storage interface is
- Why we created it
- What it may be used for
- How this allows us to create a hybrid caching model by utilizing RAM and Flash memory.

Slides:
http://blogs.sun.com/trond/resource/MySQL_UC-09/Memcached_meet_flash.pdf

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