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From David Boxenhorn <>
Subject Using mySQL to emulate Cassandra
Date Sun, 28 Nov 2010 08:28:54 GMT
As our launch date approaches, I am getting increasingly nervous about
Cassandra tuning. It is a mysterious black art that I haven't mastered even
at the low usages that we have now. I know of a few more things I can do to
improve things, but how will I know if it is enough? All this is
particularly ironic since - as we are just starting out - we don't have
scalability problems yet, though we hope to!

Luckily, I have completely wrapped Cassandra in an entity mapper, so that I
can easily trade in something else, perhaps temporarily, until we really
need Cassandra's scalability.

So, I'm thinking of emulating Cassandra with mySQL. I would use mySQL either
as a simple key-value store, without joins, or map Cassandra supercolumns to
mySQL columns, probably of type CLOB.

Does anyone want to talk me out of this?

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