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From David Strauss <da...@fourkitchens.com>
Subject Re: bloom filter
Date Fri, 07 May 2010 10:58:40 GMT
On 2010-05-07 10:55, Peter Schüller wrote:
>> what is the benefit of creating bloom filter when cassandra writes data, how
>> does it helps ?
> 
> It allows Cassandra to answer requests for non-existent keys without
> going to disk, except in cases where the bloom filter gives a false
> positive.
> 
> See:
> 
> http://spyced.blogspot.com/2009/01/all-you-ever-wanted-to-know-about.html

It is also important for identifying which SSTable files to look inside
even when a key is present.

-- 
David Strauss
   | david@fourkitchens.com
Four Kitchens
   | http://fourkitchens.com
   | +1 512 454 6659 [office]
   | +1 512 870 8453 [direct]


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