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From Radim Kolar <>
Subject Re: random keys and overlapping key ranges in SSTables
Date Sat, 31 Dec 2011 10:22:04 GMT

> Then for each read, Cassandra will go through all the SSTables (or
> one SSTable in each level for the leveled compaction strategy)? How to deal with this
> problem?
bloom filters can guess right sstables to be read with high probability 
< 0.1%. In reality even if you are using size based compaction and have 
about 300 sstables, reading is fast unless there is row fragmentation 
and you are reading entire row.

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