Dne 7.10.2011 23:16, Mohit Anchlia napsal(a):
You'll see output like:
Offset SSTables
1 8021
2 783
Which means 783 read operations accessed 2 SSTables
thank you for explaining it to me. I see this:
Offset SSTables
1 59323
2 857
3 56
it means bloom filter failure ratio over 1%. Cassandra in unit tests
expects bloom filter false positive less than 1.05%. HBase has
configurable bloom filters. You can choose 1% or 0.5% - it can make
difference for large cache.
But result is that my poor read performance should not be caused by
bloom filters.