Upgrade MurmurHash to version 3
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Key: CASSANDRA-2975
URL: https://issues.apache.org/jira/browse/CASSANDRA-2975
Project: Cassandra
Issue Type: Improvement
Components: Core
Affects Versions: 0.8.3
Reporter: Brian Lindauer
Priority: Trivial
MurmurHash version 3 was finalized on June 3. It provides an enormous speedup
and increased robustness over version 2, which is implemented in Cassandra.
Information here:
http://code.google.com/p/smhasher/
The reference implementation is here:
http://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp?spec=svn136&r=136
I have already done the work to port the (public domain) reference
implementation to Java in the MurmurHash class and updated the BloomFilter
class to use the new implementation:
https://github.com/lindauer/cassandra/commit/cea6068a4a3e5d7d9509335394f9ef3350d37e93
Apart from the faster hash time, the new version only requires one call to
hash() rather than 2, since it returns 128 bits of hash instead of 64.
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