[ https://issues.apache.org/jira/browse/CASSANDRA-2975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Pavel Yaskevich updated CASSANDRA-2975: --------------------------------------- Attachment: CASSANDRA-2975-v2-additions.patch +1 with following nit - LazilyCompactedRowTest modifications are redundant and my additions patch which adds "clear()" method to the Filter class and fixes problem in the LongBloomFilterTest. > Upgrade MurmurHash to version 3 > ------------------------------- > > Key: CASSANDRA-2975 > URL: https://issues.apache.org/jira/browse/CASSANDRA-2975 > Project: Cassandra > Issue Type: Improvement > Components: Core > Reporter: Brian Lindauer > Assignee: Vijay > Priority: Trivial > Labels: lhf > Fix For: 1.2 > > Attachments: 0001-CASSANDRA-2975-v2.patch, 0001-CASSANDRA-2975.patch, > 0001-Convert-BloomFilter-to-use-MurmurHash-v3-instead-of-.patch, > 0002-Backwards-compatibility-with-files-using-Murmur2-blo.patch, > CASSANDRA-2975-v2-additions.patch, Murmur3Benchmark.java > > > 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira