Hi Frederic, On Fri, Mar 21, 2014 at 11:30 AM, Frédéric Dooremont <frederic.doorem...@univ-littoral.fr> wrote: > > Hi all, > > We have upgraded OAE to 5.0 with cassandra 1.2.15 but we had to configure > partitioner to the cassandra 1.1 default of > org.apache.cassandra.dht.RandomPartitioner. > Is it advised to use org.apache.cassandra.dht.Murmur3Partitioner as > partitioner? If this is the case, how do we migrate the data?
Cassandra 1.2 I believe introduced the Murmur3 partitioner, and it recommends using that one at least for new clusters. Using one or the other won't impact OAE, it should only impact Cassandra. That means that you can do what suits your deployment best. Their documentation states that the Murmur3 partitioner introduces a "faster" md5 hash of the keys with no degradation on distribution, that's good! Whether "fast" means better hash latency, CPU usage or both I haven't dug that deep. You'll need to determine if the speed benefit is worth a migration of your data though. We run Cassandra 1.2.10 and use the 1.1 RandomPartitioner. We don't have any plans at this point to migrate. It might come into consideration if our 3 node cluster starts getting close to being stressed. > Is cassandra 2 supported by OAE 5.0? We haven't tested it, but the CQL3 migration in 5.0 means that we'll be better suited to jump to later versions of 2.X. We'd welcome any testing you guys are able to do on Cassandra 2.0, as there is no longer any reason to believe that we wouldn't be compatible. I think we are due for an upgrade from 1.2.10, but wanted to wait for DataStax versions to surpass that Cassandra version and let other Cassandra users get production experience there first. Thanks, Branden > > kind regards > Jean-François Florent et Frederic > _______________________________________________ > oae-dev mailing list > oae-dev@collab.sakaiproject.org > http://collab.sakaiproject.org/mailman/listinfo/oae-dev _______________________________________________ oae-dev mailing list oae-dev@collab.sakaiproject.org http://collab.sakaiproject.org/mailman/listinfo/oae-dev
