Re: RandomPartitioner and new token allocation algorithm

2016-02-10 Thread Brice Dutheil
Yes, at the moment it is not possible to switch from Random to Murmur. We were interested to move to Murmur. And we looked if it was possible when migrating the keyspaces to another datacenter. However this is not possible even while the new datacenter didn’t have the same number of nodes. -- Bri

Re: RandomPartitioner and new token allocation algorithm

2016-02-10 Thread Russell Hatch
(forgot to mention, if there's more to add, please move this over to the standard cassandra mailing list -- this list is used for development of cassandra itself). RandomPartitioner will probably be there for a long time for backwards compat, and if it goes away (unlikely) there would certainly be

Re: RandomPartitioner and new token allocation algorithm

2016-02-10 Thread Romain Hardouin
We have running clusters which use RandomPartitioner that's why I wonder if we could use this feature in the future. Best, Romain

Re: RandomPartitioner and new token allocation algorithm

2016-02-10 Thread Russell Hatch
RandomPartitioner is included for backwards compatibility, though not suggested for new projects. As far as I know Murmur is faster and offers less hotspots in token allocation. Cheers, Russ On Wed, Feb 10, 2016 at 10:04 AM, Romain Hardouin wrote: > Hi all, > > cassandra.yaml mentions that the

RandomPartitioner and new token allocation algorithm

2016-02-10 Thread Romain Hardouin
Hi all, cassandra.yaml mentions that the new token allocation algorithm is only supported with the Murmur3Partitioner [1]. When looking at the commit [2] I see that IPartitioner interface is used. I do see references to Murmur3Partitioner but only in tests classes. What would prevent to use Rand

Re: Statistics.db file in Cassandra 3.0

2016-02-10 Thread Tyler Hobbs
Take a look at MetadataSerializer and the MetadataComponent subclasses. On Tue, Feb 9, 2016 at 4:34 PM, Rajath Subramanyam wrote: > Hello Cassandra-Dev, > > I have noticed that in Cassandra 3.0 there is a new file in the > // called > ma--big-Statistics.db. > > What does this file contain ? Is i