If you are planning on using murmur3 without vnodes (specifying your own tokens) there is a quick python script in the datastax docs you can use to generate balanced tokens.
http://www.datastax.com/docs/1.2/initialize/token_generation#calculating-tokens-for-the-murmur3partitioner On Fri, Jan 4, 2013 at 10:53 AM, Michael Kjellman <mkjell...@barracuda.com>wrote: > To be honest I haven't run a cluster with Murmur3. > > You can still use indexing with RandomPartitioner (all us "old" folk are > stuck on Random btw..) > > And there was a thread floating around yesterday where Edward did some > benchmarks and found that Murmur3 was actually slower than > RandomPartitioner. > > http://www.mail-archive.com/user@cassandra.apache.org/msg26789.html<http://permalink.gmane.org/gmane.comp.db.cassandra.user/30182> > > I do know that with vnodes token allocation is now 100% dynamic so no need > to manually assign tokens to nodes anymore. > > Best, > michael > > From: Dwight Smith <dwight.sm...@genesyslab.com> > Reply-To: "user@cassandra.apache.org" <user@cassandra.apache.org> > Date: Friday, January 4, 2013 8:48 AM > To: "'user@cassandra.apache.org'" <user@cassandra.apache.org> > Subject: RE: Specifying initial token in 1.2 fails > > Michael**** > > ** ** > > Yes indeed – my mistake. Thanks. I can specify RandomPartitioner, since > I do not use indexing – yet.**** > > ** ** > > Just for informational purposes – with Murmur3 - to achieve a balanced > cluster – is the initial token method supported?**** > > If so – how should these be generated, the token-generator seems to only > apply to RandomPartitioner.**** > > ** ** > > Thanks again**** > > ** ** > > *From:* Michael Kjellman > [mailto:mkjell...@barracuda.com<mkjell...@barracuda.com>] > > *Sent:* Friday, January 04, 2013 8:39 AM > *To:* user@cassandra.apache.org > *Subject:* Re: Specifying initial token in 1.2 fails**** > > ** ** > > Murmur3 != MD5 (RandomPartitioner)**** > > ** ** > > *From: *Dwight Smith <dwight.sm...@genesyslab.com> > *Reply-To: *"user@cassandra.apache.org" <user@cassandra.apache.org> > *Date: *Friday, January 4, 2013 8:36 AM > *To: *"'user@cassandra.apache.org'" <user@cassandra.apache.org> > *Subject: *Specifying initial token in 1.2 fails**** > > ** ** > > Hi**** > > **** > > Just started evaluating 1.2 – starting a clean Cassandra node – the usual > practice is to specify the initial token – but when I attempt to start the > node the following is observed:**** > > **** > > INFO [main] 2013-01-03 14:08:57,774 DatabaseDescriptor.java (line 203) > disk_failure_policy is stop**** > > DEBUG [main] 2013-01-03 14:08:57,774 DatabaseDescriptor.java (line 205) > page_cache_hinting is false**** > > INFO [main] 2013-01-03 14:08:57,774 DatabaseDescriptor.java (line 266) > Global memtable threshold is enabled at 339MB**** > > DEBUG [main] 2013-01-03 14:08:58,008 DatabaseDescriptor.java (line 381) > setting auto_bootstrap to true**** > > ERROR [main] 2013-01-03 14:08:58,024 DatabaseDescriptor.java (line 495) > Fatal configuration error**** > > org.apache.cassandra.exceptions.ConfigurationException: For input string: > "85070591730234615865843651857942052863"**** > > at > org.apache.cassandra.dht.Murmur3Partitioner$1.validate(Murmur3Partitioner.java:180) > **** > > at > org.apache.cassandra.config.DatabaseDescriptor.loadYaml(DatabaseDescriptor.java:433) > **** > > at > org.apache.cassandra.config.DatabaseDescriptor.<clinit>(DatabaseDescriptor.java:121) > **** > > at > org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:178) > **** > > at > org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:397) > **** > > at > org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:440) > **** > > **** > > **** > > This looks like a bug.**** > > **** > > Thanks**** > > **** > > **** > > ** ** > > ---------------------------------- > Join Barracuda Networks in the fight against hunger. > To learn how you can help in your community, please visit: > http://on.fb.me/UAdL4f **** > > **** > > ---------------------------------- > Join Barracuda Networks in the fight against hunger. > To learn how you can help in your community, please visit: > http://on.fb.me/UAdL4f > >
