But I don't really get the point of starting a new cluster without vnodes... Is there some disadvantage using vnodes ?
Alain 2013/1/4 Nick Bailey <n...@datastax.com> > 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 >> >> > >
