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From Romain HARDOUIN <romain.hardo...@urssaf.fr>
Subject RE: cassandra 1.2.5- virtual nodes (num_token) pros/cons?
Date Fri, 26 Jul 2013 15:25:07 GMT
Vnodes are a great feature. More nodes are involved during operations such 
as bootstrap, decommission, etc.
DataStax documentation is definitely a must read.
That said, If I were you, I'd wait somewhat before to shuffle the ring. 
I'd focus on cluster upgrade and monitoring the nodes. (number of files 
handles, memory usage, latency, etc).
Upgrading from 0.8 to 1.2 can be tricky, there are so many changes since 
then. Be careful about compaction strategies you choose and double check 
the options.

Regards,
Romain

rash aroskar <rashmi.aroskar@gmail.com> a écrit sur 25/07/2013 23:25:11 :

> De : rash aroskar <rashmi.aroskar@gmail.com>
> A : user@cassandra.apache.org, 
> Date : 25/07/2013 23:25
> Objet : cassandra 1.2.5- virtual nodes (num_token) pros/cons?
> 
> Hi,
> I am upgrading my cassandra cluster from 0.8 to 1.2.5. 
> In cassandra 1.2.5 the 'num_token' attribute confuses me. 
> I understand that it distributes multiple tokens per node but I am 
> not clear how that is helpful for performance or load balancing. Can
> anyone elaborate? has anyone used this feature  and knows its 
> advantages/disadvantages?
> 
> Thanks,
> Rashmi
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