Re: Adding a new node with the double of disk space

You'd use different num_tokens only if you wanted an imbalance (e.g. New hardware specs where you wanted to use fewer, larger machines). -- Jeff Jirsa > On Aug 19, 2017, at 6:04 PM, Subroto Barua > wrote: > > Jeff, > > is it ok to have different values of

Re: RE: Adding a new node with the double of disk space

Jeff, is it ok to have different values of num_tokens per node in a cluster? won't it create cluster imbalance? or it better to initiate it on a separate DC? Subroto On Friday, August 18, 2017, 5:34:11 AM PDT, Durity, Sean R wrote: #yiv5432100827 #yiv5432100827 --

RE: Adding a new node with the double of disk space

I am doing some on-the-job-learning on this newer feature of the 3.x line, where the token generation algorithm will compensate for different size nodes in a cluster. In fact, it is one of the main reasons I upgraded to 3.0.13, because I have a number of original nodes in a cluster that are

Re: Adding a new node with the double of disk space

I would preferably spin 2 JVMs inside the same hardware (if you double everything) than having to deal with what Jeff stated. Also certain operations are not really found of a large number of vnodes (eg. repair). There was a lot of improvements in the 3.x release cycle, but I do still tend to

Re: Adding a new node with the double of disk space

If you really double the hardware in every way, it's PROBABLY reasonable to double num_tokens. It won't be quite the same as doubling all-the-things, because you still have a single JVM, and you'll still have to deal with GC as you're now reading twice as much and generating twice as much garbage,

Re: Adding a new node with the double of disk space

Are you saying if a node had double the hardware capacity in every way it would be a bad idea to up num_tokens? I thought that was the whole idea of that setting though? On Thu, Aug 17, 2017 at 9:52 AM, Carlos Rolo wrote: > No. > > If you would double all the hardware on that

Re: Adding a new node with the double of disk space

No. If you would double all the hardware on that node vs the others would still be a bad idea. Keep the cluster uniform vnodes wise. Regards, Carlos Juzarte Rolo Cassandra Consultant / Datastax Certified Architect / Cassandra MVP Pythian - Love your data rolo@pythian | Twitter: @cjrolo |