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 reduce vnodes number and not increase. Regards, Carlos Juzarte Rolo Cassandra Consultant / Datastax Certified Architect / Cassandra MVP Pythian - Love your data rolo@pythian | Twitter: @cjrolo | Skype: cjr2k3 | Linkedin: *linkedin.com/in/carlosjuzarterolo <http://linkedin.com/in/carlosjuzarterolo>* Mobile: +351 918 918 100 www.pythian.com On Thu, Aug 17, 2017 at 9:19 PM, Jeff Jirsa <jji...@gmail.com> wrote: > 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, but you can probably adjust the tuning of the heap to > compensate. > > > > On Thu, Aug 17, 2017 at 1:00 PM, Kevin O'Connor <ke...@reddit.com.invalid> > wrote: > >> 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 <r...@pythian.com> wrote: >> >>> 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 | Skype: cjr2k3 | Linkedin: >>> *linkedin.com/in/carlosjuzarterolo >>> <http://linkedin.com/in/carlosjuzarterolo>* >>> Mobile: +351 918 918 100 <+351%20918%20918%20100> >>> www.pythian.com >>> >>> On Thu, Aug 17, 2017 at 5:47 PM, Cogumelos Maravilha < >>> cogumelosmaravi...@sapo.pt> wrote: >>> >>>> Hi all, >>>> >>>> I need to add a new node to my cluster but this time the new node will >>>> have the double of disk space comparing to the other nodes. >>>> >>>> I'm using the default vnodes (num_tokens: 256). To fully use the disk >>>> space in the new node I just have to configure num_tokens: 512? >>>> >>>> Thanks in advance. >>>> >>>> >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org >>>> For additional commands, e-mail: user-h...@cassandra.apache.org >>>> >>>> >>> >>> -- >>> >>> >>> >>> >> > -- --
