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From VĂ­ctor Hugo Oliveira Molinar <vhmoli...@gmail.com>
Subject Re: initial_token
Date Fri, 01 Feb 2013 17:55:49 GMT
Do not set initial_token when using murmur3partitioner.
instead, set num_tokens.

For example, u have 3 hosts with the same hardware setup, then, for each
one set the same num_tokens.
But now consider adding another better host, this time i'd suggest you to
set previous num_tokens * 2.

num_tokens: 128 (worse machines)
num_tokens: 256(twice better machine)

This is the setup of virtual nodes.
Check current datastax docs for it.


On Thu, Jan 31, 2013 at 8:43 PM, Edward Capriolo <edlinuxguru@gmail.com>wrote:

> This is the bad side of changing default. There are going to be a few
> groups unfortunates.
>
> The first group, who only can not setup their cluster, and eventually
> figure out their tokens. (this thread)
> The second group, who assume their tokens were correct and run around
> with an unbalanced cluster thinking the performance sucks. (the
> threads for the next few months)
> The third group, who will google "how to balance my ring" and find a
> page with random partitioner instructions. (the occasional thread for
> the next N years)
> The fourth group, because as of now map reduce is highly confused by this.
>
> On Thu, Jan 31, 2013 at 4:52 PM, Rob Coli <rcoli@palominodb.com> wrote:
> > On Thu, Jan 31, 2013 at 12:17 PM, Edward Capriolo <edlinuxguru@gmail.com>
> wrote:
> >> Now by default a new partitioner is chosen Murmer3.
> >
> > "Now" = as of 1.2, to be unambiguous.
> >
> > =Rob
> >
> > --
> > =Robert Coli
> > AIM&GTALK - rcoli@palominodb.com
> > YAHOO - rcoli.palominob
> > SKYPE - rcoli_palominodb
>

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