Good idea Jeff. I can add that in if you like? Do we have a ticket for it or should I just raise one?
On Mon, 6 May 2019 at 03:49, Jeff Jirsa <jji...@gmail.com> wrote: > Picking an ideal allocation for N seed nodes and M vnodes per seed is > probably something we should add as a little python script or similar in > /tools/ to make this easier. Then let the auto allocation stuff kick in > after that. > > > > On May 5, 2019, at 8:23 AM, Jon Haddad <j...@jonhaddad.com> wrote: > > > > I mean you'd want to set up the initial tokens for the first 3 nodes > > of your cluster, which are usually the seed nodes. > > > > > > On Sat, May 4, 2019 at 8:31 PM onmstester onmstester > > <onmstes...@zoho.com.invalid> wrote: > >> > >> So do you mean setting tokens for only one node (one of the seed node) > is fair enough? > >> I can not see any problem with this mechanism (only one manual token > assignment at cluster set up), but the article was also trying to set up a > balanced cluster and the way that it insist on doing manual token > assignment for multiple seed nodes, confused me. > >> > >> Sent using Zoho Mail > >> > >> > >> > >> ============ Forwarded message ============ > >> From: Jon Haddad <j...@jonhaddad.com> > >> To: <user@cassandra.apache.org> > >> Date: Sat, 04 May 2019 22:10:39 +0430 > >> Subject: Re: How to set up a cluster with allocate_tokens_for_keyspace? > >> ============ Forwarded message ============ > >> > >> That line is only relevant for when you're starting your cluster and > >> you need to define your initial tokens in a non-random way. Random > >> token distribution doesn't work very well when you only use 4 tokens. > >> > >> Once you get the cluster set up you don't need to specify tokens > >> anymore, you can just use allocate_tokens_for_keyspace. > >> > >> On Sat, May 4, 2019 at 2:14 AM onmstester onmstester > >> <onmstes...@zoho.com.invalid> wrote: > >>> > >>> I just read this article by tlp: > >>> > https://thelastpickle.com/blog/2019/02/21/set-up-a-cluster-with-even-token-distribution.html > >>> > >>> Noticed that: > >>>>> We will need to set the tokens for the seed nodes in each rack > manually. This is to prevent each node from randomly calculating its own > token ranges > >>> > >>> But until now, i was using this recommendation to setup a new cluster: > >>>>> > >>> > >>> You'll want to set them explicitly using: python -c 'print( > [str(((2**64 / 4) * i) - 2**63) for i in range(4)])' > >>> > >>> > >>> After you fire up the first seed, create a keyspace using RF=3 (or > whatever you're planning on using) and set allocate_tokens_for_keyspace to > that keyspace in your config, and join the rest of the nodes. That gives > even > >>> distribution. > >>> > >>> I've defined plenty of racks in my cluster (and only 3 seed nodes), > should i have a seed node per rack and use initial_token for all of the > seed nodes or just one seed node with inital_token would be ok? > >>> > >>> Best Regards > >>> > >>> > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > >> For additional commands, e-mail: user-h...@cassandra.apache.org > >> > >> > >> > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > > For additional commands, e-mail: user-h...@cassandra.apache.org > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > For additional commands, e-mail: user-h...@cassandra.apache.org > >
