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From Carlos Rolo <r...@pythian.com>
Subject Re: Adding nodes to existing cluster
Date Mon, 20 Apr 2015 13:08:18 GMT
Independent of the snitch, data needs to travel to the new nodes (plus all
the keyspace information that goes via gossip). So I won't bootstrap them
all at once, even if it is only for network traffic generated.

Don't forget to run cleanup on the old nodes once all nodes are in place to
reclaim disk space.

Regards,

Carlos Juzarte Rolo
Cassandra Consultant

Pythian - Love your data

rolo@pythian | Twitter: cjrolo | Linkedin: *linkedin.com/in/carlosjuzarterolo
<http://linkedin.com/in/carlosjuzarterolo>*
Mobile: +31 6 159 61 814 | Tel: +1 613 565 8696 x1649
www.pythian.com

On Mon, Apr 20, 2015 at 1:58 PM, Or Sher <or.sher1@gmail.com> wrote:

> Thanks for the response.
> Sure we'll monitor as we're adding nodes.
> We're now using 6 nodes on each DC. (We have 2 DCs)
> Each node contains ~800GB
>
> Do you know how rack configurations are relevant here?
> Do you see any reason to bootstrap them one by one if we're not using
> rack awareness?
>
>
> On Mon, Apr 20, 2015 at 2:49 PM, Carlos Rolo <rolo@pythian.com> wrote:
> > Start one node at a time. Wait 2 minutes before starting each node.
> >
> >
> > How much data and nodes you have already? Depending on that, the
> streaming
> > of data can stress on the resources you have.
> > I would recommend to start one and monitor, if things are ok, add another
> > one. And so on.
> >
> > Regards,
> >
> > Carlos Juzarte Rolo
> > Cassandra Consultant
> >
> > Pythian - Love your data
> >
> > rolo@pythian | Twitter: cjrolo | Linkedin:
> linkedin.com/in/carlosjuzarterolo
> > Mobile: +31 6 159 61 814 | Tel: +1 613 565 8696 x1649
> > www.pythian.com
> >
> > On Mon, Apr 20, 2015 at 11:02 AM, Or Sher <or.sher1@gmail.com> wrote:
> >>
> >> Hi all,
> >> In the near future I'll need to add more than 10 nodes to a 2.0.9
> >> cluster (using vnodes).
> >> I read this documentation on datastax website:
> >>
> >>
> http://docs.datastax.com/en/cassandra/2.0/cassandra/operations/ops_add_node_to_cluster_t.html
> >>
> >> In one point it says:
> >> "If you are using racks, you can safely bootstrap two nodes at a time
> >> when both nodes are on the same rack."
> >>
> >> And in another is says:
> >> "Start Cassandra on each new node. Allow two minutes between node
> >> initializations. You can monitor the startup and data streaming
> >> process using nodetool netstats."
> >>
> >> We're not using racks configuration and from reading this
> >> documentation I'm not really sure is it safe for us to bootstrap all
> >> nodes together (with two minutes between each other).
> >> I really hate the tought of doing it one by one, I assume it will take
> >> more than 6H per node.
> >>
> >> What do you say?
> >> --
> >> Or Sher
> >
> >
> >
> > --
> >
> >
> >
>
>
>
> --
> Or Sher
>

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