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From Colin Clark <co...@clark.ws>
Subject Re: Adding nodes to existing cluster
Date Mon, 20 Apr 2015 13:10:23 GMT
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> On Apr 20, 2015, at 8:08 AM, Carlos Rolo <rolo@pythian.com> wrote:
> 
> 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 <http://www.pythian.com/>
> On Mon, Apr 20, 2015 at 1:58 PM, Or Sher <or.sher1@gmail.com <mailto: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 <mailto: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 <http://linkedin.com/in/carlosjuzarterolo>
> > Mobile: +31 6 159 61 814 <tel:%2B31%206%20159%2061%20814> | Tel: +1 613 565
8696 x1649 <tel:%2B1%20613%20565%208696%20x1649>
> > www.pythian.com <http://www.pythian.com/>
> >
> > On Mon, Apr 20, 2015 at 11:02 AM, Or Sher <or.sher1@gmail.com <mailto: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
<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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