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From aaron morton <aa...@thelastpickle.com>
Subject Re: Benifits by adding nodes to the cluster
Date Thu, 01 Nov 2012 08:34:07 GMT
I've not run it myself, but upgrading is part of the design. 

Cheers

-----------------
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com

On 1/11/2012, at 10:43 AM, Wei Zhu <wz1975@yahoo.com> wrote:

> I heard about virtual nodes. But it doesn't come out until 1.2. Is it easy to convert
the existing installation to use virtual nodes?
> 
> Thanks.
> -Wei 
> 
> From: aaron morton <aaron@thelastpickle.com>
> To: user@cassandra.apache.org 
> Sent: Wednesday, October 31, 2012 2:23 PM
> Subject: Re: Benifits by adding nodes to the cluster
> 
>> I have been told that it's much easier to scale the cluster by doubling the
>> number of nodes, since no token changed needed on the existing nodes.
> Yup.
> 
>> But if the number of nodes is substantial, it's not realistic to double it
>> every time.
> See the keynote from Jonathan Ellis or the talk on Virtual Nodes from Sam here 
> http://www.datastax.com/events/cassandrasummit2012/presentations
> 
> virtual nodes make this sort of thing faster and easier
> 
> 
>> How easy is to add let's say 3 additional nodes to the existing
>> 10 nodes?
> In that scenario would would need to move every node. 
> But if you have 10 nodes you probably don't want to scale up by 3, I would guess 5 or
10. Scaling is not something you want to do every day. 
> 
> How easy the process is depends on the level of automation in your environment. For example
Ops Centre can automate rebalancing nodes. 
> 
> Cheers
> 
> 
> -----------------
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
> 
> On 31/10/2012, at 7:14 AM, weiz <wz1975@yahoo.com> wrote:
> 
>> One follow up questions.
>> I have been told that it's much easier to scale the cluster by doubling the
>> number of nodes, since no token changed needed on the existing nodes.
>> But if the number of nodes is substantial, it's not realistic to double it
>> every time. How easy is to add let's say 3 additional nodes to the existing
>> 10 nodes? I understand the process of moving around data and delete unused
>> data. Just want to understand from the operational point of view, how
>> difficult is that? We are in the processing of evaluating the nosql
>> solution, one important consideration is the operation cost. Any real world
>> experience is very much appreciated.
>> 
>> Thanks.
>> -Wei 
>> 
>> 
>> 
>> --
>> View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Benifits-by-adding-nodes-to-the-cluster-tp7583437p7583466.html
>> Sent from the cassandra-user@incubator.apache.org mailing list archive at Nabble.com.
> 
> 
> 


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