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From Andrey Ilinykh <ailin...@gmail.com>
Subject Re: Cass 1.2.11: Replacing a node procedure
Date Thu, 13 Feb 2014 22:43:41 GMT
decommission
http://www.datastax.com/docs/1.1/cluster_management#replacing-a-dead-node


On Thu, Feb 13, 2014 at 2:28 PM, Oleg Dulin <oleg.dulin@gmail.com> wrote:

> Here is what I am thinking.
>
> 1) Add the new node with token-1 of the old one and let it bootstrap.
> 2) Once it bootstrapped, remove the old node from the ring
>
> Now, it is #2 that I need clarification on.
>
> Do I use "decommission" or "remove" ? How long should I expect those
> processes to run ?
>
> Regards,
> Oleg
>
>
>
>
> On 2014-02-13 22:01:10 +0000, Oleg Dulin said:
>
>  Dear Distinguished Colleagues:
>>
>> I have a situation where in the production environment one of the
>> machines is overheating and needs to be serviced. Now, the landscape looks
>> like this:
>>
>> 4 machines in primary DC, 4 machiens in DR DC. Replication factor is 2.
>>
>> I also have a QA environment with 4 machines in a single DC, RF=2 as well.
>>
>> We need to work with the manufaturer to figure out what is wrong with the
>> machine. The proposed course of action is the following:
>>
>> 1) Take the faulty prod machine (lets call it X) out of production.
>> 2) Take a healthy QA machine (lets call it Y) out of QA
>> 3) Plug QA machine into the prod cluster and rebuild it.
>> 4) Plug prod machine into the QA cluster and leave it alone and let the
>> manufacturer service it to their liking until they say it is fixed, at
>> which point we will just leave it in QA.
>>
>> So basically we are talking about replacing a dead node.
>>
>> I found this: http://www.datastax.com/documentation/cassandra/1.2/
>> webhelp/index.html#cassandra/operations/ops_replace_node_t.html
>>
>> I am not using vnodes, just plain vanilla tokens and RandomPartitioner.
>> So that procedure doesn't apply. I need some help putting together a
>> step-by-step checklist what I would need to do.
>>
>
>
> --
> Regards,
> Oleg Dulin
> http://www.olegdulin.com
>
>
>

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