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From Jacob Shadix <jacobsha...@gmail.com>
Subject Re: Multiple nodes decommission
Date Tue, 11 Apr 2017 17:37:40 GMT
Right! Another reason why I just stick with sequential decommissions. Maybe
someone here could shed some light on what happens under the covers if
parallel decommissions are kicked off.

-- Jacob Shadix

On Tue, Apr 11, 2017 at 12:55 PM, benjamin roth <brstgt@gmail.com> wrote:

> I did not test it but I'd bet that parallel decommision will lead to
> inconsistencies.
> Each decommission results in range movements and range reassignments which
> becomes effective after a successful decommission.
> If you start several decommissions at once, I guess the calculated
> reassignments are invalid for at least one node after the first node
> finished the decommission process.
>
> I hope someone will correct me if i am wrong.
>
> 2017-04-11 18:43 GMT+02:00 Jacob Shadix <jacobshadix@gmail.com>:
>
>> Are you using vnodes? I typically do one-by-one as the decommission will
>> create additional load/network activity streaming data to the other nodes
>> as the token ranges are reassigned.
>>
>> -- Jacob Shadix
>>
>> On Sat, Apr 8, 2017 at 10:55 AM, Vlad <qa23d-vvd@yahoo.com> wrote:
>>
>>> Hi,
>>>
>>> how multiple nodes should be decommissioned by "nodetool decommission"-
>>> one by one or in parallel ?
>>>
>>> Thanks.
>>>
>>
>>
>

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