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From Jim Ancona <...@anconafamily.com>
Subject Re: vnodes ready for production ?
Date Wed, 19 Jun 2013 14:04:09 GMT
On Tue, Jun 18, 2013 at 4:04 AM, aaron morton <aaron@thelastpickle.com> wrote:
>> Even more if we could automate some up-scale thanks to AWS alarms, It
>> would be awesome.
>
> I saw a demo for Priam (https://github.com/Netflix/Priam) doing that at
> netflix in March, not sure if it's public yet.
>
>> Are the vnodes feature and the tokens =>vnodes transition safe enough to
>> go live with vnodes ?
>
> There have been some issues, search the user list for shuffle and as always
> test.
>
>> Any advice about vnodes ?
>
> They are in use out there. It's a sizable change so it would be good idea to
> build a test system for running shuffle and testing your application. There
> have been some issues with repair and range scans (including hadoop
> integration.)

Also, in his presentation at last week's Summit, Eric Evans suggested
not using shuffle. As an alternative he suggested removing and
replacing nodes one-by-one.

Jim

>
> Cheers
>
> -----------------
> Aaron Morton
> Freelance Cassandra Consultant
> New Zealand
>
> @aaronmorton
> http://www.thelastpickle.com
>
> On 18/06/2013, at 7:04 PM, Alain RODRIGUEZ <arodrime@gmail.com> wrote:
>
> Any insights on vnodes, one month after my original post ?
>
>
> 2013/5/16 Alain RODRIGUEZ <arodrime@gmail.com>
>>
>> Hi,
>>
>> Adding vnodes is a big improvement to Cassandra, specifically because we
>> have a fluctuating load on our Cassandra depending on the week, and it is
>> quite annoying to add some nodes for one week or two, move tokens and then
>> having to remove them and then move tokens again. Even more if we could
>> automate some up-scale thanks to AWS alarms, It would be awesome.
>>
>> We don't use vnodes yet because Opscenter did not support this feature and
>> because we need to have a reliable production. Now Opscenter handles vnodes.
>>
>> Are the vnodes feature and the tokens =>vnodes transition safe enough to
>> go live with vnodes ?
>>
>> What would be the transition process ?
>>
>> Does someone auto-scale his Cassandra cluster ?
>>
>> Any advice about vnodes ?
>
>
>

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