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From Andrey Ilinykh <ailin...@gmail.com>
Subject Re: vnodes on aws
Date Fri, 06 Dec 2013 02:58:46 GMT
On Thu, Dec 5, 2013 at 3:31 PM, Jayadev Jayaraman <jdisalive@gmail.com>wrote:

> Availability zones are analogous to racks not data centres . EC2 regions
> are equivalent to data centres.
>
Yes, this is what I meant. I guess my question is - is possible to put row
in every rack using vnodes?

Thank you,
   Andrey



> On Dec 5, 2013 2:32 PM, "Andrey Ilinykh" <ailinykh@gmail.com> wrote:
>
>> Hello everybody!
>> We run cassandra 1.1 on ec2 instances. We use three availability zones,
>> the replication factor is 3 also. NetworkTopologyStrategy guarantees each
>> row is replicated in all availability zones. So, if we lost one zone quorum
>> operations still work. We think about to upgrade to 1.2. Virtual nodes are
>> the main reason. My understanding is - vnodes are distributed randomly, so
>> their is no way to put every row into all availability zones.  Am I right?
>> What would be the best way to deploy vnodes across several data centers
>> (availability zones)?
>>
>>
>> Thank you,
>>   Andrey
>>
>

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