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From "techpyaasa ." <techpya...@gmail.com>
Subject Re: Can nodes in c* cluster run different versions ?
Date Wed, 16 Nov 2016 21:03:19 GMT
Thank you @Alain

On Wed, Nov 16, 2016 at 9:13 PM, Alain RODRIGUEZ <arodrime@gmail.com> wrote:

> Hey Techpyaasa,
>
> Are you aware of this documentation?
>
> https://docs.datastax.com/en/upgrade/doc/upgrade/cassandra/
> upgrdCassandraDetails.html
>
> Basically yes, you can have multiple versions, but you want to make this
> multi-version time it as short as possible.
>
> As it might take few days as it will have 'upgrade sstables' , so just
>> wanted to know would be there any possibility during this mismatch of c*
>> version among nodes in cluster during this upgrade process?
>
>
> To make the upgrade as short as possible I use to migrate the whole
> cluster and only after upgrade sstables. This minimises the time you're
> running multiple version.
>
> The only (soft) limitation, is that you shouldn't be streaming data around
> (do not bootstrap, repair or remove a node). It might work, that's why I
> say "soft limitation" but it might not work, there is no guarantee, it
> mainly depends on changes that were made between versions I believe.
>
> C*heers,
> -----------------------
> Alain Rodriguez - @arodream - alain@thelastpickle.com
> France
>
> The Last Pickle - Apache Cassandra Consulting
> http://www.thelastpickle.com
>
>
>
> 2016-11-16 11:12 GMT+01:00 techpyaasa . <techpyaasa@gmail.com>:
>
>> Hi all,
>>
>> We are currently running c*-2.0.17 with 2 datacenters each with 18 nodes.
>>
>> We like to upgrade to c*-2.1.16. Can we upgrade first all nodes(one by
>> one) in one dc and then go to next data center.
>>
>> As it might take few days as it will have 'upgrade sstables' , so just
>> wanted to know would be there any possibility during this mismatch of c*
>> version among nodes in cluster during this upgrade process?
>>
>> Thanks
>> Techpyaasa
>>
>
>

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