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From Igor Leão <igor.l...@ubee.in>
Subject Re: Upgrading from Cassandra 3.9 to Cassandra 3.11
Date Fri, 04 Aug 2017 19:36:41 GMT
Hi Petrus,

Thanks!
I see it's considered a good practice to always have snapshots, but I
couldn't quite understand if it is possible to add new nodes running
Cassandra 3.11 into a Cassandra 3.9 cluster.
I tried doing so this morning, using
`-Dcassandra.force_3_0_protocol_version=true`,
and everything worked fine, but these new nodes were with 90%+ of cpu
usage, so I removed them. Do you have any idea why this happened? Should I
always upgrade every machine locally, keeping its data, instead of adding
new nodes with a newer version? Best,

2017-08-04 16:01 GMT-03:00 Petrus Gomes <petrusgf@gmail.com>:

> Hi Igor,
> Have a look into that document. ;-)
> https://github.com/apache/cassandra/blob/cassandra-3.11/NEWS.txt
> Thanks,
> Petrus Silva
>
> On Fri, Aug 4, 2017 at 10:15 AM, Igor Leão <igor.leao@ubee.in> wrote:
>
>> Hi there,
>>
>> Is it possible to add a Cassandra 3.11 node into a Cassandra 3.9 cluster?
>> I wish I could upgrade this cluster without uninstalling and installing
>> Cassandra on existing nodes, just by adding and removing nodes.
>>
>> Thanks in advance!
>>
>
>


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