In case of any issue, it gets very difficult to debug when we have multiple
versions.

On Tue, 23 Jun 2020 at 22:23, Jürgen Albersdorfer <jalbersdor...@gmail.com>
wrote:

> Hi, I would say „It depends“ - as it always does. I have had a 21 Node
> Cluster running in Production in one DC with versions ranging from 3.11.1
> to 3.11.6 without having had any single issue for over a year. I just
> upgraded all nodes to 3.11.6 for the sake of consistency.
>
> Von meinem iPhone gesendet
>
> Am 24.06.2020 um 02:56 schrieb Surbhi Gupta <surbhi.gupt...@gmail.com>:
>
> 
>
> Hi ,
>
> We have recently upgraded from 3.11.0 to 3.11.5 . There is a sstable
> format change from 3.11.4 .
> We also had to expand the cluster and we also discussed about expansion
> first and than upgrade. But finally we upgraded and than expanded.
> As per our experience what I could tell you is, it is not advisable to add
> new nodes on higher version.
> There are many bugs which got fixed from 3.11.3 to 3.11.6.
>
> Thanks
> Surbhi
>
> On Tue, Jun 23, 2020 at 5:04 PM Jai Bheemsen Rao Dhanwada <
> jaibheem...@gmail.com> wrote:
>
>> Hello,
>>
>> I am trying to upgrade from 3.11.3 to 3.11.6.
>> Can I add new nodes with the 3.11.6  version to the cluster running with
>> 3.11.3?
>> Also, I see the SSTable format changed from mc-* to md-*, does this cause
>> any issues?
>>
>>

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