Re: Mixed versions of cluster and clients

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> 15 сент. 2017 г., в 18:42, Sage Weil <sage@xxxxxxxxxxxx> написал(а):
> 
> On Fri, 15 Sep 2017, Mike A wrote:
>> Hello!
>> 
>> We have a ceph cluster based on Jewel release and one virtualization infrastructure that is using the cluster. Now we are going to add another ceph cluster but based on luminous with bluestore. 
>> The virtualization infrastructure must use these ceph clusters.  Do I need to update software version of client (librbd/librados) inside the virtualization infra? 
>> 
>> I think there are 3 different ways to add the new cluster:
>> 1. Update client side to the Luminous release and leave old cluster to the Jewel release
>> 2. Update old cluster and client to the Luminous release
>> 3. Leave old cluster and client to the Jewel release
>> 
>> Please suggest pros and cons.
> 
> You can use either jewel or luminous clients.  Just be aware that the 
> luminous cluster can't use luminous-only features until clients are 
> upgrade.  By default, new luminous clusters will set their "min compat 
> client" to jewel, so no special configuration is needed.
> 
> 3 is the smallest change and least risk, which is appealing. You'll want 
> to do 2 eventually, and 1 is a step along that path.
> 
> sage

Thank you for the detailed answer.

— 
Mike, runs!--
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