[Gluster-users] Production cluster planning

Joe Julian joe at julianfamily.org
Thu Oct 27 14:02:07 UTC 2016

On 10/27/2016 12:06 AM, Gandalf Corvotempesta wrote:
> 2016-10-26 23:38 GMT+02:00 Joe Julian <joe at julianfamily.org>:
>> Just do the reliability calculations and engineer a storage system to meet
>> (exceed) your obligations within the available budget.
>> http://www.eventhelix.com/realtimemantra/faulthandling/system_reliability_availability.htm
> This is good to evaluate reliability with 3 nodes in parallel (like replica 3).
> With three nodes, with 2-nines each, I'll get 6-nines.
> But how can I calculate the number of nines for each single server?

To do that you need the MTBF and MTTR for that server. Most enterprise 
server manufacturers publish their MTBF numbers, averaging around 45000 
hours. MTTR depends on your implementation specific procedures as well 
as physical constraints.

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