On 10/27/2016 12:06 AM, Gandalf Corvotempesta wrote:
2016-10-26 23:38 GMT+02:00 Joe Julian <joe@xxxxxxxxxxxxxxxx>:
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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