Hi Ceph users!
I've been proposed an interesting EC setup I hadn't thought about before.
Scenario is : we have two server rooms and want to store ~4PiB with the
ability to loose 1 server room without loss of data or RW availability.
For the context, performance is not needed (cold storage mostly, used as
a big filesystem).
The idea is to use EC 8+12 over 24 servers (12 on each server room), so
if we loose 1 room we still have half of the EC parts (10/20) and are
able to loose 2 more servers before reaching the point where we loose data.
I find this pretty elegant when working on a two-sites context, as
efficiency is 40% (better than 33% three times replication) and the
redundancy is good.
What do you think of this setup ? Did you ever used EC profiles with M > K ?
Thanks for sharing your thoughts!
Cheers,
Fabien
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