Hi Fabien,
we have also used it several times for 2 DC setups.
However, we always try to use as few chunks as possible, as it is very
inefficient when storing small files (min alloc size) and it can also
lead to quite some problems with backfill and recovery in large ceph
clusters.
Joachim
___________________________________
Clyso GmbH - Ceph Foundation Member
Am 24.03.23 um 13:00 schrieb Fabien Sirjean:
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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