On Fri, Dec 13, 2019 at 10:36 AM Dan van der Ster <dan(a)vanderster.com> wrote:
Hi all,
We have said in the past that an EC pool should have min_size=k+1, for
the same reasons that a replica 3 pool needs min_size=2.
And we've heard several stories about replica 3, min_size=1 leading to
incomplete PGs.
Taking a quick poll -- did anyone ever suffer an outage on a pool with
k=2, m=1, min_size=2?
I don't know about losses, but I'd expect this configuration to be
slightly less safe than replica 2 — you lose data after 2 related
disks crash, but you have 3 related disks that can fail instead of
only 2.
-Greg