Hi Dan,
Thanks for this info, will do this upgrades.
-----Original Message-----
Cc: ceph-users
Subject: Re: [ceph-users] bug of the year (with compressed omap and lz
1.7(?))
Hi Marc,
As far as I know, the osdmap corruption occurs with this osd config:
bluestore_compression_mode=aggressive
bluestore_compression_algorithm=lz4
(My understanding is that if you don't have the above settings, but use
pool-specific compression settings instead, then the osdmaps are not
compressed, so they would not be corruptable).
I prefer to stay on the safe side, though: since we know that lz4 <
1.8.2 can corrupt data if comes from fragmented memory, and we don't
know all of the cases where that might be the case, I suggest to use
another algorithm or turn off compression until you have upgraded to
v14.2.10 or newer.
And btw, there was another bug earlier in nautilus where those
pool-specific compression settings weren't applied correctly anyway, so
I'm not sure they even work yet in 14.2.9.
-- dan
On Sat, Sep 5, 2020 at 6:12 PM Marc Roos <M.Roos(a)f1-outsourcing.eu>
wrote:
I am still running 14.2.9 with lz4-1.7.5-3. Will I run into this bug
enabling compression on a pool with:
ceph osd pool set POOL_NAME compression_algorithm
COMPRESSION_ALGORITHM ceph osd pool set POOL_NAME compression_mode
COMPRESSION_MODE
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