Hi,
I'm not sure if this could really be a bug. We have configured several
ec pools with different profiles, many of them with k not a power of
2, e.g. k3 m7, k7 m11 on Luminous, k5 m1 in a Nautilus test cluster, I
haven't had any issues regarding these profile yet.
Can you share the ruleset the pool is created with? Are all of the PGs
actually created? You can check with
ceph pg ls-by-pool <POOL> | tr -s ' ' | cut -d " " --fields=1,17
Regards,
Eugen
Zitat von Thomas Byrne - UKRI STFC <tom.byrne@xxxxxxxxxx>:
It seems likely that jerasure ec pools (at least) are not
compatible with libradosstriper if k is not a power of 2.
Yes, that seems like the summary of the issue as it stands, I'm
intrigued to know what libradosstriper is doing compared to librados
that makes it only work on specific layouts, as in my mind these two
layers were effectively separate, but there must be something going
on here that I'm not aware of.
This definitely seems like a bug, or at least incredibly confusing
undocumented behaviour.
Cheers,
Tom
-----Original Message-----
From: aoanla@xxxxxxxxx <aoanla@xxxxxxxxx>
Sent: 04 September 2019 19:36
To: ceph-users@xxxxxxx
Subject: Re: rados + radosstriper puts fail with
"large" input objects (mimic/nautilus, ec pool)
Hi Tom:
So, the failing ec code is also 10+2 here:
ceph osd erasure-code-profile set glasgow-ec \
k=10 \
m=2 \
crush-failure-domain=osd
Test EC codes which have succeeded, so far are:
k=4, m=2 failure-domain=osd
k=4, m=2 failure-domain=host
k=8, m=2 failure-domain=osd
EC codes which have failed
k=6, m=2 failure-domain=osd
k=10, m=2 failure-domain=osd
It seems likely that jerasure ec pools (at least) are not compatible
with libradosstriper if k is not a power of 2.
I suggest this be submitted as a bug?
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