The placement groups are created, and the pool is completely functional for non-striper use. I can 'rados put' test objects in just fine to a pool created with any k value.
It's when the --striper option in 'rados put' is used to invoke the use of libradosstriper, it fails on pools where k is not a power of two. Example working and non-working profiles are as follows (I also tried w=16 for the 10+3). [root@ceph-dev-mon2 ~]# ceph osd erasure-code-profile get je-8-3-rfd-osd-echo-nodes crush-device-class=hdd crush-failure-domain=osd crush-root=echo-nodes jerasure-per-chunk-alignment=false k=8 m=3 plugin=jerasure technique=reed_sol_van w=8 [root@ceph-dev-mon2 ~]# ceph osd erasure-code-profile get je-10-3-rfd-osd-echo-nodes-2 crush-device-class=hdd crush-failure-domain=osd crush-root=echo-nodes jerasure-per-chunk-alignment=false k=10 m=3 plugin=jerasure technique=reed_sol_van w=8 -----Original Message----- From: Eugen Block <[email protected]> Sent: 05 September 2019 09:02 To: [email protected] Subject: [ceph-users] Re: rados + radosstriper puts fail with "large" input objects (mimic/nautilus, ec pool) 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 <[email protected]>: >> 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: [email protected] <[email protected]> > Sent: 04 September 2019 19:36 > To: [email protected] > Subject: [ceph-users] 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? > _______________________________________________ > ceph-users mailing list -- [email protected] To unsubscribe send an > email to [email protected] > _______________________________________________ > ceph-users mailing list -- [email protected] To unsubscribe send an > email to [email protected] _______________________________________________ ceph-users mailing list -- [email protected] To unsubscribe send an email to [email protected] _______________________________________________ ceph-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
