No, when we start draining cache - bad pgs was in place... We have big rebalance (disk by disk - to change journal side on both hot/cold layers).. All was Ok, but after 2 days - arrived scrub errors and 2 pgs inconsistent...
In writeback - yes, looks like snapshot works good. but it's stop to work in same moment, when cache layer fulfilled with data and evict/flush started... 2015-08-21 2:09 GMT+03:00 Samuel Just <sj...@redhat.com>: > So you started draining the cache pool before you saw either the > inconsistent pgs or the anomalous snap behavior? (That is, writeback > mode was working correctly?) > -Sam > > On Thu, Aug 20, 2015 at 4:07 PM, Voloshanenko Igor > <igor.voloshane...@gmail.com> wrote: > > Good joke ))))))))) > > > > 2015-08-21 2:06 GMT+03:00 Samuel Just <sj...@redhat.com>: > >> > >> Certainly, don't reproduce this with a cluster you care about :). > >> -Sam > >> > >> On Thu, Aug 20, 2015 at 4:02 PM, Samuel Just <sj...@redhat.com> wrote: > >> > What's supposed to happen is that the client transparently directs all > >> > requests to the cache pool rather than the cold pool when there is a > >> > cache pool. If the kernel is sending requests to the cold pool, > >> > that's probably where the bug is. Odd. It could also be a bug > >> > specific 'forward' mode either in the client or on the osd. Why did > >> > you have it in that mode? > >> > -Sam > >> > > >> > On Thu, Aug 20, 2015 at 3:58 PM, Voloshanenko Igor > >> > <igor.voloshane...@gmail.com> wrote: > >> >> We used 4.x branch, as we have "very good" Samsung 850 pro in > >> >> production, > >> >> and they don;t support ncq_trim... > >> >> > >> >> And 4,x first branch which include exceptions for this in libsata.c. > >> >> > >> >> sure we can backport this 1 line to 3.x branch, but we prefer no to > go > >> >> deeper if packege for new kernel exist. > >> >> > >> >> 2015-08-21 1:56 GMT+03:00 Voloshanenko Igor > >> >> <igor.voloshane...@gmail.com>: > >> >>> > >> >>> root@test:~# uname -a > >> >>> Linux ix-s5 4.0.4-040004-generic #201505171336 SMP Sun May 17 > 17:37:22 > >> >>> UTC > >> >>> 2015 x86_64 x86_64 x86_64 GNU/Linux > >> >>> > >> >>> 2015-08-21 1:54 GMT+03:00 Samuel Just <sj...@redhat.com>: > >> >>>> > >> >>>> Also, can you include the kernel version? > >> >>>> -Sam > >> >>>> > >> >>>> On Thu, Aug 20, 2015 at 3:51 PM, Samuel Just <sj...@redhat.com> > >> >>>> wrote: > >> >>>> > Snapshotting with cache/tiering *is* supposed to work. Can you > >> >>>> > open a > >> >>>> > bug? > >> >>>> > -Sam > >> >>>> > > >> >>>> > On Thu, Aug 20, 2015 at 3:36 PM, Andrija Panic > >> >>>> > <andrija.pa...@gmail.com> wrote: > >> >>>> >> This was related to the caching layer, which doesnt support > >> >>>> >> snapshooting per > >> >>>> >> docs...for sake of closing the thread. > >> >>>> >> > >> >>>> >> On 17 August 2015 at 21:15, Voloshanenko Igor > >> >>>> >> <igor.voloshane...@gmail.com> > >> >>>> >> wrote: > >> >>>> >>> > >> >>>> >>> Hi all, can you please help me with unexplained situation... > >> >>>> >>> > >> >>>> >>> All snapshot inside ceph broken... > >> >>>> >>> > >> >>>> >>> So, as example, we have VM template, as rbd inside ceph. > >> >>>> >>> We can map it and mount to check that all ok with it > >> >>>> >>> > >> >>>> >>> root@test:~# rbd map > >> >>>> >>> cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5 > >> >>>> >>> /dev/rbd0 > >> >>>> >>> root@test:~# parted /dev/rbd0 print > >> >>>> >>> Model: Unknown (unknown) > >> >>>> >>> Disk /dev/rbd0: 10.7GB > >> >>>> >>> Sector size (logical/physical): 512B/512B > >> >>>> >>> Partition Table: msdos > >> >>>> >>> > >> >>>> >>> Number Start End Size Type File system Flags > >> >>>> >>> 1 1049kB 525MB 524MB primary ext4 boot > >> >>>> >>> 2 525MB 10.7GB 10.2GB primary lvm > >> >>>> >>> > >> >>>> >>> Than i want to create snap, so i do: > >> >>>> >>> root@test:~# rbd snap create > >> >>>> >>> cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5@new_snap > >> >>>> >>> > >> >>>> >>> And now i want to map it: > >> >>>> >>> > >> >>>> >>> root@test:~# rbd map > >> >>>> >>> cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5@new_snap > >> >>>> >>> /dev/rbd1 > >> >>>> >>> root@test:~# parted /dev/rbd1 print > >> >>>> >>> Warning: Unable to open /dev/rbd1 read-write (Read-only file > >> >>>> >>> system). > >> >>>> >>> /dev/rbd1 has been opened read-only. > >> >>>> >>> Warning: Unable to open /dev/rbd1 read-write (Read-only file > >> >>>> >>> system). > >> >>>> >>> /dev/rbd1 has been opened read-only. > >> >>>> >>> Error: /dev/rbd1: unrecognised disk label > >> >>>> >>> > >> >>>> >>> Even md5 different... > >> >>>> >>> root@ix-s2:~# md5sum /dev/rbd0 > >> >>>> >>> 9a47797a07fee3a3d71316e22891d752 /dev/rbd0 > >> >>>> >>> root@ix-s2:~# md5sum /dev/rbd1 > >> >>>> >>> e450f50b9ffa0073fae940ee858a43ce /dev/rbd1 > >> >>>> >>> > >> >>>> >>> > >> >>>> >>> Ok, now i protect snap and create clone... but same thing... > >> >>>> >>> md5 for clone same as for snap,, > >> >>>> >>> > >> >>>> >>> root@test:~# rbd unmap /dev/rbd1 > >> >>>> >>> root@test:~# rbd snap protect > >> >>>> >>> cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5@new_snap > >> >>>> >>> root@test:~# rbd clone > >> >>>> >>> cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5@new_snap > >> >>>> >>> cold-storage/test-image > >> >>>> >>> root@test:~# rbd map cold-storage/test-image > >> >>>> >>> /dev/rbd1 > >> >>>> >>> root@test:~# md5sum /dev/rbd1 > >> >>>> >>> e450f50b9ffa0073fae940ee858a43ce /dev/rbd1 > >> >>>> >>> > >> >>>> >>> .... but it's broken... > >> >>>> >>> root@test:~# parted /dev/rbd1 print > >> >>>> >>> Error: /dev/rbd1: unrecognised disk label > >> >>>> >>> > >> >>>> >>> > >> >>>> >>> ========= > >> >>>> >>> > >> >>>> >>> tech details: > >> >>>> >>> > >> >>>> >>> root@test:~# ceph -v > >> >>>> >>> ceph version 0.94.2 (5fb85614ca8f354284c713a2f9c610860720bbf3) > >> >>>> >>> > >> >>>> >>> We have 2 inconstistent pgs, but all images not placed on this > >> >>>> >>> pgs... > >> >>>> >>> > >> >>>> >>> root@test:~# ceph health detail > >> >>>> >>> HEALTH_ERR 2 pgs inconsistent; 18 scrub errors > >> >>>> >>> pg 2.490 is active+clean+inconsistent, acting [56,15,29] > >> >>>> >>> pg 2.c4 is active+clean+inconsistent, acting [56,10,42] > >> >>>> >>> 18 scrub errors > >> >>>> >>> > >> >>>> >>> ============ > >> >>>> >>> > >> >>>> >>> root@test:~# ceph osd map cold-storage > >> >>>> >>> 0e23c701-401d-4465-b9b4-c02939d57bb5 > >> >>>> >>> osdmap e16770 pool 'cold-storage' (2) object > >> >>>> >>> '0e23c701-401d-4465-b9b4-c02939d57bb5' -> pg 2.74458f70 (2.770) > >> >>>> >>> -> up > >> >>>> >>> ([37,15,14], p37) acting ([37,15,14], p37) > >> >>>> >>> root@test:~# ceph osd map cold-storage > >> >>>> >>> 0e23c701-401d-4465-b9b4-c02939d57bb5@snap > >> >>>> >>> osdmap e16770 pool 'cold-storage' (2) object > >> >>>> >>> '0e23c701-401d-4465-b9b4-c02939d57bb5@snap' -> pg 2.793cd4a3 > >> >>>> >>> (2.4a3) > >> >>>> >>> -> up > >> >>>> >>> ([12,23,17], p12) acting ([12,23,17], p12) > >> >>>> >>> root@test:~# ceph osd map cold-storage > >> >>>> >>> 0e23c701-401d-4465-b9b4-c02939d57bb5@test-image > >> >>>> >>> osdmap e16770 pool 'cold-storage' (2) object > >> >>>> >>> '0e23c701-401d-4465-b9b4-c02939d57bb5@test-image' -> pg > >> >>>> >>> 2.9519c2a9 > >> >>>> >>> (2.2a9) > >> >>>> >>> -> up ([12,44,23], p12) acting ([12,44,23], p12) > >> >>>> >>> > >> >>>> >>> > >> >>>> >>> Also we use cache layer, which in current moment - in forward > >> >>>> >>> mode... > >> >>>> >>> > >> >>>> >>> Can you please help me with this.. As my brain stop to > understand > >> >>>> >>> what is > >> >>>> >>> going on... > >> >>>> >>> > >> >>>> >>> Thank in advance! > >> >>>> >>> > >> >>>> >>> > >> >>>> >>> > >> >>>> >>> > >> >>>> >>> > >> >>>> >>> _______________________________________________ > >> >>>> >>> ceph-users mailing list > >> >>>> >>> ceph-users@lists.ceph.com > >> >>>> >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> >>>> >>> > >> >>>> >> > >> >>>> >> > >> >>>> >> > >> >>>> >> -- > >> >>>> >> > >> >>>> >> Andrija Panić > >> >>>> >> > >> >>>> >> _______________________________________________ > >> >>>> >> ceph-users mailing list > >> >>>> >> ceph-users@lists.ceph.com > >> >>>> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> >>>> >> > >> >>> > >> >>> > >> >> > > > > >
_______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
