Also, what do you mean by "change journal side"? -Sam On Thu, Aug 20, 2015 at 4:15 PM, Samuel Just <sjust@xxxxxxxxxx> wrote: > Not sure what you mean by: > > but it's stop to work in same moment, when cache layer fulfilled with > data and evict/flush started... > -Sam > > On Thu, Aug 20, 2015 at 4:11 PM, Voloshanenko Igor > <igor.voloshanenko@xxxxxxxxx> wrote: >> 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 <sjust@xxxxxxxxxx>: >>> >>> 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.voloshanenko@xxxxxxxxx> wrote: >>> > Good joke ))))))))) >>> > >>> > 2015-08-21 2:06 GMT+03:00 Samuel Just <sjust@xxxxxxxxxx>: >>> >> >>> >> Certainly, don't reproduce this with a cluster you care about :). >>> >> -Sam >>> >> >>> >> On Thu, Aug 20, 2015 at 4:02 PM, Samuel Just <sjust@xxxxxxxxxx> 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.voloshanenko@xxxxxxxxx> 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.voloshanenko@xxxxxxxxx>: >>> >> >>> >>> >> >>> 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 <sjust@xxxxxxxxxx>: >>> >> >>>> >>> >> >>>> Also, can you include the kernel version? >>> >> >>>> -Sam >>> >> >>>> >>> >> >>>> On Thu, Aug 20, 2015 at 3:51 PM, Samuel Just <sjust@xxxxxxxxxx> >>> >> >>>> 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.panic@xxxxxxxxx> 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.voloshanenko@xxxxxxxxx> >>> >> >>>> >> 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@xxxxxxxxxxxxxx >>> >> >>>> >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> >> >>>> >>> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> >> >>> >> >>>> >> -- >>> >> >>>> >> >>> >> >>>> >> Andrija Panić >>> >> >>>> >> >>> >> >>>> >> _______________________________________________ >>> >> >>>> >> ceph-users mailing list >>> >> >>>> >> ceph-users@xxxxxxxxxxxxxx >>> >> >>>> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> >> >>>> >> >>> >> >>> >>> >> >>> >>> >> >> >>> > >>> > >> >> _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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