Yes, but everything i want to know is, if my way to change the tunables is right or not? > Am 11.01.2017 um 13:11 schrieb Shinobu Kinjo <skinjo@xxxxxxxxxx>: > > Please refer to Jens's message. > > Regards, > >> On Wed, Jan 11, 2017 at 8:53 PM, Marcus Müller <mueller.marcus@xxxxxxxxx> wrote: >> Ok, thank you. I thought I have to set ceph to a tunables profile. If I’m right, then I just have to export the current crush map, edit it and import it again, like: >> >> ceph osd getcrushmap -o /tmp/crush >> crushtool -i /tmp/crush --set-choose-total-tries 100 -o /tmp/crush.new >> ceph osd setcrushmap -i /tmp/crush.new >> >> Is this right or not? >> >> I started this cluster with these 3 nodes and each 3 osds. They are vms. I knew that this cluster would expand very big, that’s the reason for my choice for ceph. Now I can’t add more HDDs to the vm hypervisor and I want to separate the nodes physically too. I bought a new node with these 4 drives and now another node with only 2 drives. As I hear now from several people this was not a good idea. For this reason, I bought now additional HDDs for the new node, so I have two with the same amount of HDDs and size. In the next 1-2 months I will get the third physical node and then everything should be fine. But at this time I have no other option. >> >> May it help to solve this problem by adding the 2 new HDDs to the new ceph node? >> >> >> >>> Am 11.01.2017 um 12:00 schrieb Brad Hubbard <bhubbard@xxxxxxxxxx>: >>> >>> Your current problem has nothing to do with clients and neither does >>> choose_total_tries. >>> >>> Try setting just this value to 100 and see if your situation improves. >>> >>> Ultimately you need to take a good look at your cluster configuration >>> and how your crush map is configured to deal with that configuration >>> but start with choose_total_tries as it has the highest probability of >>> helping your situation. Your clients should not be affected. >>> >>> Could you explain the reasoning behind having three hosts with one ods >>> each, one host with two osds and one with four? >>> >>> You likely need to tweak your crushmap to handle this configuration >>> better or, preferably, move to a more uniform configuration. >>> >>> >>>> On Wed, Jan 11, 2017 at 5:38 PM, Marcus Müller <mueller.marcus@xxxxxxxxx> wrote: >>>> I have to thank you all. You give free support and this already helps me. >>>> I’m not the one who knows ceph that good, but everyday it’s getting better >>>> and better ;-) >>>> >>>> According to the article Brad posted I have to change the ceph osd crush >>>> tunables. But there are two questions left as I already wrote: >>>> >>>> - According to >>>> http://docs.ceph.com/docs/master/rados/operations/crush-map/#tunables there >>>> are a few profiles. My needed profile would be BOBTAIL (CRUSH_TUNABLES2) >>>> wich would set choose_total_tries to 50. For the beginning better than 19. >>>> There I also see: "You can select a profile on a running cluster with the >>>> command: ceph osd crush tunables {PROFILE}“. My question on this is: Even if >>>> I run hammer, is it good and possible to set it to bobtail? >>>> >>>> - We can also read: >>>> WHICH CLIENT VERSIONS SUPPORT CRUSH_TUNABLES2 >>>> - v0.55 or later, including bobtail series (v0.56.x) >>>> - Linux kernel version v3.9 or later (for the file system and RBD kernel >>>> clients) >>>> >>>> And here my question is: If my clients use librados (version hammer), do I >>>> need to have this required kernel version on the clients or the ceph nodes? >>>> >>>> I don’t want to have troubles at the end with my clients. Can someone answer >>>> me this, before I change the settings? >>>> >>>> >>>> Am 11.01.2017 um 06:47 schrieb Shinobu Kinjo <skinjo@xxxxxxxxxx>: >>>> >>>> >>>> Yeah, Sam is correct. I've not looked at crushmap. But I should have >>>> noticed what troublesome is with looking at `ceph osd tree`. That's my >>>> bad, sorry for that. >>>> >>>> Again please refer to: >>>> >>>> http://www.anchor.com.au/blog/2013/02/pulling-apart-cephs-crush-algorithm/ >>>> >>>> Regards, >>>> >>>> >>>> On Wed, Jan 11, 2017 at 1:50 AM, Samuel Just <sjust@xxxxxxxxxx> wrote: >>>> >>>> Shinobu isn't correct, you have 9/9 osds up and running. up does not >>>> equal acting because crush is having trouble fulfilling the weights in >>>> your crushmap and the acting set is being padded out with an extra osd >>>> which happens to have the data to keep you up to the right number of >>>> replicas. Please refer back to Brad's post. >>>> -Sam >>>> >>>> On Mon, Jan 9, 2017 at 11:08 PM, Marcus Müller <mueller.marcus@xxxxxxxxx> >>>> wrote: >>>> >>>> Ok, i understand but how can I debug why they are not running as they >>>> should? For me I thought everything is fine because ceph -s said they are up >>>> and running. >>>> >>>> I would think of a problem with the crush map. >>>> >>>> Am 10.01.2017 um 08:06 schrieb Shinobu Kinjo <skinjo@xxxxxxxxxx>: >>>> >>>> e.g., >>>> OSD7 / 3 / 0 are in the same acting set. They should be up, if they >>>> are properly running. >>>> >>>> # 9.7 >>>> <snip> >>>> >>>> "up": [ >>>> 7, >>>> 3 >>>> ], >>>> "acting": [ >>>> 7, >>>> 3, >>>> 0 >>>> ], >>>> >>>> <snip> >>>> >>>> Here is an example: >>>> >>>> "up": [ >>>> 1, >>>> 0, >>>> 2 >>>> ], >>>> "acting": [ >>>> 1, >>>> 0, >>>> 2 >>>> ], >>>> >>>> Regards, >>>> >>>> >>>> On Tue, Jan 10, 2017 at 3:52 PM, Marcus Müller <mueller.marcus@xxxxxxxxx> >>>> wrote: >>>> >>>> >>>> That's not perfectly correct. >>>> >>>> OSD.0/1/2 seem to be down. >>>> >>>> >>>> >>>> Sorry but where do you see this? I think this indicates that they are up: >>>> osdmap e3114: 9 osds: 9 up, 9 in; 4 remapped pgs? >>>> >>>> >>>> Am 10.01.2017 um 07:50 schrieb Shinobu Kinjo <skinjo@xxxxxxxxxx>: >>>> >>>> On Tue, Jan 10, 2017 at 3:44 PM, Marcus Müller <mueller.marcus@xxxxxxxxx> >>>> wrote: >>>> >>>> All osds are currently up: >>>> >>>> health HEALTH_WARN >>>> 4 pgs stuck unclean >>>> recovery 4482/58798254 objects degraded (0.008%) >>>> recovery 420522/58798254 objects misplaced (0.715%) >>>> noscrub,nodeep-scrub flag(s) set >>>> monmap e9: 5 mons at >>>> {ceph1=192.168.10.3:6789/0,ceph2=192.168.10.4:6789/0,ceph3=192.168.10.5:6789/0,ceph4=192.168.60.6:6789/0,ceph5=192.168.60.11:6789/0} >>>> election epoch 478, quorum 0,1,2,3,4 >>>> ceph1,ceph2,ceph3,ceph4,ceph5 >>>> osdmap e3114: 9 osds: 9 up, 9 in; 4 remapped pgs >>>> flags noscrub,nodeep-scrub >>>> pgmap v9981077: 320 pgs, 3 pools, 4837 GB data, 19140 kobjects >>>> 15070 GB used, 40801 GB / 55872 GB avail >>>> 4482/58798254 objects degraded (0.008%) >>>> 420522/58798254 objects misplaced (0.715%) >>>> 316 active+clean >>>> 4 active+remapped >>>> client io 56601 B/s rd, 45619 B/s wr, 0 op/s >>>> >>>> This did not chance for two days or so. >>>> >>>> >>>> By the way, my ceph osd df now looks like this: >>>> >>>> ID WEIGHT REWEIGHT SIZE USE AVAIL %USE VAR >>>> 0 1.28899 1.00000 3724G 1699G 2024G 45.63 1.69 >>>> 1 1.57899 1.00000 3724G 1708G 2015G 45.87 1.70 >>>> 2 1.68900 1.00000 3724G 1695G 2028G 45.54 1.69 >>>> 3 6.78499 1.00000 7450G 1241G 6208G 16.67 0.62 >>>> 4 8.39999 1.00000 7450G 1228G 6221G 16.49 0.61 >>>> 5 9.51500 1.00000 7450G 1239G 6210G 16.64 0.62 >>>> 6 7.66499 1.00000 7450G 1265G 6184G 16.99 0.63 >>>> 7 9.75499 1.00000 7450G 2497G 4952G 33.52 1.24 >>>> 8 9.32999 1.00000 7450G 2495G 4954G 33.49 1.24 >>>> TOTAL 55872G 15071G 40801G 26.97 >>>> MIN/MAX VAR: 0.61/1.70 STDDEV: 13.16 >>>> >>>> As you can see, now osd2 also went down to 45% Use and „lost“ data. But I >>>> also think this is no problem and ceph just clears everything up after >>>> backfilling. >>>> >>>> >>>> Am 10.01.2017 um 07:29 schrieb Shinobu Kinjo <skinjo@xxxxxxxxxx>: >>>> >>>> Looking at ``ceph -s`` you originally provided, all OSDs are up. >>>> >>>> osdmap e3114: 9 osds: 9 up, 9 in; 4 remapped pgs >>>> >>>> >>>> But looking at ``pg query``, OSD.0 / 1 are not up. Are they something >>>> >>>> >>>> That's not perfectly correct. >>>> >>>> OSD.0/1/2 seem to be down. >>>> >>>> like related to ?: >>>> >>>> Ceph1, ceph2 and ceph3 are vms on one physical host >>>> >>>> >>>> Are those OSDs running on vm instances? >>>> >>>> # 9.7 >>>> <snip> >>>> >>>> "state": "active+remapped", >>>> "snap_trimq": "[]", >>>> "epoch": 3114, >>>> "up": [ >>>> 7, >>>> 3 >>>> ], >>>> "acting": [ >>>> 7, >>>> 3, >>>> 0 >>>> ], >>>> >>>> <snip> >>>> >>>> # 7.84 >>>> <snip> >>>> >>>> "state": "active+remapped", >>>> "snap_trimq": "[]", >>>> "epoch": 3114, >>>> "up": [ >>>> 4, >>>> 8 >>>> ], >>>> "acting": [ >>>> 4, >>>> 8, >>>> 1 >>>> ], >>>> >>>> <snip> >>>> >>>> # 8.1b >>>> <snip> >>>> >>>> "state": "active+remapped", >>>> "snap_trimq": "[]", >>>> "epoch": 3114, >>>> "up": [ >>>> 4, >>>> 7 >>>> ], >>>> "acting": [ >>>> 4, >>>> 7, >>>> 2 >>>> ], >>>> >>>> <snip> >>>> >>>> # 7.7a >>>> <snip> >>>> >>>> "state": "active+remapped", >>>> "snap_trimq": "[]", >>>> "epoch": 3114, >>>> "up": [ >>>> 7, >>>> 4 >>>> ], >>>> "acting": [ >>>> 7, >>>> 4, >>>> 2 >>>> ], >>>> >>>> <snip> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> ceph-users mailing list >>>> ceph-users@xxxxxxxxxxxxxx >>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>>> >>>> >>> >>> >>> >>> -- >>> Cheers, >>> Brad >> _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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