Have you tried running iperf between the nodes? Capturing a pcap of the (failing) Ceph comms from both sides could help narrow it down. Is there any SDN layer involved that could add overhead/padding to the frames? What about some intermediate MTU like 8000 - does that work? Oh and if there's any bonding/trunking involved, beware that you need to set the same MTU and offloads on all interfaces on certains kernels - flags like MTU/offloads should propagate between the master/slave interfaces but in reality it's not the case and they get reset even if you unplug/replug the ethernet cable. Jan > On 09 Oct 2015, at 13:21, Max A. Krasilnikov <pseudo@xxxxxxxxxxxx> wrote: > > Hello! > > On Fri, Oct 09, 2015 at 11:05:59AM +0200, jan wrote: > >> Are there any errors on the NICs? (ethtool -s ethX) > > No errors. Neither on nodes, nor on switches. > >> Also take a look at the switch and look for flow control statistics - do you have flow control enabled or disabled? > > flow control disabled everywhere. > >> We had to disable flow control as it would pause all IO on the port whenever any path got congested which you don't want to happen with a cluster like Ceph. It's better to let the frame drop/retransmit in this case (and you should size it so it doesn't happen in any case). >> And how about NIC offloads? Do they play nice with jumbo frames? I wouldn't put my money on that... > > I tried to completely disable all offloads and setting mtu back to 9000 after. > No luck. > I am speaking with my NOC about MTU in 10G network. If I have update, I will > write here. I can hardly beleave that it is ceph side, but nothing is > impossible. > >> Jan > > >>> On 09 Oct 2015, at 10:48, Max A. Krasilnikov <pseudo@xxxxxxxxxxxx> wrote: >>> >>> Hello! >>> >>> On Thu, Oct 08, 2015 at 11:44:09PM -0600, robert wrote: >>> >>>> -----BEGIN PGP SIGNED MESSAGE----- >>>> Hash: SHA256 >>> >>>> Sage, >>> >>>> After trying to bisect this issue (all test moved the bisect towards >>>> Infernalis) and eventually testing the Infernalis branch again, it >>>> looks like the problem still exists although it is handled a tad >>>> better in Infernalis. I'm going to test against Firefly/Giant next >>>> week and then try and dive into the code to see if I can expose any >>>> thing. >>> >>>> If I can do anything to provide you with information, please let me know. >>> >>> I have fixed my troubles by setting MTU back to 1500 from 9000 in 2x10G network >>> between nodes (2x Cisco Nexus 5020, one link per switch, LACP, linux bounding >>> driver: bonding mode=4 lacp_rate=1 xmit_hash_policy=1 miimon=100, Intel 82599ES >>> Adapter, non-intel sfp+). When setting it to 9000 on nodes and 9216 on Nexus 5020 >>> switch with Jumbo frames enabled i have performance drop and slow requests. When >>> setting 1500 on nodes and not touching Nexus all problems are fixed. >>> >>> I have rebooted all my ceph services when changing MTU and changing things to >>> 9000 and 1500 several times in order to be sure. It is reproducable in my >>> environment. >>> >>>> Thanks, >>>> -----BEGIN PGP SIGNATURE----- >>>> Version: Mailvelope v1.2.0 >>>> Comment: https://www.mailvelope.com >>> >>>> wsFcBAEBCAAQBQJWF1QlCRDmVDuy+mK58QAAWLgP/2l+TkcpeKihDxF8h/kw >>>> YFffNWODNfOMq8FVDQkQceo2mFCFc29JnBYiAeqW+XPelwuU5S86LG998aUB >>>> BvIU4EHaJNJ31X1NCIA7nwi8rXlFYfSG2qQn58+IzqZoWCQM5vD/THISV1rP >>>> qQKtoOAEuRxz+vOAJGI1A1xJSOiFwTRjs4LjE1zYjSP26LdEF61D/lb+AVzV >>>> ufxi/ci6mAla/4VTAH4VqEviDgC8AbAZnWFGfUPcTUxJQS99kFrfjJnWvgyF >>>> V9EmWtQCvhRO74hQLBqspOwdAxEJesPfGcJT1LjR0eEAMWvbGPtaqbSFAEWa >>>> jjyy5wP9+4NnGLdhba6UBtLphjqTcl0e2vVwRj0zLhI14moAOlbhIKmZ1Dt+ >>>> 1P6vfgOUGvO76xgDMwrVKRoQgWJO/0Tup9+oqInnNYgf4W+ZWsLgLgo7ETAF >>>> VcI7LP1wkwAI3lz5YphY/TnKNGs6i+wVjKBamOt3R1yz9WeylaG0T6xgGHrs >>>> VugrRSUuO+ND9+mE5EsUgITCZoaavXJESJMb30XkK6hYGB+T/q+hBafc6Wle >>>> Jgs+aT2m1erdSyZn0ZC9a6CjWmwJXY6FCSGhE53BbefBxmCFxn+8tVav+Q8W >>>> 7s14TntP6ex4ca7eTwGuSXC9FU5fAVa+3+3aXDAC1QPAkeVkXyB716W1XG6b >>>> BCFo >>>> =GJL4 >>>> -----END PGP SIGNATURE----- >>>> ---------------- >>>> Robert LeBlanc >>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>> >>> >>>> On Wed, Oct 7, 2015 at 1:25 PM, Robert LeBlanc <robert@xxxxxxxxxxxxx> wrote: >>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>> Hash: SHA256 >>>>> >>>>> We forgot to upload the ceph.log yesterday. It is there now. >>>>> - ---------------- >>>>> Robert LeBlanc >>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>> >>>>> >>>>> On Tue, Oct 6, 2015 at 5:40 PM, Robert LeBlanc wrote: >>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>> Hash: SHA256 >>>>>> >>>>>> I upped the debug on about everything and ran the test for about 40 >>>>>> minutes. I took OSD.19 on ceph1 doen and then brought it back in. >>>>>> There was at least one op on osd.19 that was blocked for over 1,000 >>>>>> seconds. Hopefully this will have something that will cast a light on >>>>>> what is going on. >>>>>> >>>>>> We are going to upgrade this cluster to Infernalis tomorrow and rerun >>>>>> the test to verify the results from the dev cluster. This cluster >>>>>> matches the hardware of our production cluster but is not yet in >>>>>> production so we can safely wipe it to downgrade back to Hammer. >>>>>> >>>>>> Logs are located at http://dev.v3trae.net/~jlavoy/ceph/logs/ >>>>>> >>>>>> Let me know what else we can do to help. >>>>>> >>>>>> Thanks, >>>>>> -----BEGIN PGP SIGNATURE----- >>>>>> Version: Mailvelope v1.2.0 >>>>>> Comment: https://www.mailvelope.com >>>>>> >>>>>> wsFcBAEBCAAQBQJWFFwACRDmVDuy+mK58QAAs/UP/1L+y7DEfHqD/5OpkiNQ >>>>>> xuEEDm7fNJK58tLRmKsCrDrsFUvWCjiqUwboPg/E40e2GN7Lt+VkhMUEUWoo >>>>>> e3L20ig04c8Zu6fE/SXX3lnvayxsWTPcMnYI+HsmIV9E/efDLVLEf6T4fvXg >>>>>> 5dKLiqQ8Apu+UMVfd1+aKKDdLdnYlgBCZcIV9AQe1GB8X2VJJhmNWh6TQ3Xr >>>>>> gNXDexBdYjFBLu84FXOITd3ZtyUkgx/exCUMmwsJSc90jduzipS5hArvf7LN >>>>>> HD6m1gBkZNbfWfc/4nzqOQnKdY1pd9jyoiQM70jn0R5b2BlZT0wLjiAJm+07 >>>>>> eCCQ99TZHFyeu1LyovakrYncXcnPtP5TfBFZW952FWQugupvxPCcaduz+GJV >>>>>> OhPAJ9dv90qbbGCO+8kpTMAD1aHgt/7+0/hKZTg8WMHhua68SFCXmdGAmqje >>>>>> IkIKswIAX4/uIoo5mK4TYB5HdEMJf9DzBFd+1RzzfRrrRalVkBfsu5ChFTx3 >>>>>> mu5LAMwKTslvILMxAct0JwnwkOX5Gd+OFvmBRdm16UpDaDTQT2DfykylcmJd >>>>>> Cf9rPZxUv0ZHtZyTTyP2e6vgrc7UM/Ie5KonABxQ11mGtT8ysra3c9kMhYpw >>>>>> D6hcAZGtdvpiBRXBC5gORfiFWFxwu5kQ+daUhgUIe/O/EWyeD0rirZoqlLnZ >>>>>> EDrG >>>>>> =BZVw >>>>>> -----END PGP SIGNATURE----- >>>>>> ---------------- >>>>>> Robert LeBlanc >>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>> >>>>>> >>>>>> On Tue, Oct 6, 2015 at 2:36 PM, Robert LeBlanc wrote: >>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>> Hash: SHA256 >>>>>>> >>>>>>> On my second test (a much longer one), it took nearly an hour, but a >>>>>>> few messages have popped up over a 20 window. Still far less than I >>>>>>> have been seeing. >>>>>>> - ---------------- >>>>>>> Robert LeBlanc >>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>> >>>>>>> >>>>>>> On Tue, Oct 6, 2015 at 2:00 PM, Robert LeBlanc wrote: >>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>> Hash: SHA256 >>>>>>>> >>>>>>>> I'll capture another set of logs. Is there any other debugging you >>>>>>>> want turned up? I've seen the same thing where I see the message >>>>>>>> dispatched to the secondary OSD, but the message just doesn't show up >>>>>>>> for 30+ seconds in the secondary OSD logs. >>>>>>>> - ---------------- >>>>>>>> Robert LeBlanc >>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>> >>>>>>>> >>>>>>>> On Tue, Oct 6, 2015 at 1:34 PM, Sage Weil wrote: >>>>>>>>> On Tue, 6 Oct 2015, Robert LeBlanc wrote: >>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>> Hash: SHA256 >>>>>>>>>> >>>>>>>>>> I can't think of anything. In my dev cluster the only thing that has >>>>>>>>>> changed is the Ceph versions (no reboot). What I like is even though >>>>>>>>>> the disks are 100% utilized, it is preforming as I expect now. Client >>>>>>>>>> I/O is slightly degraded during the recovery, but no blocked I/O when >>>>>>>>>> the OSD boots or during the recovery period. This is with >>>>>>>>>> max_backfills set to 20, one backfill max in our production cluster is >>>>>>>>>> painful on OSD boot/recovery. I was able to reproduce this issue on >>>>>>>>>> our dev cluster very easily and very quickly with these settings. So >>>>>>>>>> far two tests and an hour later, only the blocked I/O when the OSD is >>>>>>>>>> marked out. We would love to see that go away too, but this is far >>>>>>>>> (me too!) >>>>>>>>>> better than what we have now. This dev cluster also has >>>>>>>>>> osd_client_message_cap set to default (100). >>>>>>>>>> >>>>>>>>>> We need to stay on the Hammer version of Ceph and I'm willing to take >>>>>>>>>> the time to bisect this. If this is not a problem in Firefly/Giant, >>>>>>>>>> you you prefer a bisect to find the introduction of the problem >>>>>>>>>> (Firefly/Giant -> Hammer) or the introduction of the resolution >>>>>>>>>> (Hammer -> Infernalis)? Do you have some hints to reduce hitting a >>>>>>>>>> commit that prevents a clean build as that is my most limiting factor? >>>>>>>>> >>>>>>>>> Nothing comes to mind. I think the best way to find this is still to see >>>>>>>>> it happen in the logs with hammer. The frustrating thing with that log >>>>>>>>> dump you sent is that although I see plenty of slow request warnings in >>>>>>>>> the osd logs, I don't see the requests arriving. Maybe the logs weren't >>>>>>>>> turned up for long enough? >>>>>>>>> >>>>>>>>> sage >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>>> Thanks, >>>>>>>>>> - ---------------- >>>>>>>>>> Robert LeBlanc >>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> On Tue, Oct 6, 2015 at 12:32 PM, Sage Weil wrote: >>>>>>>>>>> On Tue, 6 Oct 2015, Robert LeBlanc wrote: >>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>>>> Hash: SHA256 >>>>>>>>>>>> >>>>>>>>>>>> OK, an interesting point. Running ceph version 9.0.3-2036-g4f54a0d >>>>>>>>>>>> (4f54a0dd7c4a5c8bdc788c8b7f58048b2a28b9be) looks a lot better. I got >>>>>>>>>>>> messages when the OSD was marked out: >>>>>>>>>>>> >>>>>>>>>>>> 2015-10-06 11:52:46.961040 osd.13 192.168.55.12:6800/20870 81 : >>>>>>>>>>>> cluster [WRN] 17 slow requests, 3 included below; oldest blocked for > >>>>>>>>>>>> 34.476006 secs >>>>>>>>>>>> 2015-10-06 11:52:46.961056 osd.13 192.168.55.12:6800/20870 82 : >>>>>>>>>>>> cluster [WRN] slow request 32.913474 seconds old, received at >>>>>>>>>>>> 2015-10-06 11:52:14.047475: osd_op(client.600962.0:474 >>>>>>>>>>>> rbd_data.338102ae8944a.0000000000005270 [read 3302912~4096] 8.c74a4538 >>>>>>>>>>>> ack+read+known_if_redirected e58744) currently waiting for peered >>>>>>>>>>>> 2015-10-06 11:52:46.961066 osd.13 192.168.55.12:6800/20870 83 : >>>>>>>>>>>> cluster [WRN] slow request 32.697545 seconds old, received at >>>>>>>>>>>> 2015-10-06 11:52:14.263403: osd_op(client.600960.0:583 >>>>>>>>>>>> rbd_data.3380f74b0dc51.000000000001ee75 [read 1016832~4096] 8.778d1be3 >>>>>>>>>>>> ack+read+known_if_redirected e58744) currently waiting for peered >>>>>>>>>>>> 2015-10-06 11:52:46.961074 osd.13 192.168.55.12:6800/20870 84 : >>>>>>>>>>>> cluster [WRN] slow request 32.668006 seconds old, received at >>>>>>>>>>>> 2015-10-06 11:52:14.292942: osd_op(client.600955.0:571 >>>>>>>>>>>> rbd_data.3380f74b0dc51.0000000000019b09 [read 1034240~4096] 8.e87a6f58 >>>>>>>>>>>> ack+read+known_if_redirected e58744) currently waiting for peered >>>>>>>>>>>> >>>>>>>>>>>> But I'm not seeing the blocked messages when the OSD came back in. The >>>>>>>>>>>> OSD spindles have been running at 100% during this test. I have seen >>>>>>>>>>>> slowed I/O from the clients as expected from the extra load, but so >>>>>>>>>>>> far no blocked messages. I'm going to run some more tests. >>>>>>>>>>> >>>>>>>>>>> Good to hear. >>>>>>>>>>> >>>>>>>>>>> FWIW I looked through the logs and all of the slow request no flag point >>>>>>>>>>> messages came from osd.163... and the logs don't show when they arrived. >>>>>>>>>>> My guess is this OSD has a slower disk than the others, or something else >>>>>>>>>>> funny is going on? >>>>>>>>>>> >>>>>>>>>>> I spot checked another OSD at random (60) where I saw a slow request. It >>>>>>>>>>> was stuck peering for 10s of seconds... waiting on a pg log message from >>>>>>>>>>> osd.163. >>>>>>>>>>> >>>>>>>>>>> sage >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> -----BEGIN PGP SIGNATURE----- >>>>>>>>>>>> Version: Mailvelope v1.2.0 >>>>>>>>>>>> Comment: https://www.mailvelope.com >>>>>>>>>>>> >>>>>>>>>>>> wsFcBAEBCAAQBQJWFAzRCRDmVDuy+mK58QAASRYP/jrbKy5mptq/cSqJvB47 >>>>>>>>>>>> F/gEatsqU4/TwyIJg137DQTkONbHKnLgCZqsJLnCZRH8fFqtvY6g/Q/AA7Ks >>>>>>>>>>>> ouo5gvbjKM7pOm/uUn8kU44Xe15f/bkVHvWBECZzg8YJwinPAisp5R0m1HBC >>>>>>>>>>>> HLvsbeqV00m72TyfsZX4aj7lHdyvcdcIH2EVgX/db092VVXczK4q2gRoNr0Y >>>>>>>>>>>> 77BEr2Y/gPj5LM4b/aDG5AWY8dJZRlNz+B1CyLS+kIDXSaAbzul2UbAG6jNE >>>>>>>>>>>> KJEVxndMPfHLIdwg55+q8VTMIjqXcCM47cQhWFrKChgVD8byJxpc6E0TqOxs >>>>>>>>>>>> 1gtNE8AILoCSYKnwQZan+TBDGxki7rQxzMdNI+NLfhy1Mwd3lSCPsDtD7W/i >>>>>>>>>>>> tzNTr6aGz+wr+OPDQV5zrzLaPZYF3FLWN4n6RYNfnDramYzD76v+7kjdW4dE >>>>>>>>>>>> 5UVCtE7KGLCZ21fu6sln1b9q6lYXNtohAmAunIdqpo3FmHusRySyZzYKu1+9 >>>>>>>>>>>> zg/LHiArD/ddjkPxVWCTFBS17g/bESRcv2MsA30GS8J6k1zlQaLX5KeGg6Ql >>>>>>>>>>>> WJSmW8gFfEbXj/7JTrVtQWTdgjsegaySFnDisTWUR/hEM/NuKii4xfjI32M/ >>>>>>>>>>>> luUMXHZ8lTHk9C8MfZcpyPGvwp2FliD9LqaWOVPWtWZJcerEWcZVlEApg4qb >>>>>>>>>>>> fo5a >>>>>>>>>>>> =ahEi >>>>>>>>>>>> -----END PGP SIGNATURE----- >>>>>>>>>>>> ---------------- >>>>>>>>>>>> Robert LeBlanc >>>>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> On Tue, Oct 6, 2015 at 6:37 AM, Sage Weil wrote: >>>>>>>>>>>>> On Mon, 5 Oct 2015, Robert LeBlanc wrote: >>>>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>>>>>> Hash: SHA256 >>>>>>>>>>>>>> >>>>>>>>>>>>>> With some off-list help, we have adjusted >>>>>>>>>>>>>> osd_client_message_cap=10000. This seems to have helped a bit and we >>>>>>>>>>>>>> have seen some OSDs have a value up to 4,000 for client messages. But >>>>>>>>>>>>>> it does not solve the problem with the blocked I/O. >>>>>>>>>>>>>> >>>>>>>>>>>>>> One thing that I have noticed is that almost exactly 30 seconds elapse >>>>>>>>>>>>>> between an OSD boots and the first blocked I/O message. I don't know >>>>>>>>>>>>>> if the OSD doesn't have time to get it's brain right about a PG before >>>>>>>>>>>>>> it starts servicing it or what exactly. >>>>>>>>>>>>> >>>>>>>>>>>>> I'm downloading the logs from yesterday now; sorry it's taking so long. >>>>>>>>>>>>> >>>>>>>>>>>>>> On another note, I tried upgrading our CentOS dev cluster from Hammer >>>>>>>>>>>>>> to master and things didn't go so well. The OSDs would not start >>>>>>>>>>>>>> because /var/lib/ceph was not owned by ceph. I chowned the directory >>>>>>>>>>>>>> and all OSDs and the OSD then started, but never became active in the >>>>>>>>>>>>>> cluster. It just sat there after reading all the PGs. There were >>>>>>>>>>>>>> sockets open to the monitor, but no OSD to OSD sockets. I tried >>>>>>>>>>>>>> downgrading to the Infernalis branch and still no luck getting the >>>>>>>>>>>>>> OSDs to come up. The OSD processes were idle after the initial boot. >>>>>>>>>>>>>> All packages were installed from gitbuilder. >>>>>>>>>>>>> >>>>>>>>>>>>> Did you chown -R ? >>>>>>>>>>>>> >>>>>>>>>>>>> https://github.com/ceph/ceph/blob/infernalis/doc/release-notes.rst#upgrading-from-hammer >>>>>>>>>>>>> >>>>>>>>>>>>> My guess is you only chowned the root dir, and the OSD didn't throw >>>>>>>>>>>>> an error when it encountered the other files? If you can generate a debug >>>>>>>>>>>>> osd = 20 log, that would be helpful.. thanks! >>>>>>>>>>>>> >>>>>>>>>>>>> sage >>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> Thanks, >>>>>>>>>>>>>> -----BEGIN PGP SIGNATURE----- >>>>>>>>>>>>>> Version: Mailvelope v1.2.0 >>>>>>>>>>>>>> Comment: https://www.mailvelope.com >>>>>>>>>>>>>> >>>>>>>>>>>>>> wsFcBAEBCAAQBQJWE0F5CRDmVDuy+mK58QAAaCYQAJuFcCvRUJ46k0rYrMcc >>>>>>>>>>>>>> YlrSrGwS57GJS/JjaFHsvBV7KTobEMNeMkSv4PTGpwylNV9Dx4Ad74DDqX4g >>>>>>>>>>>>>> 6hZDe0rE+uEI7tW9Lqp+MN7eaU2lDuwLt/pOzZI14jTskUYTlNi3HjlN67mQ >>>>>>>>>>>>>> aiX1rbrJL6FFkuMOn/YqHpMbxI5ZOUZc1s7RDhASOPIs4z/CxpDfluW6fZA/ >>>>>>>>>>>>>> y8C+pW6zzS9U/6jZwtGhBq4dvDBO41Lxb9WOehD8Aa/Qt6XNDzGw2KEkEkw7 >>>>>>>>>>>>>> 8dBc7UFa2Wx3Tnzy238a/nKhtz6O6OrHsroA+HGWwCoxPWjOsz/xOoOmfwp+ >>>>>>>>>>>>>> ALkY3id+t2uJEqzbL8/MgJ2RV1A+AZ7W1VWIJUOkDz0wR+KxQsxduHoD6rQy >>>>>>>>>>>>>> zg0fj2KSAlmVusYOPM1s1+jBsqNF3wcNxpbRoVuFqk0xMgGPrIdUNdZHg6bs >>>>>>>>>>>>>> D5sfkjNKexFe0ifFJ0cfv6UaGIKv4dK2eq3jUKgXHfh/qZmJbEB+zHaqJNyg >>>>>>>>>>>>>> CN6w6xu1FHLeVobKAWe5ZzKY5lxw6b8YG+ce/E2dvW73gSASPTvtv68gaT04 >>>>>>>>>>>>>> 2SPF9Ql0fERL5EDY9Pc4MHpQVcS0XxxJA69CgnWgaG6fzq2eY7fALeMBVWlB >>>>>>>>>>>>>> fRj3zQwqJls/X8JZ3c4P4G0R6DP9bmMwGr++oYc3gWGrvgzxw3N7+ornd0jd >>>>>>>>>>>>>> GdXC >>>>>>>>>>>>>> =Aigq >>>>>>>>>>>>>> -----END PGP SIGNATURE----- >>>>>>>>>>>>>> ---------------- >>>>>>>>>>>>>> Robert LeBlanc >>>>>>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> On Sun, Oct 4, 2015 at 3:04 PM, Robert LeBlanc wrote: >>>>>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>>>>>>> Hash: SHA256 >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> I have eight nodes running the fio job rbd_test_real to different RBD >>>>>>>>>>>>>>> volumes. I've included the CRUSH map in the tarball. >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> I stopped one OSD process and marked it out. I let it recover for a >>>>>>>>>>>>>>> few minutes and then I started the process again and marked it in. I >>>>>>>>>>>>>>> started getting block I/O messages during the recovery. >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> The logs are located at http://162.144.87.113/files/ushou1.tar.xz >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> Thanks, >>>>>>>>>>>>>>> -----BEGIN PGP SIGNATURE----- >>>>>>>>>>>>>>> Version: Mailvelope v1.2.0 >>>>>>>>>>>>>>> Comment: https://www.mailvelope.com >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> wsFcBAEBCAAQBQJWEZRcCRDmVDuy+mK58QAALbEQAK5pFiixJarUdLm50zp/ >>>>>>>>>>>>>>> 3AGgGBPrieExKmoZZLCoMGfOLfxZDbN2ybtopKDQDfrTqndE/6Xi9UXqTOdW >>>>>>>>>>>>>>> jDc9U1wusgG0CKPsY1SMYnB9akvaDwtdh5q5k4VpN2zsG9R6lRojHeNQR3Nf >>>>>>>>>>>>>>> 56QevJL4/e5lC3sLhVnxXXi2XKnHCVOHT+PYgNour2ZWt6OTLoFFxuSU3zLN >>>>>>>>>>>>>>> OtfXgrFiiNF0mrDpm0gg2l8a8N5SwP9mM233S2U/JiGAqsqoqkfd0okjDenC >>>>>>>>>>>>>>> ksesU/n7zordFpfLN3yjL6+X9pQ4YA6otZrq4wWtjWKO/H0b+6iIsf/AE131 >>>>>>>>>>>>>>> R6a4Vufndpd3Ce+FNfM+iu3FmKk0KVfDAaF/tIP6S6XUzGVMAbpvpmqNL17o >>>>>>>>>>>>>>> boh3wPZEyK+7KiF4Qlt2KoI/FV24Yj8XiyMnKin3MbMYbammb4ER977VH7iI >>>>>>>>>>>>>>> sZyelNPSsYmmw/MF+AkA5KVgzQ4DAPflaejIgC5uw3dYKrn2AQE5CE9nN8Gz >>>>>>>>>>>>>>> GVVaGItu1Bvrz21QoT9o5v0dZ85zttFvtrKIYgSi4mdpC6XkzUbg9s9EB1/T >>>>>>>>>>>>>>> SEY+fau7W7TtiLpzCAIQ3zDvgsvkx2P6tKg5U8e93LVv9B+YI8i8mUxxv1j5 >>>>>>>>>>>>>>> PHFi7KTgRUPm1FPMJDSyzvOgqyMj9AzaESl1Na6k529ILFIcyfko0niTT1oZ >>>>>>>>>>>>>>> 3EPx >>>>>>>>>>>>>>> =UDIV >>>>>>>>>>>>>>> -----END PGP SIGNATURE----- >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> ---------------- >>>>>>>>>>>>>>> Robert LeBlanc >>>>>>>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> On Sun, Oct 4, 2015 at 7:48 AM, Sage Weil wrote: >>>>>>>>>>>>>>>> On Sat, 3 Oct 2015, Robert LeBlanc wrote: >>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>>>>>>>>> Hash: SHA256 >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> We are still struggling with this and have tried a lot of different >>>>>>>>>>>>>>>>> things. Unfortunately, Inktank (now Red Hat) no longer provides >>>>>>>>>>>>>>>>> consulting services for non-Red Hat systems. If there are some >>>>>>>>>>>>>>>>> certified Ceph consultants in the US that we can do both remote and >>>>>>>>>>>>>>>>> on-site engagements, please let us know. >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> This certainly seems to be network related, but somewhere in the >>>>>>>>>>>>>>>>> kernel. We have tried increasing the network and TCP buffers, number >>>>>>>>>>>>>>>>> of TCP sockets, reduced the FIN_WAIT2 state. There is about 25% idle >>>>>>>>>>>>>>>>> on the boxes, the disks are busy, but not constantly at 100% (they >>>>>>>>>>>>>>>>> cycle from <10% up to 100%, but not 100% for more than a few seconds >>>>>>>>>>>>>>>>> at a time). There seems to be no reasonable explanation why I/O is >>>>>>>>>>>>>>>>> blocked pretty frequently longer than 30 seconds. We have verified >>>>>>>>>>>>>>>>> Jumbo frames by pinging from/to each node with 9000 byte packets. The >>>>>>>>>>>>>>>>> network admins have verified that packets are not being dropped in the >>>>>>>>>>>>>>>>> switches for these nodes. We have tried different kernels including >>>>>>>>>>>>>>>>> the recent Google patch to cubic. This is showing up on three cluster >>>>>>>>>>>>>>>>> (two Ethernet and one IPoIB). I booted one cluster into Debian Jessie >>>>>>>>>>>>>>>>> (from CentOS 7.1) with similar results. >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> The messages seem slightly different: >>>>>>>>>>>>>>>>> 2015-10-03 14:38:23.193082 osd.134 10.208.16.25:6800/1425 439 : >>>>>>>>>>>>>>>>> cluster [WRN] 14 slow requests, 1 included below; oldest blocked for > >>>>>>>>>>>>>>>>> 100.087155 secs >>>>>>>>>>>>>>>>> 2015-10-03 14:38:23.193090 osd.134 10.208.16.25:6800/1425 440 : >>>>>>>>>>>>>>>>> cluster [WRN] slow request 30.041999 seconds old, received at >>>>>>>>>>>>>>>>> 2015-10-03 14:37:53.151014: osd_op(client.1328605.0:7082862 >>>>>>>>>>>>>>>>> rbd_data.13fdcb2ae8944a.000000000001264f [read 975360~4096] >>>>>>>>>>>>>>>>> 11.6d19c36f ack+read+known_if_redirected e10249) currently no flag >>>>>>>>>>>>>>>>> points reached >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> I don't know what "no flag points reached" means. >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> Just that the op hasn't been marked as reaching any interesting points >>>>>>>>>>>>>>>> (op->mark_*() calls). >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> Is it possible to gather a lot with debug ms = 20 and debug osd = 20? >>>>>>>>>>>>>>>> It's extremely verbose but it'll let us see where the op is getting >>>>>>>>>>>>>>>> blocked. If you see the "slow request" message it means the op in >>>>>>>>>>>>>>>> received by ceph (that's when the clock starts), so I suspect it's not >>>>>>>>>>>>>>>> something we can blame on the network stack. >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> sage >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> The problem is most pronounced when we have to reboot an OSD node (1 >>>>>>>>>>>>>>>>> of 13), we will have hundreds of I/O blocked for some times up to 300 >>>>>>>>>>>>>>>>> seconds. It takes a good 15 minutes for things to settle down. The >>>>>>>>>>>>>>>>> production cluster is very busy doing normally 8,000 I/O and peaking >>>>>>>>>>>>>>>>> at 15,000. This is all 4TB spindles with SSD journals and the disks >>>>>>>>>>>>>>>>> are between 25-50% full. We are currently splitting PGs to distribute >>>>>>>>>>>>>>>>> the load better across the disks, but we are having to do this 10 PGs >>>>>>>>>>>>>>>>> at a time as we get blocked I/O. We have max_backfills and >>>>>>>>>>>>>>>>> max_recovery set to 1, client op priority is set higher than recovery >>>>>>>>>>>>>>>>> priority. We tried increasing the number of op threads but this didn't >>>>>>>>>>>>>>>>> seem to help. It seems as soon as PGs are finished being checked, they >>>>>>>>>>>>>>>>> become active and could be the cause for slow I/O while the other PGs >>>>>>>>>>>>>>>>> are being checked. >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> What I don't understand is that the messages are delayed. As soon as >>>>>>>>>>>>>>>>> the message is received by Ceph OSD process, it is very quickly >>>>>>>>>>>>>>>>> committed to the journal and a response is sent back to the primary >>>>>>>>>>>>>>>>> OSD which is received very quickly as well. I've adjust >>>>>>>>>>>>>>>>> min_free_kbytes and it seems to keep the OSDs from crashing, but >>>>>>>>>>>>>>>>> doesn't solve the main problem. We don't have swap and there is 64 GB >>>>>>>>>>>>>>>>> of RAM per nodes for 10 OSDs. >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> Is there something that could cause the kernel to get a packet but not >>>>>>>>>>>>>>>>> be able to dispatch it to Ceph such that it could be explaining why we >>>>>>>>>>>>>>>>> are seeing these blocked I/O for 30+ seconds. Is there some pointers >>>>>>>>>>>>>>>>> to tracing Ceph messages from the network buffer through the kernel to >>>>>>>>>>>>>>>>> the Ceph process? >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> We can really use some pointers no matter how outrageous. We've have >>>>>>>>>>>>>>>>> over 6 people looking into this for weeks now and just can't think of >>>>>>>>>>>>>>>>> anything else. >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> Thanks, >>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNATURE----- >>>>>>>>>>>>>>>>> Version: Mailvelope v1.1.0 >>>>>>>>>>>>>>>>> Comment: https://www.mailvelope.com >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> wsFcBAEBCAAQBQJWEDY1CRDmVDuy+mK58QAARgoP/RcoL1qVmg7qbQrzStar >>>>>>>>>>>>>>>>> NK80bqYGeYHb26xHbt1fZVgnZhXU0nN0Dv4ew0e/cYJLELSO2KCeXNfXN6F1 >>>>>>>>>>>>>>>>> prZuzYagYEyj1Q1TOo+4h/nOQRYsTwQDdFzbHb/OUDN55C0QGZ29DjEvrqP6 >>>>>>>>>>>>>>>>> K5l6sAQzvQDpUEEIiOCkS6pH59ira740nSmnYkEWhr1lxF/hMjb6fFlfCFe2 >>>>>>>>>>>>>>>>> h1djM0GfY7vBHFGgI3jkw0BL5AQnWe+SCcCiKZmxY6xiR70FWl3XqK5M+nxm >>>>>>>>>>>>>>>>> iq74y7Dv6cpenit6boMr6qtOeIt+8ko85hVMh09Hkaqz/m2FzxAKLcahzkGF >>>>>>>>>>>>>>>>> Fh/M6YBzgnX7QBURTC4YQT/FVyDTW3JMuT3RKQdaX6c0iiOsVdkE+iyidWyY >>>>>>>>>>>>>>>>> Hr1KzWU23Ur9yBfZ39Y43jrsSiAEwHnKjSqMowSGljdTysNEAAZQhlqZIoHb >>>>>>>>>>>>>>>>> JlgpB39ugkHI1H5fZ5b2SIDz32/d5ywG4Gay9Rk6hp8VanvIrBbev+JYEoYT >>>>>>>>>>>>>>>>> 8/WX+fhueHt4dqUYWIl3HZ0CEzbXbug0xmFvhrbmL2f3t9XOkDZRbAjlYrGm >>>>>>>>>>>>>>>>> lswiJMDueY8JkxSnPvCQrHXqjbCcy9rMG7nTnLFz98rTcHNCwtpv0qVYhheg >>>>>>>>>>>>>>>>> 4YRNRVMbfNP/6xsJvG1wVOSQPwxZSPqJh42pDqMRePJl3Zn66MTx5wvdNDpk >>>>>>>>>>>>>>>>> l7OF >>>>>>>>>>>>>>>>> =OI++ >>>>>>>>>>>>>>>>> -----END PGP SIGNATURE----- >>>>>>>>>>>>>>>>> ---------------- >>>>>>>>>>>>>>>>> Robert LeBlanc >>>>>>>>>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> On Fri, Sep 25, 2015 at 2:40 PM, Robert LeBlanc wrote: >>>>>>>>>>>>>>>>>> We dropped the replication on our cluster from 4 to 3 and it looks >>>>>>>>>>>>>>>>>> like all the blocked I/O has stopped (no entries in the log for the >>>>>>>>>>>>>>>>>> last 12 hours). This makes me believe that there is some issue with >>>>>>>>>>>>>>>>>> the number of sockets or some other TCP issue. We have not messed with >>>>>>>>>>>>>>>>>> Ephemeral ports and TIME_WAIT at this point. There are 130 OSDs, 8 KVM >>>>>>>>>>>>>>>>>> hosts hosting about 150 VMs. Open files is set at 32K for the OSD >>>>>>>>>>>>>>>>>> processes and 16K system wide. >>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>> Does this seem like the right spot to be looking? What are some >>>>>>>>>>>>>>>>>> configuration items we should be looking at? >>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>> Thanks, >>>>>>>>>>>>>>>>>> ---------------- >>>>>>>>>>>>>>>>>> Robert LeBlanc >>>>>>>>>>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>> On Wed, Sep 23, 2015 at 1:30 PM, Robert LeBlanc wrote: >>>>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>>>>>>>>>>> Hash: SHA256 >>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>> We were able to only get ~17Gb out of the XL710 (heavily tweaked) >>>>>>>>>>>>>>>>>>> until we went to the 4.x kernel where we got ~36Gb (no tweaking). It >>>>>>>>>>>>>>>>>>> seems that there were some major reworks in the network handling in >>>>>>>>>>>>>>>>>>> the kernel to efficiently handle that network rate. If I remember >>>>>>>>>>>>>>>>>>> right we also saw a drop in CPU utilization. I'm starting to think >>>>>>>>>>>>>>>>>>> that we did see packet loss while congesting our ISLs in our initial >>>>>>>>>>>>>>>>>>> testing, but we could not tell where the dropping was happening. We >>>>>>>>>>>>>>>>>>> saw some on the switches, but it didn't seem to be bad if we weren't >>>>>>>>>>>>>>>>>>> trying to congest things. We probably already saw this issue, just >>>>>>>>>>>>>>>>>>> didn't know it. >>>>>>>>>>>>>>>>>>> - ---------------- >>>>>>>>>>>>>>>>>>> Robert LeBlanc >>>>>>>>>>>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>> On Wed, Sep 23, 2015 at 1:10 PM, Mark Nelson wrote: >>>>>>>>>>>>>>>>>>>> FWIW, we've got some 40GbE Intel cards in the community performance cluster >>>>>>>>>>>>>>>>>>>> on a Mellanox 40GbE switch that appear (knock on wood) to be running fine >>>>>>>>>>>>>>>>>>>> with 3.10.0-229.7.2.el7.x86_64. We did get feedback from Intel that older >>>>>>>>>>>>>>>>>>>> drivers might cause problems though. >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> Here's ifconfig from one of the nodes: >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> ens513f1: flags=4163 mtu 1500 >>>>>>>>>>>>>>>>>>>> inet 10.0.10.101 netmask 255.255.255.0 broadcast 10.0.10.255 >>>>>>>>>>>>>>>>>>>> inet6 fe80::6a05:caff:fe2b:7ea1 prefixlen 64 scopeid 0x20 >>>>>>>>>>>>>>>>>>>> ether 68:05:ca:2b:7e:a1 txqueuelen 1000 (Ethernet) >>>>>>>>>>>>>>>>>>>> RX packets 169232242875 bytes 229346261232279 (208.5 TiB) >>>>>>>>>>>>>>>>>>>> RX errors 0 dropped 0 overruns 0 frame 0 >>>>>>>>>>>>>>>>>>>> TX packets 153491686361 bytes 203976410836881 (185.5 TiB) >>>>>>>>>>>>>>>>>>>> TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> Mark >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> On 09/23/2015 01:48 PM, Robert LeBlanc wrote: >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>>>>>>>>>>>>> Hash: SHA256 >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> OK, here is the update on the saga... >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> I traced some more of blocked I/Os and it seems that communication >>>>>>>>>>>>>>>>>>>>> between two hosts seemed worse than others. I did a two way ping flood >>>>>>>>>>>>>>>>>>>>> between the two hosts using max packet sizes (1500). After 1.5M >>>>>>>>>>>>>>>>>>>>> packets, no lost pings. Then then had the ping flood running while I >>>>>>>>>>>>>>>>>>>>> put Ceph load on the cluster and the dropped pings started increasing >>>>>>>>>>>>>>>>>>>>> after stopping the Ceph workload the pings stopped dropping. >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> I then ran iperf between all the nodes with the same results, so that >>>>>>>>>>>>>>>>>>>>> ruled out Ceph to a large degree. I then booted in the the >>>>>>>>>>>>>>>>>>>>> 3.10.0-229.14.1.el7.x86_64 kernel and with an hour test so far there >>>>>>>>>>>>>>>>>>>>> hasn't been any dropped pings or blocked I/O. Our 40 Gb NICs really >>>>>>>>>>>>>>>>>>>>> need the network enhancements in the 4.x series to work well. >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> Does this sound familiar to anyone? I'll probably start bisecting the >>>>>>>>>>>>>>>>>>>>> kernel to see where this issue in introduced. Both of the clusters >>>>>>>>>>>>>>>>>>>>> with this issue are running 4.x, other than that, they are pretty >>>>>>>>>>>>>>>>>>>>> differing hardware and network configs. >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> Thanks, >>>>>>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNATURE----- >>>>>>>>>>>>>>>>>>>>> Version: Mailvelope v1.1.0 >>>>>>>>>>>>>>>>>>>>> Comment: https://www.mailvelope.com >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> wsFcBAEBCAAQBQJWAvOzCRDmVDuy+mK58QAApOMP/1xmCtW++G11qcE8y/sr >>>>>>>>>>>>>>>>>>>>> RkXguqZJLc4czdOwV/tjUvhVsm5qOl4wvQCtABFZpc6t4+m5nzE3LkA1rl2l >>>>>>>>>>>>>>>>>>>>> AnARPOjh61TO6cV0CT8O0DlqtHmSd2y0ElgAUl0594eInEn7eI7crz8R543V >>>>>>>>>>>>>>>>>>>>> 7I68XU5zL/vNJ9IIx38UqdhtSzXQQL664DGq3DLINK0Yb9XRVBlFip+Slt+j >>>>>>>>>>>>>>>>>>>>> cB64TuWjOPLSH09pv7SUyksodqrTq3K7p6sQkq0MOzBkFQM1FHfOipbo/LYv >>>>>>>>>>>>>>>>>>>>> F42iiQbCvFizArMu20WeOSQ4dmrXT/iecgTfEag/Zxvor2gOi/J6d2XS9ckW >>>>>>>>>>>>>>>>>>>>> byEC5/rbm4yDBua2ZugeNxQLWq0Oa7spZnx7usLsu/6YzeDNI6kmtGURajdE >>>>>>>>>>>>>>>>>>>>> /XC8bESWKveBzmGDzjff5oaMs9A1PZURYnlYADEODGAt6byoaoQEGN6dlFGe >>>>>>>>>>>>>>>>>>>>> LwQ5nOdQYuUrWpJzTJBN3aduOxursoFY8S0eR0uXm0l1CHcp22RWBDvRinok >>>>>>>>>>>>>>>>>>>>> UWk5xRBgjDCD2gIwc+wpImZbCtiTdf0vad1uLvdxGL29iFta4THzJgUGrp98 >>>>>>>>>>>>>>>>>>>>> sUqM3RaTRdJYjFcNP293H7/DC0mqpnmo0Clx3jkdHX+x1EXpJUtocSeI44LX >>>>>>>>>>>>>>>>>>>>> KWIMhe9wXtKAoHQFEcJ0o0+wrXWMevvx33HPC4q1ULrFX0ILNx5Mo0Rp944X >>>>>>>>>>>>>>>>>>>>> 4OEo >>>>>>>>>>>>>>>>>>>>> =P33I >>>>>>>>>>>>>>>>>>>>> -----END PGP SIGNATURE----- >>>>>>>>>>>>>>>>>>>>> ---------------- >>>>>>>>>>>>>>>>>>>>> Robert LeBlanc >>>>>>>>>>>>>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>> On Tue, Sep 22, 2015 at 4:15 PM, Robert LeBlanc >>>>>>>>>>>>>>>>>>>>> wrote: >>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>>>>>>>>>>>>>> Hash: SHA256 >>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> This is IPoIB and we have the MTU set to 64K. There was some issues >>>>>>>>>>>>>>>>>>>>>> pinging hosts with "No buffer space available" (hosts are currently >>>>>>>>>>>>>>>>>>>>>> configured for 4GB to test SSD caching rather than page cache). I >>>>>>>>>>>>>>>>>>>>>> found that MTU under 32K worked reliable for ping, but still had the >>>>>>>>>>>>>>>>>>>>>> blocked I/O. >>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> I reduced the MTU to 1500 and checked pings (OK), but I'm still seeing >>>>>>>>>>>>>>>>>>>>>> the blocked I/O. >>>>>>>>>>>>>>>>>>>>>> - ---------------- >>>>>>>>>>>>>>>>>>>>>> Robert LeBlanc >>>>>>>>>>>>>>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> On Tue, Sep 22, 2015 at 3:52 PM, Sage Weil wrote: >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> On Tue, 22 Sep 2015, Samuel Just wrote: >>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>> I looked at the logs, it looks like there was a 53 second delay >>>>>>>>>>>>>>>>>>>>>>>> between when osd.17 started sending the osd_repop message and when >>>>>>>>>>>>>>>>>>>>>>>> osd.13 started reading it, which is pretty weird. Sage, didn't we >>>>>>>>>>>>>>>>>>>>>>>> once see a kernel issue which caused some messages to be mysteriously >>>>>>>>>>>>>>>>>>>>>>>> delayed for many 10s of seconds? >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> Every time we have seen this behavior and diagnosed it in the wild it >>>>>>>>>>>>>>>>>>>>>>> has >>>>>>>>>>>>>>>>>>>>>>> been a network misconfiguration. Usually related to jumbo frames. >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> sage >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>> What kernel are you running? >>>>>>>>>>>>>>>>>>>>>>>> -Sam >>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>> On Tue, Sep 22, 2015 at 2:22 PM, Robert LeBlanc wrote: >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>>>>>>>>>>>>>>>>> Hash: SHA256 >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> OK, looping in ceph-devel to see if I can get some more eyes. I've >>>>>>>>>>>>>>>>>>>>>>>>> extracted what I think are important entries from the logs for the >>>>>>>>>>>>>>>>>>>>>>>>> first blocked request. NTP is running all the servers so the logs >>>>>>>>>>>>>>>>>>>>>>>>> should be close in terms of time. Logs for 12:50 to 13:00 are >>>>>>>>>>>>>>>>>>>>>>>>> available at http://162.144.87.113/files/ceph_block_io.logs.tar.xz >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:06.500374 - osd.17 gets I/O from client >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:06.557160 - osd.17 submits I/O to osd.13 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:06.557305 - osd.17 submits I/O to osd.16 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:06.573711 - osd.16 gets I/O from osd.17 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:06.595716 - osd.17 gets ondisk result=0 from osd.16 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:06.640631 - osd.16 reports to osd.17 ondisk result=0 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:36.926691 - osd.17 reports slow I/O > 30.439150 sec >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:59.790591 - osd.13 gets I/O from osd.17 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:59.812405 - osd.17 gets ondisk result=0 from osd.13 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:56:02.941602 - osd.13 reports to osd.17 ondisk result=0 >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> In the logs I can see that osd.17 dispatches the I/O to osd.13 and >>>>>>>>>>>>>>>>>>>>>>>>> osd.16 almost silmutaniously. osd.16 seems to get the I/O right away, >>>>>>>>>>>>>>>>>>>>>>>>> but for some reason osd.13 doesn't get the message until 53 seconds >>>>>>>>>>>>>>>>>>>>>>>>> later. osd.17 seems happy to just wait and doesn't resend the data >>>>>>>>>>>>>>>>>>>>>>>>> (well, I'm not 100% sure how to tell which entries are the actual data >>>>>>>>>>>>>>>>>>>>>>>>> transfer). >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> It looks like osd.17 is receiving responses to start the communication >>>>>>>>>>>>>>>>>>>>>>>>> with osd.13, but the op is not acknowledged until almost a minute >>>>>>>>>>>>>>>>>>>>>>>>> later. To me it seems that the message is getting received but not >>>>>>>>>>>>>>>>>>>>>>>>> passed to another thread right away or something. This test was done >>>>>>>>>>>>>>>>>>>>>>>>> with an idle cluster, a single fio client (rbd engine) with a single >>>>>>>>>>>>>>>>>>>>>>>>> thread. >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> The OSD servers are almost 100% idle during these blocked I/O >>>>>>>>>>>>>>>>>>>>>>>>> requests. I think I'm at the end of my troubleshooting, so I can use >>>>>>>>>>>>>>>>>>>>>>>>> some help. >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> Single Test started about >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:52:36 >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:36.926680 osd.17 192.168.55.14:6800/16726 56 : >>>>>>>>>>>>>>>>>>>>>>>>> cluster [WRN] 1 slow requests, 1 included below; oldest blocked for > >>>>>>>>>>>>>>>>>>>>>>>>> 30.439150 secs >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:36.926699 osd.17 192.168.55.14:6800/16726 57 : >>>>>>>>>>>>>>>>>>>>>>>>> cluster [WRN] slow request 30.439150 seconds old, received at >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:06.487451: >>>>>>>>>>>>>>>>>>>>>>>>> osd_op(client.250874.0:1388 rbd_data.3380e2ae8944a.0000000000000545 >>>>>>>>>>>>>>>>>>>>>>>>> [set-alloc-hint object_size 4194304 write_size 4194304,write >>>>>>>>>>>>>>>>>>>>>>>>> 0~4194304] 8.bbf3e8ff ack+ondisk+write+known_if_redirected e56785) >>>>>>>>>>>>>>>>>>>>>>>>> currently waiting for subops from 13,16 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:36.697904 osd.16 192.168.55.13:6800/29410 7 : cluster >>>>>>>>>>>>>>>>>>>>>>>>> [WRN] 2 slow requests, 2 included below; oldest blocked for > >>>>>>>>>>>>>>>>>>>>>>>>> 30.379680 secs >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:36.697918 osd.16 192.168.55.13:6800/29410 8 : cluster >>>>>>>>>>>>>>>>>>>>>>>>> [WRN] slow request 30.291520 seconds old, received at 2015-09-22 >>>>>>>>>>>>>>>>>>>>>>>>> 12:55:06.406303: >>>>>>>>>>>>>>>>>>>>>>>>> osd_op(client.250874.0:1384 rbd_data.3380e2ae8944a.0000000000000541 >>>>>>>>>>>>>>>>>>>>>>>>> [set-alloc-hint object_size 4194304 write_size 4194304,write >>>>>>>>>>>>>>>>>>>>>>>>> 0~4194304] 8.5fb2123f ack+ondisk+write+known_if_redirected e56785) >>>>>>>>>>>>>>>>>>>>>>>>> currently waiting for subops from 13,17 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:55:36.697927 osd.16 192.168.55.13:6800/29410 9 : cluster >>>>>>>>>>>>>>>>>>>>>>>>> [WRN] slow request 30.379680 seconds old, received at 2015-09-22 >>>>>>>>>>>>>>>>>>>>>>>>> 12:55:06.318144: >>>>>>>>>>>>>>>>>>>>>>>>> osd_op(client.250874.0:1382 rbd_data.3380e2ae8944a.000000000000053f >>>>>>>>>>>>>>>>>>>>>>>>> [set-alloc-hint object_size 4194304 write_size 4194304,write >>>>>>>>>>>>>>>>>>>>>>>>> 0~4194304] 8.312e69ca ack+ondisk+write+known_if_redirected e56785) >>>>>>>>>>>>>>>>>>>>>>>>> currently waiting for subops from 13,14 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:58:03.998275 osd.13 192.168.55.12:6804/4574 130 : >>>>>>>>>>>>>>>>>>>>>>>>> cluster [WRN] 1 slow requests, 1 included below; oldest blocked for > >>>>>>>>>>>>>>>>>>>>>>>>> 30.954212 secs >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:58:03.998286 osd.13 192.168.55.12:6804/4574 131 : >>>>>>>>>>>>>>>>>>>>>>>>> cluster [WRN] slow request 30.954212 seconds old, received at >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:57:33.044003: >>>>>>>>>>>>>>>>>>>>>>>>> osd_op(client.250874.0:1873 rbd_data.3380e2ae8944a.000000000000070d >>>>>>>>>>>>>>>>>>>>>>>>> [set-alloc-hint object_size 4194304 write_size 4194304,write >>>>>>>>>>>>>>>>>>>>>>>>> 0~4194304] 8.e69870d4 ack+ondisk+write+known_if_redirected e56785) >>>>>>>>>>>>>>>>>>>>>>>>> currently waiting for subops from 16,17 >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:58:03.759826 osd.16 192.168.55.13:6800/29410 10 : >>>>>>>>>>>>>>>>>>>>>>>>> cluster [WRN] 1 slow requests, 1 included below; oldest blocked for > >>>>>>>>>>>>>>>>>>>>>>>>> 30.704367 secs >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:58:03.759840 osd.16 192.168.55.13:6800/29410 11 : >>>>>>>>>>>>>>>>>>>>>>>>> cluster [WRN] slow request 30.704367 seconds old, received at >>>>>>>>>>>>>>>>>>>>>>>>> 2015-09-22 12:57:33.055404: >>>>>>>>>>>>>>>>>>>>>>>>> osd_op(client.250874.0:1874 rbd_data.3380e2ae8944a.000000000000070e >>>>>>>>>>>>>>>>>>>>>>>>> [set-alloc-hint object_size 4194304 write_size 4194304,write >>>>>>>>>>>>>>>>>>>>>>>>> 0~4194304] 8.f7635819 ack+ondisk+write+known_if_redirected e56785) >>>>>>>>>>>>>>>>>>>>>>>>> currently waiting for subops from 13,17 >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> Server IP addr OSD >>>>>>>>>>>>>>>>>>>>>>>>> nodev - 192.168.55.11 - 12 >>>>>>>>>>>>>>>>>>>>>>>>> nodew - 192.168.55.12 - 13 >>>>>>>>>>>>>>>>>>>>>>>>> nodex - 192.168.55.13 - 16 >>>>>>>>>>>>>>>>>>>>>>>>> nodey - 192.168.55.14 - 17 >>>>>>>>>>>>>>>>>>>>>>>>> nodez - 192.168.55.15 - 14 >>>>>>>>>>>>>>>>>>>>>>>>> nodezz - 192.168.55.16 - 15 >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> fio job: >>>>>>>>>>>>>>>>>>>>>>>>> [rbd-test] >>>>>>>>>>>>>>>>>>>>>>>>> readwrite=write >>>>>>>>>>>>>>>>>>>>>>>>> blocksize=4M >>>>>>>>>>>>>>>>>>>>>>> ###runtime=60 >>>>>>>>>>>>>>>>>>>>>>>>> name=rbd-test >>>>>>>>>>>>>>>>>>>>>>> ###readwrite=randwrite >>>>>>>>>>>>>>>>>>>>>>> ###bssplit=4k/85:32k/11:512/3:1m/1,4k/89:32k/10:512k/1 >>>>>>>>>>>>>>>>>>>>>>> ###rwmixread=72 >>>>>>>>>>>>>>>>>>>>>>> ###norandommap >>>>>>>>>>>>>>>>>>>>>>> ###size=1T >>>>>>>>>>>>>>>>>>>>>>> ###blocksize=4k >>>>>>>>>>>>>>>>>>>>>>>>> ioengine=rbd >>>>>>>>>>>>>>>>>>>>>>>>> rbdname=test2 >>>>>>>>>>>>>>>>>>>>>>>>> pool=rbd >>>>>>>>>>>>>>>>>>>>>>>>> clientname=admin >>>>>>>>>>>>>>>>>>>>>>>>> iodepth=8 >>>>>>>>>>>>>>>>>>>>>>> ###numjobs=4 >>>>>>>>>>>>>>>>>>>>>>> ###thread >>>>>>>>>>>>>>>>>>>>>>> ###group_reporting >>>>>>>>>>>>>>>>>>>>>>> ###time_based >>>>>>>>>>>>>>>>>>>>>>> ###direct=1 >>>>>>>>>>>>>>>>>>>>>>> ###ramp_time=60 >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> Thanks, >>>>>>>>>>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNATURE----- >>>>>>>>>>>>>>>>>>>>>>>>> Version: Mailvelope v1.1.0 >>>>>>>>>>>>>>>>>>>>>>>>> Comment: https://www.mailvelope.com >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> wsFcBAEBCAAQBQJWAcaKCRDmVDuy+mK58QAAPMsQAKBnS94fwuw0OqpPU3/z >>>>>>>>>>>>>>>>>>>>>>>>> tL8Z6TVRxrNigf721+2ClIu4LIH71bupDc3DgrrysQmmqGuvEMn68spmasWu >>>>>>>>>>>>>>>>>>>>>>>>> h9I/CqqgRpHqe4lUVoUEjyWA9/6Dbb6NiHSdpJ6p5jpGc8kZCvNS+ocDgFOl >>>>>>>>>>>>>>>>>>>>>>>>> 903i0M0E9eEMeci5O/hrMrx1FG8SN2LS8nI261aNHMOwQK0bw8wWiCJEvqVB >>>>>>>>>>>>>>>>>>>>>>>>> sz1/+jK1BJoeIYfaT9HfUXBAvfo/W3tY/vj9KbJuZJ5AMpeYPvEHu/LAr1N7 >>>>>>>>>>>>>>>>>>>>>>>>> FzzUc7a6EMlaxmSd0ML49JbV0cY9BMDjfrkKEQNKlzszlEHm3iif98QtsxbF >>>>>>>>>>>>>>>>>>>>>>>>> pPJ0hZ0G53BY3k976OWVMFm3WFRWUVOb/oiLF8H6PCm59b4LBNAg6iPNH1AI >>>>>>>>>>>>>>>>>>>>>>>>> 5XhEcPpg06M03vqUaIiY9P1kQlvnn0yCXf82IUEgmg///vhxDsHWmcwClLEn >>>>>>>>>>>>>>>>>>>>>>>>> B0VszouStTzlMYnc/2vlUiI4gFVeilWLMW00VGTWV+7V1oIzIYvWHyl2QpBq >>>>>>>>>>>>>>>>>>>>>>>>> 4/ZwVjQ43qLfuDTS4o+IJ4ztOMd26vIv6Mn6WVwKCjoCXJc8ajywR9Dy+6lL >>>>>>>>>>>>>>>>>>>>>>>>> o8oJ+tn7hMc9Qy1iBhu3/QIP4WCsUf9RVeu60oahNEpde89qW32S9CZlrJDO >>>>>>>>>>>>>>>>>>>>>>>>> gf4iTryRjkAhdmZIj9JiaE8jQ6dvN817D9cqs/CXKV9vhzYoM7p5YWHghBKB >>>>>>>>>>>>>>>>>>>>>>>>> J3hS >>>>>>>>>>>>>>>>>>>>>>>>> =0J7F >>>>>>>>>>>>>>>>>>>>>>>>> -----END PGP SIGNATURE----- >>>>>>>>>>>>>>>>>>>>>>>>> ---------------- >>>>>>>>>>>>>>>>>>>>>>>>> Robert LeBlanc >>>>>>>>>>>>>>>>>>>>>>>>> PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> On Tue, Sep 22, 2015 at 8:31 AM, Gregory Farnum wrote: >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>> On Tue, Sep 22, 2015 at 7:24 AM, Robert LeBlanc wrote: >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>>>>>>>>>>>>>>>>>>>>>>>> Hash: SHA256 >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> Is there some way to tell in the logs that this is happening? >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>> You can search for the (mangled) name _split_collection >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> I'm not >>>>>>>>>>>>>>>>>>>>>>>>>>> seeing much I/O, CPU usage during these times. Is there some way to >>>>>>>>>>>>>>>>>>>>>>>>>>> prevent the splitting? Is there a negative side effect to doing so? >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>> Bump up the split and merge thresholds. You can search the list for >>>>>>>>>>>>>>>>>>>>>>>>>> this, it was discussed not too long ago. >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> We've had I/O block for over 900 seconds and as soon as the sessions >>>>>>>>>>>>>>>>>>>>>>>>>>> are aborted, they are reestablished and complete immediately. >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> The fio test is just a seq write, starting it over (rewriting from >>>>>>>>>>>>>>>>>>>>>>>>>>> the >>>>>>>>>>>>>>>>>>>>>>>>>>> beginning) is still causing the issue. I was suspect that it is not >>>>>>>>>>>>>>>>>>>>>>>>>>> having to create new file and therefore split collections. This is >>>>>>>>>>>>>>>>>>>>>>>>>>> on >>>>>>>>>>>>>>>>>>>>>>>>>>> my test cluster with no other load. >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>> Hmm, that does make it seem less likely if you're really not creating >>>>>>>>>>>>>>>>>>>>>>>>>> new objects, if you're actually running fio in such a way that it's >>>>>>>>>>>>>>>>>>>>>>>>>> not allocating new FS blocks (this is probably hard to set up?). >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> I'll be doing a lot of testing today. Which log options and depths >>>>>>>>>>>>>>>>>>>>>>>>>>> would be the most helpful for tracking this issue down? >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>> If you want to go log diving "debug osd = 20", "debug filestore = >>>>>>>>>>>>>>>>>>>>>>>>>> 20", >>>>>>>>>>>>>>>>>>>>>>>>>> "debug ms = 1" are what the OSD guys like to see. That should spit >>>>>>>>>>>>>>>>>>>>>>>>>> out >>>>>>>>>>>>>>>>>>>>>>>>>> everything you need to track exactly what each Op is doing. >>>>>>>>>>>>>>>>>>>>>>>>>> -Greg >>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>> -- >>>>>>>>>>>>>>>>>>>>>>>>> To unsubscribe from this list: send the line "unsubscribe ceph-devel" >>>>>>>>>>>>>>>>>>>>>>>>> in >>>>>>>>>>>>>>>>>>>>>>>>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>>>>>>>>>>>>>>>>>>>>>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNATURE----- >>>>>>>>>>>>>>>>>>>>>> Version: Mailvelope v1.1.0 >>>>>>>>>>>>>>>>>>>>>> Comment: https://www.mailvelope.com >>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> wsFcBAEBCAAQBQJWAdMSCRDmVDuy+mK58QAAoEgP/AqpH7i1BLpoz6fTlfWG >>>>>>>>>>>>>>>>>>>>>> a6swvF8xvsyR15PDiPINYT0N7MgoikikGrMmhWpJ6utEr1XPW0MPFgzvNIsf >>>>>>>>>>>>>>>>>>>>>> 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unsubscribe from this list: send the line "unsubscribe ceph-devel" in >>>>>>>>>>>>>>>>>>>>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>>>>>>>>>>>>>>>>>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>> -----BEGIN PGP SIGNATURE----- >>>>>>>>>>>>>>>>>>> Version: Mailvelope v1.1.0 >>>>>>>>>>>>>>>>>>> Comment: https://www.mailvelope.com >>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>> wsFcBAEBCAAQBQJWAv3QCRDmVDuy+mK58QAABr4QAJcQj8zjl606aMdkmQG7 >>>>>>>>>>>>>>>>>>> S46iMXVav/Tv2os9GCUsQmMPx2u1w3/WmPfjByd6Divczfo0JLDDqrbsqre2 >>>>>>>>>>>>>>>>>>> lq0GNK6e8fq6FXHhPpnL+t4uFV4UZ289cma3yklRqEBDXWHlP59Hu7VpxC5l >>>>>>>>>>>>>>>>>>> 0MIcCg4wM5VM/LkrfcMven5em5CnjyFJYbActGzw9043rZoyUwCM+eL7sotl >>>>>>>>>>>>>>>>>>> JYHMcNWnqwdt8TLFDhUfVGiAQyV8/6E33CuCNUEuFGdtiBKzs9IZadOI8Ce0 >>>>>>>>>>>>>>>>>>> dod2DQNyFSvomqNq6t0DuTCSA+pT8uuks2O0NcrHjoqwIWVkxQGPYlpbpckf >>>>>>>>>>>>>>>>>>> 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http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>> -- >>>>>>>>>>>> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in >>>>>>>>>>>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>>>>>>>>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> -----BEGIN PGP SIGNATURE----- >>>>>>>>>> Version: Mailvelope v1.2.0 >>>>>>>>>> Comment: https://www.mailvelope.com >>>>>>>>>> >>>>>>>>>> wsFcBAEBCAAQBQJWFBoOCRDmVDuy+mK58QAA7oYP/1yVPx66DovoUJiSDunA >>>>>>>>>> NjIXWnKzx77aQMDwueZ0woC8PvgsX4JpLVH90Gh1MOJWyt2L4Qp+n60loSiI >>>>>>>>>> Q5xU1NMYiup8YPlHqyslBxtqCPhcN1R8XhxN212R4uyVBIgjulkkEFiiQf8R >>>>>>>>>> 5Uq5rDy+Vqmbla3enekV9vpAJQhVdfxvhdnN9/tSC3I5JZm+6VW9PGmwvTL4 >>>>>>>>>> HK5UIz8luvtBWCWXYm2m7ZCUKYq0oWfdVDGEpEV473yyYwoVyvTBFuNNNbpu >>>>>>>>>> kdxZ422Ztv2yj5phIQgU88Q/W5NY0awW25+16AMZNb6zCbF06hvQ9SjpydGu >>>>>>>>>> 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>>>>> >>>>> wsFcBAEBCAAQBQJWFXGPCRDmVDuy+mK58QAAx38P/1sn6TA8hH+F2kd1A2Pq >>>>> IU2cg1pFcH+kw21G8VO+BavfBaBoSETHEEuMXg5SszTIcL/HyziBLJos0C0j >>>>> Vu9I0/YtblQ15enzFqKFPosdc7qij9DPJxXRkx41sJZsxvSVky+URcPpcKk6 >>>>> w8Lwuq9IupesQ19ZeJkCEWFVhKz/i2E9/VXfylBgFVlkICD+5pfx6/Aq7nCP >>>>> 4gboyha07zpPlDqoA7xgT+6v2zlYC80saGcA1m2XaAUdPF/17l6Mq9+Glv7E >>>>> 3KeUf7jmMTJQRGBZSInFgUpPwUQKvF5OSGb3YQlzofUy5Es+wH3ccqZ+mlIY >>>>> szuBLAtN6zhFFPCs6016hiragiUhLk97PItXaKdDJKecuyRdShlJrXJmtX+j >>>>> NdM14TkBPTiLtAd/IZEEhIIpdvQH8YSl3LnEZ5gywggaY4Pk3JLFIJPgLpEb >>>>> T8hJnuiaQaYxERQ0nRoBL4LAXARseSrOuVt2EAD50Yb/5JEwB9FQlN758rb1 >>>>> AE/xhpK6d53+RlkPODKxXx816hXvDP6NADaC78XGmx+A4FfepdxBijGBsmOQ >>>>> 7SxAZe469K0E6EAfClc664VzwuvBEZjwTg1eK5Z6VS/FDTH/RxTKeFhlbUIT >>>>> XpezlP7XZ1/YRrJ/Eg7nb1Dv0MYQdu18tQ6QBv+C1ZsmxYLlHlcf6BZ3gNar >>>>> rZW5 >>>>> =dKn9 >>>>> -----END PGP SIGNATURE----- >>>> _______________________________________________ >>>> ceph-users mailing list >>>> ceph-users@xxxxxxxxxxxxxx >>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> >>> -- >>> WBR, Max A. Krasilnikov >>> ColoCall Data Center >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@xxxxxxxxxxxxxx >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > -- > WBR, Max A. Krasilnikov > ColoCall Data Center _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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