[Bug 1424114] Re: lvm snapshot is not being autoextended
I did some more testing with that trusty system and it does appear to be working much better than before (i.e. not at all), though it seems there are obfuscating circumstances - AFAICT it looks like it recognizes lost causes (100.00% full snapshots) that it then no longer tries to extend, but doesn't actually inform about them in a very meaningful way. For example: Feb 12 12:39:57 hostname lvm[3325]: Logical volume lvname successfully resized Feb 12 12:39:59 hostname lvm[3325]: No longer monitoring snapshot vgname-lvname Feb 12 12:40:00 hostname lvm[3325]: dm_task_run failed, errno = 22, Invalid argument Here it did the extend but the next iteration didn't win the race and just silently dropped the ball afterwards...? Feb 12 12:44:39 hostname lvm[3325]: Snapshot vgname-lvname is now 92% full. Feb 12 12:44:40 hostname lvm[3325]: device-mapper: waitevent ioctl on failed: Interrupted system call Feb 12 12:44:40 hostname lvm[3325]: device-mapper: waitevent ioctl on failed: Interrupted system call Feb 12 12:44:44 hostname lvm[3325]: Extending logical volume lvname to 252.00 MiB Feb 12 12:44:44 hostname lvm[3325]: Monitoring snapshot vgname-lvname Feb 12 12:44:44 hostname lvm[3325]: Logical volume lvname successfully resized Feb 12 12:44:46 hostname lvm[3325]: No longer monitoring snapshot vgname-lvname Here it looked like it was winning the race but inbetween it noticing it should extend and actually extending, it actually lost the race, and then the last message came with a larger lag...? So it does appear that the original issue is fixed with the latest trusty packages, with non-trivial caveats. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424114 Title: lvm snapshot is not being autoextended To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1424114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1424114] Re: lvm snapshot is not being autoextended
@Donk yes, of course. % ps auxfw | grep '[d]'meventd root 3325 0.1 0.0 574972 18956 ?Shttps://bugs.launchpad.net/bugs/1424114 Title: lvm snapshot is not being autoextended To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1424114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1424114] Re: lvm snapshot is not being autoextended
@Josip Rodin: On Ubuntu 14, have you installed the package "dmeventd"? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424114 Title: lvm snapshot is not being autoextended To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1424114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1424114] Re: lvm snapshot is not being autoextended
It looks like it works on Ubuntu 16, syslog contains things like: Feb 10 11:28:55 hostname lvm[1704]: WARNING: Snapshot vgname-lvname is now 80.03% full. Feb 10 11:28:55 hostname lvm[1704]: Size of logical volume vgname/lvname changed from 1.00 GiB (256 extents) to 1.20 GiB (308 extents). Feb 10 11:28:55 hostname lvm[1704]: Logical volume lvname successfully resized. Feb 10 11:29:12 hostname lvm[1704]: WARNING: Snapshot vgname-lvname is now 85.65% full. Feb 10 11:29:12 hostname lvm[1704]: Size of logical volume vgname/lvname changed from 1.80 GiB (462 extents) to 2.17 GiB (555 extents). Feb 10 11:29:12 hostname lvm[1704]: Logical volume lvname successfully resized. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424114 Title: lvm snapshot is not being autoextended To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1424114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1424114] Re: lvm snapshot is not being autoextended
On Ubuntu 14, it doesn't seem to work with monitoring = 1 set, either. I had also tried doing vgchange --monitor y --poll y volumegroup, and lvcreate --snapshot --monitor y ... and there was no effect. Testing on Ubuntu 16 now -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424114 Title: lvm snapshot is not being autoextended To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1424114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1424114] Re: lvm snapshot is not being autoextended
To solve this issue, you need to install the package "dmeventd" and, in the file "/etc/lvm/lvm.conf", set the value "monitoring" to 1. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424114 Title: lvm snapshot is not being autoextended To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1424114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1424114] Re: lvm snapshot is not being autoextended
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: lvm2 (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424114 Title: lvm snapshot is not being autoextended To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1424114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1424114] Re: lvm snapshot is not being autoextended
I have seen a similar issue with Ubuntu 14.10 Repro steps: root@ubuntu-amd64:~# lsb_release -cd Description:Ubuntu 14.10 Codename: utopic # after reboot root@ubuntu-amd64:~# cat /etc/lvm/lvm.conf | grep " snapshot_autoextend" snapshot_autoextend_threshold = 80 snapshot_autoextend_percent = 20 root@ubuntu-amd64:~# vgs VG #PV #LV #SN Attr VSize VFree vg11 0 0 wz--n- 20.00g 20.00g root@ubuntu-amd64:~# lvcreate -n vol1 -L 100MB vg1 Logical volume "vol1" created root@ubuntu-amd64:~# lvs LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert vol1 vg1 -wi-a 100.00m root@ubuntu-amd64:~# lvs LVVG Attr LSize Pool Origin Data% Move Log Copy% Convert snap1 vg1 swi-a-s-- 12.00m vol1 0.00 vol1 vg1 owi-a-s-- 100.00m root@ubuntu-amd64:~# dd if=/dev/zero of=/dev/vg1/vol1 count=11 bs=1MB 11+0 records in 11+0 records out 1100 bytes (11 MB) copied, 0.087546 s, 126 MB/s root@ubuntu-amd64:~# lvs LVVG Attr LSize Pool Origin Data% Move Log Copy% Convert snap1 vg1 swi-a-s-- 12.00m vol187.83 vol1 vg1 owi-a-s-- 100.00m At this point I expected the snap1 volume to be auto extended based on the 80% setting in lvm.conf. However as can be seen the snapshot is 87% and the size stays as 12MB. If I continue writing the snapshot gets fill and disabled. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424114 Title: lvm snapshot is not being autoextended To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1424114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
