Malahal, I took a look inside the initrd to see what it might be doing to contribute to this. What I see is the following: ./etc/udev/rules.d/85-lvm2.rules ./etc/udev/rules.d/95-multipath.rules Looks like a vgscan is being done inside the initrd (without an lvm.conf file) before multipath is setup. Could that be the cause? -Brian Brian Elliott Finley wrote: > Malahal, > > Good call. It changed. > > So I'm wondering why does it not re-associate with a vgscan? And why is > it associated thusly in the first place? > > root@zimbra-mb1:~# vgchange -an mb1_t1 > 0 logical volume(s) in volume group "mb1_t1" now active > root@zimbra-mb1:~# vgchange -ay mb1_t1 > 6 logical volume(s) in volume group "mb1_t1" now active > root@zimbra-mb1:~# dmsetup table | egrep '^mb1_t1' > mb1_t1-redo: 0 314572800 striped 4 128 254:6 99615104 254:9 99615104 > 254:22 99615104 254:23 99615104 > mb1_t1-bin: 0 41943040 striped 4 128 254:6 384 254:9 384 254:22 384 > 254:23 384 > mb1_t1-store: 0 419430400 striped 4 128 254:6 178258304 254:9 178258304 > 254:22 178258304 254:23 178258304 > mb1_t1-db: 0 104857600 striped 4 128 254:6 20971904 254:9 20971904 > 254:22 20971904 254:23 20971904 > mb1_t1-log: 0 41943040 striped 4 128 254:6 10486144 254:9 10486144 > 254:22 10486144 254:23 10486144 > mb1_t1-index: 0 209715200 striped 4 128 254:6 47186304 254:9 47186304 > 254:22 47186304 254:23 47186304 > > -Brian > > > malahal@us.ibm.com wrote: >> Brain, >> >> Your 'dmsetup table' output didn't seem to correspond to this 'lvs' >> command output. Your 'dmsetup table' command has this entry: >> >> mb1_t1-bin: 0 41943040 striped 4 128 8:0 384 8:16 384 8:32 384 8:48 384 >> >> That clearly says your 'mb1_t1/bin' volume is triped across devices with >> major:minor numbers as 8:0, 8:16, 8:32, 8:48. The major number 8 >> normally belongs to sd driver that controls single paths. Your 'lvs ..." >> output shows that it should be stripped across >> zimbra-mb1-t1-v1_fujitsu1-lun55 and others. >> >> Your "pvs" showed multipath PV names in your first email. I believe, >> something changed when you posted your "dmsetup ls" and "dmsetup table" >> commands. >> >> --Malahal. >> PS: Does your 'dmsetup table' now show the same output as before? >> >> >> Brian Elliott Finley [finley@anl.gov] wrote: >>> Malahal, >>> >>> Here is the output from the command you suggested (I'm sure I'll be >>> using that one again -- quite handy): >>> >>> root@zimbra-mb1:~# lvs -o lv_name,vg_name,devices >>> LV VG Devices >>> >>> >>> >>> bin mb1_t1 >>> /dev/mapper/zimbra-mb1-t1-v1_fujitsu1-lun55(0),/dev/mapper/zimbra-mb1-t1-v2_fujitsu1-lun56(0),/dev/mapper/zimbra-mb1-t1-v3_fujitsu1-lun57(0),/dev/mapper/zimbra-mb1-t1-v4_fujitsu1-lun58(0) >>> >>> db mb1_t1 >>> /dev/mapper/zimbra-mb1-t1-v1_fujitsu1-lun55(2560),/dev/mapper/zimbra-mb1-t1-v2_fujitsu1-lun56(2560),/dev/mapper/zimbra-mb1-t1-v3_fujitsu1-lun57(2560),/dev/mapper/zimbra-mb1-t1-v4_fujitsu1-lun58(2560) >>> >>> index mb1_t1 >>> /dev/mapper/zimbra-mb1-t1-v1_fujitsu1-lun55(5760),/dev/mapper/zimbra-mb1-t1-v2_fujitsu1-lun56(5760),/dev/mapper/zimbra-mb1-t1-v3_fujitsu1-lun57(5760),/dev/mapper/zimbra-mb1-t1-v4_fujitsu1-lun58(5760) >>> >>> log mb1_t1 >>> /dev/mapper/zimbra-mb1-t1-v1_fujitsu1-lun55(1280),/dev/mapper/zimbra-mb1-t1-v2_fujitsu1-lun56(1280),/dev/mapper/zimbra-mb1-t1-v3_fujitsu1-lun57(1280),/dev/mapper/zimbra-mb1-t1-v4_fujitsu1-lun58(1280) >>> >>> redo mb1_t1 >>> /dev/mapper/zimbra-mb1-t1-v1_fujitsu1-lun55(12160),/dev/mapper/zimbra-mb1-t1-v2_fujitsu1-lun56(12160),/dev/mapper/zimbra-mb1-t1-v3_fujitsu1-lun57(12160),/dev/mapper/zimbra-mb1-t1-v4_fujitsu1-lun58(12160) >>> store mb1_t1 >>> /dev/mapper/zimbra-mb1-t1-v1_fujitsu1-lun55(21760),/dev/mapper/zimbra-mb1-t1-v2_fujitsu1-lun56(21760),/dev/mapper/zimbra-mb1-t1-v3_fujitsu1-lun57(21760),/dev/mapper/zimbra-mb1-t1-v4_fujitsu1-lun58(21760) >>> hsm_store1 mb1_t2 /dev/mapper/zimbra-mb1-t2-v1_fujitsu1-lun63(0) >>> >>> >>> >>> hsm_store2 mb1_t2 /dev/mapper/zimbra-mb1-t2-v2_fujitsu1-lun64(0) >>> >>> >>> >>> hsm_store2 mb1_t2 /dev/mapper/zimbra-mb1-t2-v5_fujitsu1-lun67(0) >>> >>> >>> >>> hsm_store3 mb1_t2 >>> /dev/mapper/zimbra-mb1-t2-v5_fujitsu1-lun67(3001) >>> >>> >>> hsm_store3 mb1_t2 /dev/mapper/zimbra-mb1-t2-v6_fujitsu1-lun68(0) >>> >>> >>> >>> home zimbra-mb1 /dev/md1(832) >>> >>> >>> >>> root zimbra-mb1 /dev/md1(512) >>> >>> >>> >>> swap zimbra-mb1 /dev/md1(416) >>> >>> >>> >>> tmp zimbra-mb1 /dev/md1(1152) >>> >>> >>> >>> var zimbra-mb1 /dev/md1(1472) >>> >>> >>> -Brian >>> >>> >>> malahal@us.ibm.com wrote: >>>> Try running "lvs -o lv_name,vg_name,devices". It will list your logical >>>> volumes and their backing devices. I also found that your stripes are on >>>> single path devices as Chandra found. >>>> >>>> Maybe a problem with your filter??? >>>> >>>> --Malahal. >>>> >>>> Chandra Seetharaman [sekharan@us.ibm.com] wrote: >>>>> Hi Brian, >>>>> >>>>> which of these are your LVM volumes ? >>>>> >>>>> Perusal of "dmsetup table" shows you do not have your LVM volumes on top >>>>> of multipath devices. (I an elaborate on it once I get your answer for >>>>> the question above) >>>>> >>>>> chandra >>>>> On Wed, 2009-07-15 at 17:22 -0500, Brian E. Finley wrote: >>>>>> Chandra, >>>>>> >>>>>> root@zimbra-mb1:~# dmsetup ls >>>>>> mb1_t1-redo (254, 4) >>>>>> zimbra-mb1-t2-v6_fujitsu1-lun68 (254, 29) >>>>>> zimbra--mb1-home (254, 19) >>>>>> zimbra-mb1-t2-v5_fujitsu1-lun67 (254, 24) >>>>>> mb1_t1-bin (254, 0) >>>>>> zimbra-mb1-t2-v4_fujitsu1-lun66 (254, 6) >>>>>> zimbra--mb1-var (254, 21) >>>>>> mb1_t2-hsm_store3 (254, 12) >>>>>> zimbra-mb1-t2-v3_fujitsu1-lun65 (254, 28) >>>>>> zimbra-mb1-t2-v2_fujitsu1-lun64 (254, 26) >>>>>> mb1_t2-hsm_store2 (254, 10) >>>>>> zimbra--mb1-swap (254, 17) >>>>>> zimbra-mb1-t2-v1_fujitsu1-lun63 (254, 25) >>>>>> zimbra--mb1-root (254, 18) >>>>>> 35000c5000b36aa2b (254, 11) >>>>>> mb1_t2-hsm_store1 (254, 7) >>>>>> mb1_t1-store (254, 5) >>>>>> mb1_t1-db (254, 2) >>>>>> mb1_t1-log (254, 1) >>>>>> 35000c5000b15fe7b-part2 (254, 14) >>>>>> 35000c5000b15fe7b-part1 (254, 13) >>>>>> zimbra-mb1-t1-v4_fujitsu1-lun58 (254, 9) >>>>>> zimbra-mb1-t1-v3_fujitsu1-lun57 (254, 22) >>>>>> zimbra-mb1-t1-v2_fujitsu1-lun56 (254, 27) >>>>>> zimbra-mb1-t1-v1_fujitsu1-lun55 (254, 23) >>>>>> 35000c5000b36aa2b-part2 (254, 16) >>>>>> 35000c5000b15fe7b (254, 8) >>>>>> 35000c5000b36aa2b-part1 (254, 15) >>>>>> zimbra--mb1-tmp (254, 20) >>>>>> mb1_t1-index (254, 3) >>>>>> >>>>>> >>>>>> root@zimbra-mb1:~# dmsetup table >>>>>> mb1_t1-redo: 0 314572800 striped 4 128 8:0 99615104 8:16 99615104 8:32 99615104 8:48 99615104 >>>>>> zimbra-mb1-t2-v6_fujitsu1-lun68: 0 491911168 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 66:112 1000 8:144 1000 65:48 1000 65:208 1000 >>>>>> zimbra--mb1-home: 0 20971520 linear 9:1 54526336 >>>>>> zimbra-mb1-t2-v5_fujitsu1-lun67: 0 743178240 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 65:32 1000 8:128 1000 65:192 1000 66:96 1000 >>>>>> mb1_t1-bin: 0 41943040 striped 4 128 8:0 384 8:16 384 8:32 384 8:48 384 >>>>>> zimbra-mb1-t2-v4_fujitsu1-lun66: 0 409600000 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 8:112 1000 65:16 1000 65:176 1000 66:80 1000 >>>>>> zimbra--mb1-var: 0 41943040 linear 9:1 96469376 >>>>>> mb1_t2-hsm_store3: 0 718585856 linear 65:192 24584576 >>>>>> mb1_t2-hsm_store3: 718585856 329990144 linear 65:208 384 >>>>>> zimbra-mb1-t2-v3_fujitsu1-lun65: 0 409600000 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 8:96 1000 65:0 1000 65:160 1000 66:64 1000 >>>>>> zimbra-mb1-t2-v2_fujitsu1-lun64: 0 1024000000 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 66:48 1000 8:80 1000 8:240 1000 65:144 1000 >>>>>> mb1_t2-hsm_store2: 0 1023991808 linear 8:240 384 >>>>>> mb1_t2-hsm_store2: 1023991808 24584192 linear 65:192 384 >>>>>> zimbra--mb1-swap: 0 6291456 linear 9:1 27263360 >>>>>> zimbra-mb1-t2-v1_fujitsu1-lun63: 0 1056964608 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 8:64 1000 8:224 1000 65:128 1000 66:32 1000 >>>>>> zimbra--mb1-root: 0 20971520 linear 9:1 33554816 >>>>>> 35000c5000b36aa2b: 0 286739329 multipath 0 0 1 1 round-robin 0 1 1 66:144 1000 >>>>>> mb1_t2-hsm_store1: 0 1048576000 linear 8:224 384 >>>>>> mb1_t1-store: 0 419430400 striped 4 128 8:0 178258304 8:16 178258304 8:32 178258304 8:48 178258304 >>>>>> mb1_t1-db: 0 104857600 striped 4 128 8:0 20971904 8:16 20971904 8:32 20971904 8:48 20971904 >>>>>> mb1_t1-log: 0 41943040 striped 4 128 8:0 10486144 8:16 10486144 8:32 10486144 8:48 10486144 >>>>>> 35000c5000b15fe7b-part2: 0 286326495 linear 254:8 401625 >>>>>> 35000c5000b15fe7b-part1: 0 401562 linear 254:8 63 >>>>>> zimbra-mb1-t1-v4_fujitsu1-lun58: 0 409600000 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 8:48 1000 8:208 1000 65:112 1000 66:16 1000 >>>>>> zimbra-mb1-t1-v3_fujitsu1-lun57: 0 409600000 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 65:96 1000 8:32 1000 8:192 1000 66:0 1000 >>>>>> zimbra-mb1-t1-v2_fujitsu1-lun56: 0 409600000 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 8:176 1000 8:16 1000 65:80 1000 65:240 1000 >>>>>> zimbra-mb1-t1-v1_fujitsu1-lun55: 0 409600000 multipath 1 queue_if_no_path 0 1 1 round-robin 0 4 1 8:0 1000 8:160 1000 65:64 1000 65:224 1000 >>>>>> 35000c5000b36aa2b-part2: 0 286326495 linear 254:11 401625 >>>>>> 35000c5000b15fe7b: 0 286739329 multipath 0 0 1 1 round-robin 0 1 1 66:128 1000 >>>>>> 35000c5000b36aa2b-part1: 0 401562 linear 254:11 63 >>>>>> zimbra--mb1-tmp: 0 20971520 linear 9:1 75497856 >>>>>> mb1_t1-index: 0 209715200 striped 4 128 8:0 47186304 8:16 47186304 8:32 47186304 8:48 47186304 >>>>>> >>>>>> >>>>>> Thanks, -Brian >>>>>> >>>>>> >>>>>> ----- Original Message ----- >>>>>> From: "Chandra Seetharaman" <sekharan@us.ibm.com> >>>>>> To: "Brian Elliott Finley" <finley@anl.gov>, "LVM general discussion and development" <linux-lvm@redhat.com> >>>>>> Sent: Wednesday, July 15, 2009 5:11:47 PM GMT -06:00 US/Canada Central >>>>>> Subject: Re: multipath works; lvm on multipath does not >>>>>> >>>>>> Can you send the o/p of "dmsetup ls" and "dmsetup table" >>>>>> >>>>>> On Wed, 2009-07-15 at 16:53 -0500, finley@anl.gov wrote: >>>>>>> How can I tell what is causing LVM on multipath volumes to fail, while direct multipath volumes are working? >>>>>>> >>>>>>> >>>>>>> The details: >>>>>>> >>>>>>> I have several volumes that are multipathed over fibre channel (2 qlogic cards in the host) from a Fujitsu Eternus 4000 (4 controllers). >>>>>>> >>>>>>> When using a file system mounted on the dm-multipath device directly (Ie.: generating I/O via IOZone), it fails over gracefully when I pull out either of the fibre pairs, and the file system continues to operate. This device is called /dev/mapper/zimbra-mb1-t2-v4_fujitsu1-lun66. >>>>>>> >>>>>>> However, when I access an LVM volume created with sister devices as PVs, the LVM presented volume does not fail over. Rather the LV device goes inaccessible and the file system (ext3) re-mounts itself as read-only. If I try to access any of the underlying PVs, they still respond as available (Ie.: fdisk -l $PV). >>>>>>> >>>>>>> I am not seeing duplicate devices, and am using the following filter in /etc/lvm/lvm.conf: >>>>>>> >>>>>>> filter = [ "a|^/dev/md.*|", "a|^/dev/mapper/zimbra-mb.*-t.*-v.*_.*-lun.*|", "r|.*|" ] >>>>>>> >>>>>>> >>>>>>> I have also added the following, but dm-multipath devices seem usable by LVM with or without this setting: >>>>>>> >>>>>>> types = [ "device-mapper", 1 ] >>>>>>> >>>>>>> >>>>>>> I have tried removing the /etc/lvm/cache/.cache file, but that seems to have had no effect. I've also tried re-building the initrd after modifying the lvm.conf file, also with no effect. >>>>>>> >>>>>>> Additional info: >>>>>>> root@zimbra-mb1:~# pvs >>>>>>> PV VG Fmt Attr PSize PFree >>>>>>> /dev/mapper/zimbra-mb1-t1-v1_fujitsu1-lun55 mb1_t1 lvm2 a- 195.31G 60.31G >>>>>>> /dev/mapper/zimbra-mb1-t1-v2_fujitsu1-lun56 mb1_t1 lvm2 a- 195.31G 60.31G >>>>>>> /dev/mapper/zimbra-mb1-t1-v3_fujitsu1-lun57 mb1_t1 lvm2 a- 195.31G 60.31G >>>>>>> /dev/mapper/zimbra-mb1-t1-v4_fujitsu1-lun58 mb1_t1 lvm2 a- 195.31G 60.31G >>>>>>> /dev/mapper/zimbra-mb1-t2-v1_fujitsu1-lun63 mb1_t2 lvm2 a- 504.00G 4.00G >>>>>>> /dev/mapper/zimbra-mb1-t2-v2_fujitsu1-lun64 mb1_t2 lvm2 a- 488.28G 0 >>>>>>> /dev/mapper/zimbra-mb1-t2-v3_fujitsu1-lun65 mb1_t2 lvm2 a- 195.31G 195.31G >>>>>>> /dev/mapper/zimbra-mb1-t2-v5_fujitsu1-lun67 mb1_t2 lvm2 a- 354.37G 0 >>>>>>> /dev/mapper/zimbra-mb1-t2-v6_fujitsu1-lun68 mb1_t2 lvm2 a- 234.56G 77.21G >>>>>>> /dev/md1 zimbra-mb1 lvm2 a- 136.50G 83.50G >>>>>>> >>>>>>> >>>>>>> >>>>>>> kernel version: 2.6.24-24-server >>>>>>> distoro: Ubuntu Hardy >>>>>>> multipath-tools: 0.4.8-7ubuntu2 >>>>>>> lvm2: 2.02.26-1ubuntu9 >>>>>>> >>>>>>> Thanks! >>>>>>> >>>>>>> -Brian >>>>>>> >>>>>>> _______________________________________________ >>>>>>> linux-lvm mailing list >>>>>>> linux-lvm@redhat.com >>>>>>> https://www.redhat.com/mailman/listinfo/linux-lvm >>>>>>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ >>>>> _______________________________________________ >>>>> linux-lvm mailing list >>>>> linux-lvm@redhat.com >>>>> https://www.redhat.com/mailman/listinfo/linux-lvm >>>>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ >>>> _______________________________________________ >>>> linux-lvm mailing list >>>> linux-lvm@redhat.com >>>> https://www.redhat.com/mailman/listinfo/linux-lvm >>>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ >>> -- >>> Brian Elliott Finley >>> Deputy Manager, Unix, Storage, and Operations >>> Computing and Information Systems >>> Argonne National Laboratory >>> Office: 630.252.4742 >>> Mobile: 630.447.9108 >>> >>> _______________________________________________ >>> linux-lvm mailing list >>> linux-lvm@redhat.com >>> https://www.redhat.com/mailman/listinfo/linux-lvm >>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ >> _______________________________________________ >> linux-lvm mailing list >> linux-lvm@redhat.com >> https://www.redhat.com/mailman/listinfo/linux-lvm >> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > -- Brian Elliott Finley Deputy Manager, Unix, Storage, and Operations Computing and Information Systems Argonne National Laboratory Office: 630.252.4742 Mobile: 630.447.9108 _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
