> -----Original Message----- > From: dm-devel-bounces@xxxxxxxxxx [mailto:dm-devel- > bounces@xxxxxxxxxx] On Behalf Of ml ml > Sent: Tuesday, May 15, 2012 5:15 AM > To: dm-devel@xxxxxxxxxx > Subject: Multipath and LVM (lvdisplay takes 30Secs) > > Hello List, > > i am using multipath for redundance reasons. But something seems to be > dodgy. > > "lvdisplay" takes 30Seconds. > > "multipath" -l shows nothing > > multipath -l -v 2 > SAN (3600a0b80001f7557000032864ce4aff3) dm-0 IBM,1722-600 > size=250G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw > |-+- policy='round-robin 0' prio=-1 status=active > | `- 2:0:1:0 sdb 8:16 active undef running > |-+- policy='round-robin 0' prio=-1 status=enabled > | `- 3:0:1:0 sdd 8:48 active undef running > `-+- policy='round-robin 0' prio=-1 status=enabled > `- 3:0:0:0 sdc 8:32 active undef running Prio is showing -1. May be your path grouping policy and prio handler is not set right. I would set it correctly and then test it again. Here is how I would set it in multipath.conf. path_grouping_policy group_by_prio prio rdac > > Any idea why lvmdisplay takes so long? If i can see its trying to read > from sda, dm-1, sdb, dm-1 where the "read(3, " operations need some > time each time. > > Here is some more info: > > multipath -l -v 3 > May 15 12:10:06 | sdb: not found in pathvec > May 15 12:10:06 | sdb: mask = 0x1 > May 15 12:10:06 | sdb: dev_t = 8:16 > May 15 12:10:06 | sdb: size = 524288000 > May 15 12:10:06 | sdb: subsystem = scsi > May 15 12:10:06 | sdb: vendor = IBM > May 15 12:10:06 | sdb: product = 1722-600 > May 15 12:10:06 | sdb: rev = 0914 > May 15 12:10:06 | sdb: h:b:t:l = 2:0:1:0 > May 15 12:10:06 | sdb: tgt_node_name = 0x200400a0b816fb7 > May 15 12:10:06 | sda: device node name blacklisted > May 15 12:10:06 | sdd: not found in pathvec > May 15 12:10:06 | sdd: mask = 0x1 > May 15 12:10:06 | sdd: dev_t = 8:48 > May 15 12:10:06 | sdd: size = 524288000 > May 15 12:10:06 | sdd: subsystem = scsi > May 15 12:10:06 | sdd: vendor = IBM > May 15 12:10:06 | sdd: product = 1722-600 > May 15 12:10:06 | sdd: rev = 0914 > May 15 12:10:06 | sdd: h:b:t:l = 3:0:1:0 > May 15 12:10:06 | sdd: tgt_node_name = 0x200400a0b816fb7 > May 15 12:10:06 | sdc: not found in pathvec > May 15 12:10:06 | sdc: mask = 0x1 > May 15 12:10:06 | sdc: dev_t = 8:32 > May 15 12:10:06 | sdc: size = 524288000 > May 15 12:10:06 | sdc: subsystem = scsi > May 15 12:10:06 | sdc: vendor = IBM > May 15 12:10:06 | sdc: product = 1722-600 > May 15 12:10:06 | sdc: rev = 0914 > May 15 12:10:06 | sdc: h:b:t:l = 3:0:0:0 > May 15 12:10:06 | sdc: tgt_node_name = 0x200400a0b816fb7 > May 15 12:10:06 | dm-0: device node name blacklisted > May 15 12:10:06 | dm-1: device node name blacklisted > May 15 12:10:06 | dm-2: device node name blacklisted > May 15 12:10:06 | dm-3: device node name blacklisted > May 15 12:10:06 | loop0: device node name blacklisted > May 15 12:10:06 | loop1: device node name blacklisted > May 15 12:10:06 | loop2: device node name blacklisted > May 15 12:10:06 | loop3: device node name blacklisted > May 15 12:10:06 | loop4: device node name blacklisted > May 15 12:10:06 | loop5: device node name blacklisted > May 15 12:10:06 | loop6: device node name blacklisted > May 15 12:10:06 | loop7: device node name blacklisted > May 15 12:10:06 | dm-4: device node name blacklisted > May 15 12:10:06 | dm-5: device node name blacklisted > May 15 12:10:06 | dm-6: device node name blacklisted > ===== paths list ===== > uuid hcil dev dev_t pri dm_st chk_st vend/prod/rev dev_st > 2:0:1:0 sdb 8:16 -1 undef undef IBM,1722-600 running > 3:0:1:0 sdd 8:48 -1 undef undef IBM,1722-600 running > 3:0:0:0 sdc 8:32 -1 undef undef IBM,1722-600 running > May 15 12:10:06 | params = 1 queue_if_no_path 1 rdac 3 1 round-robin 0 > 1 1 8:16 600 round-robin 0 1 1 8:48 600 round-robin 0 1 1 8:32 100 > May 15 12:10:06 | status = 2 0 1 0 3 1 A 0 1 0 8:16 A 0 E 0 1 0 8:48 A > 0 E 0 1 0 8:32 A 0 > SAN (3600a0b80001f7557000032864ce4aff3) dm-0 IBM,1722-600 > size=250G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw > |-+- policy='round-robin 0' prio=-1 status=active > | `- 2:0:1:0 sdb 8:16 active undef running > |-+- policy='round-robin 0' prio=-1 status=enabled > | `- 3:0:1:0 sdd 8:48 active undef running > `-+- policy='round-robin 0' prio=-1 status=enabled > `- 3:0:0:0 sdc 8:32 active undef running > > Any idea whats wrong here? > > Thanks a lot, > Mario > > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
