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Re: [dm-devel] rdac path failure - Sun 6140



Interesting.

I just grabbed 2.6.30.4 from kernel.org and I can no longer reproduce
the issue with that kernel.  I did not add in your debugging version
of scsi_dh_rdac.c yet.

Somewhere between vmlinuz-2.6.29.4-167.fc11 and the generic 2.6.30.4
(using the same kernel .config) this problem was fixed.

Its now running over 350 MB/s with 16 sequential writers using both
active paths.




# fio --filename=/san0/vol1/test --direct=1 --rw=write --bs=8m
--size=32G --numjobs=16 --runtime=60 --group_reporting --name=file1

Run status group 0 (all jobs):
  WRITE: io=21,416MiB, aggrb=355MiB/s, minb=355MiB/s, maxb=355MiB/s,
mint=60342msec, maxt=60342msec

Disk stats (read/write):
  dm-1: ios=3/85697, merge=0/0, ticks=11/21809639, in_queue=21810085,
util=99.94%, aggrios=0/11402, aggrmerge=0/10022, aggrticks=2/2805880,
aggrin_queue=2805875, aggrutil=97.09%
    sdf: ios=0/22732, merge=0/20168, ticks=0/6090166,
in_queue=6090145, util=97.09%
    sdn: ios=3/22876, merge=0/19921, ticks=11/5133355,
in_queue=5133356, util=96.16%
    sdb: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
    sdj: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%


Thanks!
--
Stewart




On Fri, Aug 14, 2009 at 9:21 AM, Moger, Babu<Babu Moger lsi com> wrote:
>> -----Original Message-----
>> From: dm-devel-bounces redhat com [mailto:dm-devel-bounces redhat com] On
>> Behalf Of Stewart Smith
>> Sent: Friday, August 14, 2009 10:58 AM
>> To: device-mapper development
>> Subject: Re: [dm-devel] rdac path failure - Sun 6140
>>
>> I will test this today.
>>
>> Does everything look OK from a configuration standpoint?  Should the
>
>  I have verified your configuration file. It looks fine..
>
>> RDAC virtual HBA drivers from LSI be a requirement?  I am not
>> currently using them.
>
>  You can't use both the solutions at once. You are fine..
>
>> Thank you,
>> --
>> Stew
>>
>>
>>
>>
>> On Thu, Aug 13, 2009 at 5:05 PM, Moger, Babu<Babu Moger lsi com> wrote:
>> > Stew,
>> >
>> >      I don’t see much information about this failure in the logs. Right
>> now
>> > device handlers don’t provide much information on failures.  We are
>> working
>> > on to add some more debug levels.  I am attaching my draft code
>> > (scsi_dh_rdac.c) here.  Please use this only for your testing. It is not
>> > been approved/reviewed yet. I still need to submit this one to community
>> for
>> > approval. The code is attached.  Please replace this file with
>> > scsi_dh_rdac.c in the directory /driver/scsi/device_handlers and rebuild
>> the
>> > kernel.  This should give more information from the target point of
>> view.
>> > Please send me the /var/log/messages file after the failure. Let see if
>> we
>> > can get more information..
>> >
>> >
>> >
>> > Thanks
>> >
>> > Babu Moger
>> >
>> > ________________________________
>> >
>> > From: dm-devel-bounces redhat com [mailto:dm-devel-bounces redhat com]
>> On
>> > Behalf Of Stewart Smith
>> > Sent: Thursday, August 13, 2009 3:35 PM
>> > To: device-mapper development
>> > Subject: Re: [dm-devel] rdac path failure - Sun 6140
>> >
>> >
>> >
>> >
>> >
>> > Same sequence of events, with multipathd -v3
>> >
>> >
>> >
>> > Aug 13 16:28:48.627  kernel: device-mapper: multipath: Failing path
>> 8:208.
>> >
>> > Aug 13 16:28:48.000  multipathd: vol1: rr_weight = 2 (LUN setting)
>> >
>> > Aug 13 16:28:48.000  multipathd: vol1: pgfailback = -2 (controller
>> setting)
>> >
>> > Aug 13 16:28:48.000  multipathd: pg_timeout = NONE (internal default)
>> >
>> > Aug 13 16:28:48.000  multipathd: 8:208: mark as failed
>> >
>> > Aug 13 16:28:48.000  multipathd: uevent 'change' from
>> > '/devices/virtual/block/dm-1'
>> >
>> > Aug 13 16:28:48.000  multipathd: UDEV_LOG=3
>> >
>> > Aug 13 16:28:48.000  multipathd: ACTION=change
>> >
>> > Aug 13 16:28:48.000  multipathd: DEVPATH=/devices/virtual/block/dm-1
>> >
>> > Aug 13 16:28:48.000  multipathd: SUBSYSTEM=block
>> >
>> > Aug 13 16:28:48.000  multipathd: DM_TARGET=multipath
>> >
>> > Aug 13 16:28:48.000  multipathd: DM_ACTION=PATH_FAILED
>> >
>> > Aug 13 16:28:48.000  multipathd: DM_SEQNUM=1
>> >
>> > Aug 13 16:28:48.000  multipathd: DM_PATH=8:208
>> >
>> > Aug 13 16:28:48.000  multipathd: DM_NR_VALID_PATHS=3
>> >
>> > Aug 13 16:28:48.000  multipathd: DM_NAME=vol1
>> >
>> > Aug 13 16:28:48.000  multipathd:
>> > DM_UUID=mpath-3600a0b800048335200001e5d48b68a9b
>> >
>> > Aug 13 16:28:48.000  multipathd: MAJOR=253
>> >
>> > Aug 13 16:28:48.000  multipathd: MINOR=1
>> >
>> > Aug 13 16:28:48.000  multipathd: DEVTYPE=disk
>> >
>> > Aug 13 16:28:48.000  multipathd: SEQNUM=1738
>> >
>> > Aug 13 16:28:48.000  multipathd: UDEVD_EVENT=1
>> >
>> > Aug 13 16:28:48.000  multipathd: DEVNAME=/dev/dm-1
>> >
>> > Aug 13 16:28:50.000  multipathd: 8:208: reinstated
>> >
>> > Aug 13 16:28:50.000  multipathd: vol1: remaining active paths: 4
>> >
>> > Aug 13 16:28:50.000  multipathd: sdj: rdac prio = 3
>> >
>> > Aug 13 16:28:50.000  multipathd: sdn: rdac prio = 3
>> >
>> > Aug 13 16:28:50.000  multipathd: sdb: rdac prio = 0
>> >
>> > Aug 13 16:28:50.000  multipathd: sdd: rdac prio = 0
>> >
>> > Aug 13 16:28:50.763  kernel: device-mapper: multipath: Failing path
>> 8:208.
>> >
>> > Aug 13 16:28:50.000  multipathd: uevent 'change' from
>> > '/devices/virtual/block/dm-1'
>> >
>> > Aug 13 16:28:50.000  multipathd: UDEV_LOG=3
>> >
>> > Aug 13 16:28:50.000  multipathd: ACTION=change
>> >
>> > Aug 13 16:28:50.000  multipathd: DEVPATH=/devices/virtual/block/dm-1
>> >
>> > Aug 13 16:28:50.000  multipathd: SUBSYSTEM=block
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_TARGET=multipath
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_ACTION=PATH_REINSTATED
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_SEQNUM=2
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_PATH=8:208
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_NR_VALID_PATHS=4
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_NAME=vol1
>> >
>> > Aug 13 16:28:50.000  multipathd:
>> > DM_UUID=mpath-3600a0b800048335200001e5d48b68a9b
>> >
>> > Aug 13 16:28:50.000  multipathd: MAJOR=253
>> >
>> > Aug 13 16:28:50.000  multipathd: MINOR=1
>> >
>> > Aug 13 16:28:50.000  multipathd: DEVTYPE=diskAug 13 16:28:50.000
>> >  multipathd: SEQNUM=1739Aug 13 16:28:50.000  multipathd: UDEVD_EVENT=1
>> >
>> > Aug 13 16:28:50.000  multipathd: vol1: rr_weight = 2 (LUN setting)
>> >
>> > Aug 13 16:28:50.000  multipathd: vol1: pgfailback = -2 (controller
>> setting)
>> >
>> > Aug 13 16:28:50.000  multipathd: pg_timeout = NONE (internal default)
>> >
>> > Aug 13 16:28:50.000  multipathd: 8:208: mark as failed
>> >
>> > Aug 13 16:28:50.000  multipathd: vol1: remaining active paths: 3
>> >
>> > Aug 13 16:28:50.000  multipathd: vol1: rr_weight = 2 (LUN setting)
>> >
>> > Aug 13 16:28:50.000  multipathd: vol1: pgfailback = -2 (controller
>> setting)
>> >
>> > Aug 13 16:28:50.000  multipathd: uevent 'change' from
>> > '/devices/virtual/block/dm-1'
>> >
>> > Aug 13 16:28:50.000  multipathd: UDEV_LOG=3
>> >
>> > Aug 13 16:28:50.000  multipathd: ACTION=change
>> >
>> > Aug 13 16:28:50.000  multipathd: DEVPATH=/devices/virtual/block/dm-1
>> >
>> > Aug 13 16:28:50.000  multipathd: SUBSYSTEM=block
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_TARGET=multipath
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_ACTION=PATH_FAILED
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_SEQNUM=3
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_PATH=8:208
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_NR_VALID_PATHS=3
>> >
>> > Aug 13 16:28:50.000  multipathd: DM_NAME=vol1
>> >
>> > Aug 13 16:28:50.000  multipathd:
>> > DM_UUID=mpath-3600a0b800048335200001e5d48b68a9b
>> >
>> > Aug 13 16:28:50.000  multipathd: MAJOR=253
>> >
>> > Aug 13 16:28:50.000  multipathd: MINOR=1
>> >
>> > Aug 13 16:28:50.000  multipathd: DEVTYPE=disk
>> >
>> > Aug 13 16:28:50.000  multipathd: SEQNUM=1740
>> >
>> > Aug 13 16:28:50.000  multipathd: UDEVD_EVENT=1
>> >
>> > Aug 13 16:28:50.000  multipathd: DEVNAME=/dev/dm-1
>> >
>> > Aug 13 16:29:00.000  multipathd: 8:208: reinstated
>> >
>> > Aug 13 16:29:00.000  multipathd: vol1: remaining active paths: 4
>> >
>> > Aug 13 16:29:00.000  multipathd: sdj: rdac prio = 3
>> >
>> > Aug 13 16:29:00.000  multipathd: sdn: rdac prio = 3
>> >
>> > Aug 13 16:29:00.000  multipathd: sdb: rdac prio = 0
>> >
>> > Aug 13 16:29:00.000  multipathd: sdd: rdac prio = 0
>> >
>> > Aug 13 16:29:00.000  multipathd: vol1: rr_weight = 2 (LUN setting)
>> >
>> > Aug 13 16:29:00.000  multipathd: vol1: pgfailback = -2 (controller
>> setting)
>> >
>> > Aug 13 16:29:00.000  multipathd: uevent 'change' from
>> > '/devices/virtual/block/dm-1'
>> >
>> > Aug 13 16:29:00.000  multipathd: UDEV_LOG=3
>> >
>> > Aug 13 16:29:00.000  multipathd: ACTION=change
>> >
>> > Aug 13 16:29:00.000  multipathd: DEVPATH=/devices/virtual/block/dm-1
>> >
>> > Aug 13 16:29:00.000  multipathd: SUBSYSTEM=block
>> >
>> > Aug 13 16:29:00.000  multipathd: DM_TARGET=multipath
>> >
>> > Aug 13 16:29:00.000  multipathd: DM_ACTION=PATH_REINSTATED
>> >
>> > Aug 13 16:29:00.000  multipathd: DM_SEQNUM=4
>> >
>> > Aug 13 16:29:00.000  multipathd: DM_PATH=8:208
>> >
>> > Aug 13 16:29:00.000  multipathd: DM_NR_VALID_PATHS=4
>> >
>> > Aug 13 16:29:00.000  multipathd: DM_NAME=vol1
>> >
>> > Aug 13 16:29:00.000  multipathd:
>> > DM_UUID=mpath-3600a0b800048335200001e5d48b68a9b
>> >
>> > Aug 13 16:29:00.000  multipathd: MAJOR=253
>> >
>> > Aug 13 16:29:00.000  multipathd: MINOR=1
>> >
>> > Aug 13 16:29:00.000  multipathd: DEVTYPE=disk
>> >
>> > Aug 13 16:29:00.000  multipathd: SEQNUM=1741
>> >
>> > Aug 13 16:29:00.000  multipathd: UDEVD_EVENT=1
>> >
>> > Aug 13 16:29:00.000  multipathd: DEVNAME=/dev/dm-1
>> >
>> > Aug 13 16:29:02.753  kernel: device-mapper: multipath: Failing path
>> 8:208.
>> >
>> > Aug 13 16:29:02.000  multipathd: vol1: rr_weight = 2 (LUN setting)
>> >
>> > Aug 13 16:29:02.000  multipathd: vol1: pgfailback = -2 (controller
>> setting)
>> >
>> > Aug 13 16:29:02.000  multipathd: pg_timeout = NONE (internal default)
>> >
>> > Aug 13 16:29:02.000  multipathd: 8:208: mark as failed
>> >
>> > Aug 13 16:29:02.000  multipathd: uevent 'change' from
>> > '/devices/virtual/block/dm-1'
>> >
>> > Aug 13 16:29:02.000  multipathd: UDEV_LOG=3
>> >
>> > Aug 13 16:29:02.000  multipathd: ACTION=change
>> >
>> > Aug 13 16:29:02.000  multipathd: DEVPATH=/devices/virtual/block/dm-1
>> >
>> > Aug 13 16:29:02.000  multipathd: SUBSYSTEM=block
>> >
>> > Aug 13 16:29:02.000  multipathd: DM_TARGET=multipath
>> >
>> > Aug 13 16:29:02.000  multipathd: DM_ACTION=PATH_FAILED
>> >
>> > Aug 13 16:29:02.000  multipathd: DM_SEQNUM=5
>> >
>> > Aug 13 16:29:02.000  multipathd: DM_PATH=8:208
>> >
>> > Aug 13 16:29:02.000  multipathd: DM_NR_VALID_PATHS=3
>> >
>> > Aug 13 16:29:02.000  multipathd: DM_NAME=vol1
>> >
>> > Aug 13 16:29:02.000  multipathd:
>> > DM_UUID=mpath-3600a0b800048335200001e5d48b68a9b
>> >
>> > Aug 13 16:29:02.000  multipathd: MAJOR=253
>> >
>> > Aug 13 16:29:02.000  multipathd: MINOR=1
>> >
>> > Aug 13 16:29:02.000  multipathd: DEVTYPE=disk
>> >
>> > Aug 13 16:29:02.000  multipathd: SEQNUM=1742
>> >
>> > Aug 13 16:29:02.000  multipathd: UDEVD_EVENT=1
>> >
>> > Aug 13 16:29:02.000  multipathd: DEVNAME=/dev/dm-1
>> >
>> > Aug 13 16:29:10.000  multipathd: 8:208: reinstated
>> >
>> > Aug 13 16:29:10.000  multipathd: vol1: remaining active paths: 4
>> >
>> > Aug 13 16:29:10.000  multipathd: sdj: rdac prio = 3
>> >
>> > Aug 13 16:29:10.000  multipathd: sdn: rdac prio = 3
>> >
>> > Aug 13 16:29:10.000  multipathd: sdb: rdac prio = 0
>> >
>> > Aug 13 16:29:10.000  multipathd: sdd: rdac prio = 0
>> >
>> > Aug 13 16:29:10.000  multipathd: vol1: rr_weight = 2 (LUN setting)
>> >
>> > Aug 13 16:29:10.000  multipathd: vol1: pgfailback = -2 (controller
>> setting)
>> >
>> > Aug 13 16:29:10.000  multipathd: uevent 'change' from
>> > '/devices/virtual/block/dm-1'
>> >
>> > Aug 13 16:29:10.000  multipathd: UDEV_LOG=3
>> >
>> > Aug 13 16:29:10.000  multipathd: ACTION=change
>> >
>> > Aug 13 16:29:10.000  multipathd: DEVPATH=/devices/virtual/block/dm-1
>> >
>> > Aug 13 16:29:10.000  multipathd: SUBSYSTEM=block
>> >
>> > Aug 13 16:29:10.000  multipathd: DM_TARGET=multipath
>> >
>> > Aug 13 16:29:10.000  multipathd: DM_ACTION=PATH_REINSTATED
>> >
>> > Aug 13 16:29:10.000  multipathd: DM_SEQNUM=6
>> >
>> > Aug 13 16:29:10.000  multipathd: DM_PATH=8:208
>> >
>> > Aug 13 16:29:10.000  multipathd: DM_NR_VALID_PATHS=4
>> >
>> > Aug 13 16:29:10.000  multipathd: DM_NAME=vol1
>> >
>> > Aug 13 16:29:10.000  multipathd:
>> > DM_UUID=mpath-3600a0b800048335200001e5d48b68a9b
>> >
>> > Aug 13 16:29:10.000  multipathd: MAJOR=253
>> >
>> > Aug 13 16:29:10.000  multipathd: MINOR=1
>> >
>> > Aug 13 16:29:10.000  multipathd: DEVTYPE=disk
>> >
>> > Aug 13 16:29:10.000  multipathd: SEQNUM=1743
>> >
>> > Aug 13 16:29:10.000  multipathd: UDEVD_EVENT=1
>> >
>> > Aug 13 16:29:10.000  multipathd: DEVNAME=/dev/dm-1
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > On Thu, Aug 13, 2009 at 1:27 PM, Stewart Smith <stew cleepdar com>
>> wrote:
>> >
>> >
>> >
>> > after a fresh, multipath -F and start of multipathd with -v 2 I see the
>> > following messages.
>> >
>> >
>> >
>> > After starting multipathd I mounted /dev/mapper/vol1 and generated some
>> > simple I/O to it using dd
>> >
>> >
>> >
>> >
>> >
>> > Aug 13 16:23:14.888 localhost kernel: device-mapper: multipath: Failing
>> path
>> > 8:208.
>> >
>> > Aug 13 16:23:14.000 localhost multipathd: 8:208: mark as failed
>> >
>> > Aug 13 16:23:16.000 localhost multipathd: 8:208: reinstated
>> >
>> > Aug 13 16:23:30.462 localhost kernel: device-mapper: multipath: Failing
>> path
>> > 8:208.
>> >
>> > Aug 13 16:23:30.000 localhost multipathd: 8:208: mark as failed
>> >
>> > Aug 13 16:23:39.000 localhost multipathd: 8:208: reinstated
>> >
>> > Aug 13 16:23:46.430 localhost kernel: device-mapper: multipath: Failing
>> path
>> > 8:208.
>> >
>> > Aug 13 16:23:46.000 localhost multipathd: 8:208: mark as failed
>> >
>> > Aug 13 16:23:51.041 localhost kernel: device-mapper: multipath: Failing
>> path
>> > 8:208.
>> >
>> > Aug 13 16:23:51.000 localhost multipathd: 8:208: mark as failed
>> >
>> > Aug 13 16:23:59.000 localhost multipathd: 8:208: reinstated
>> >
>> > Aug 13 16:24:06.465 localhost kernel: device-mapper: multipath: Failing
>> path
>> > 8:208.
>> >
>> > Aug 13 16:24:06.000 localhost multipathd: 8:208: mark as failed
>> >
>> > Aug 13 16:24:09.000 localhost multipathd: 8:208: reinstated
>> >
>> >
>> >
>> >
>> >
>> > Thanks,
>> >
>> > --
>> >
>> > Stew
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > On Thu, Aug 13, 2009 at 12:42 PM, Moger, Babu <Babu Moger lsi com>
>> wrote:
>> >
>> > Do you have /var/log/messages file for this problem?
>> >
>> > Thanks
>> > Babu Moger
>> >
>> >> -----Original Message-----
>> >> From: dm-devel-bounces redhat com [mailto:dm-devel-bounces redhat com]
>> On
>> >> Behalf Of Stewart Smith
>> >> Sent: Thursday, August 13, 2009 1:51 PM
>> >> To: dm-devel redhat com
>> >> Subject: [dm-devel] rdac path failure - Sun 6140
>> >>
>> >> Hello All,
>> >>
>> >> I am seeing many of these messages when my Sun 6140 array is under
>> heavy
>> >> I/O
>> >> device-mapper: multipath: Failing path 8:208.
>> >> device-mapper: multipath: Failing path 8:208.
>> >> device-mapper: multipath: Failing path 8:208.
>> >> device-mapper: multipath: Failing path 8:208.
>> >> device-mapper: multipath: Failing path 8:208.
>> >>
>> >>
>> >> I am running a Fedora 10 server, with two fiber connections to two
>> >> different switches.  Both controllers on the 6140 have one connection
>> >> to each switch as well.  The end result is that I see four paths to
>> >> each LUN.
>> >>
>> >> When the volume is mounted and under significant load I see the
>> >> messages above every few seconds.  They seem to appear every
>> >> "no_path_retry" seconds.
>> >>
>> >> The 6140 controller firmware is up to date at version 07.50.08.10 and
>> >> I have installed the latest firmware for my Emulex LPe11002 cards.  I
>> >> have reproduced the problem using both Cisco MDS and Brocade fiber
>> >> channel switches as well.
>> >>
>> >> Using CAM, I have set the initiator Host Type to "Linux" at the
>> >> moment.  I have tried other options as well without success.
>> >>
>> >> I have NOT installed the RDAC drivers from either Sun or LSI -
>> >> primarily because they do not seem to build on my Fedora 10 kernel.
>> >>
>> >> Any ideas would be greatly appreciated!!!
>> >>
>> >> configs and debugging multipathd output is below.
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> Kernel: 2.6.27.24-170.2.68.fc10.x86_64
>> >>
>> >> # multipath -lll
>> >> vol1 (3600a0b800048335200001e5d48b68a9b) dm-1 SUN,CSM200_R
>> >> [size=12T][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
>> >> \_ round-robin 0 [prio=6][active]
>> >>  \_ 5:0:1:2 sdj 8:144 [active][ready]
>> >>  \_ 2:0:1:2 sdn 8:208 [active][ready]
>> >> \_ round-robin 0 [prio=0][enabled]
>> >>  \_ 2:0:0:2 sdb 8:16  [active][ghost]
>> >>  \_ 5:0:0:2 sdd 8:48  [active][ghost]
>> >>
>> >>
>> >> # cat /etc/multipath.conf
>> >>
>> >> blacklist {
>> >>         devnode "^sd[a-z][[0-9]*]"
>> >>         devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
>> >>         devnode "^hd[a-z][0-9]*"
>> >>         devnode "^cciss!c[0-9]d[0-9](p[0-9]*)*"
>> >> }
>> >>
>> >> defaults {
>> >>         udev_dir                /dev
>> >>         polling_interval        10
>> >>         selector                "round-robin 0"
>> >>         path_grouping_policy    multibus
>> >>         getuid_callout          "/sbin/scsi_id --whitelisted /dev/%n"
>> >>         prio                    alua
>> >>         path_checker            readsector0
>> >>         rr_min_io               100
>> >>         max_fds                 8192
>> >>         rr_weight               priorities
>> >>         failback                immediate
>> >>         no_path_retry           fail
>> >>         user_friendly_names     yes
>> >> }
>> >> devices {
>> >>         device {
>> >>                 vendor                  "SUN"
>> >>                 product                 "CSM200_R"
>> >>                 product_blacklist       "Universal Xport"
>> >>                 getuid_callout          "/sbin/scsi_id --whitelisted
>> >> /dev/%n"
>> >>                 features                "0"
>> >>                 hardware_handler        "1 rdac"
>> >>                 path_selector           "round-robin 0"
>> >>                 path_grouping_policy    group_by_prio
>> >>                 failback                immediate
>> >>                 rr_weight               uniform
>> >>                 no_path_retry           queue
>> >>                 rr_min_io               1000
>> >>                 path_checker            rdac
>> >>                 prio                    rdac
>> >>         }
>> >> }
>> >>
>> >> multipaths {
>> >>         multipath {
>> >>                 wwid
>>  3600a0b800048335200001e5d48b68a9b
>> >>                 alias                   vol1
>> >>                 rr_weight               priorities
>> >>                 no_path_retry           5
>> >>                 rr_min_io               100
>> >>         }
>> >> }
>> >>
>> >>
>> >>
>> >> # multipathd -d v3
>> >>
>> >>
>> >> Aug 13 14:48:53 | sdb: ownership set to vol1
>> >> Aug 13 14:48:53 | sdb: not found in pathvec
>> >> Aug 13 14:48:53 | sdb: mask = 0xc
>> >> Aug 13 14:48:53 | sdb: path checker = rdac (controller setting)
>> >> Aug 13 14:48:53 | sdb: state = 4
>> >> Aug 13 14:48:53 | sdb: rdac prio = 0
>> >> Aug 13 14:48:53 | sdd: ownership set to vol1
>> >> Aug 13 14:48:53 | sdd: not found in pathvec
>> >> Aug 13 14:48:53 | sdd: mask = 0xc
>> >> Aug 13 14:48:53 | sdd: path checker = rdac (controller setting)
>> >> Aug 13 14:48:53 | sdd: state = 4
>> >> Aug 13 14:48:53 | sdd: rdac prio = 0
>> >> Aug 13 14:48:53 | sdj: ownership set to vol1
>> >> Aug 13 14:48:53 | sdj: not found in pathvec
>> >> Aug 13 14:48:53 | sdj: mask = 0xc
>> >> Aug 13 14:48:53 | sdj: path checker = rdac (controller setting)
>> >> Aug 13 14:48:53 | sdj: state = 2
>> >> Aug 13 14:48:53 | sdj: rdac prio = 3
>> >> Aug 13 14:48:53 | sdn: ownership set to vol1
>> >> Aug 13 14:48:53 | sdn: not found in pathvec
>> >> Aug 13 14:48:53 | sdn: mask = 0xc
>> >> Aug 13 14:48:53 | sdn: path checker = rdac (controller setting)
>> >> Aug 13 14:48:53 | sdn: state = 2
>> >> Aug 13 14:48:53 | sdn: rdac prio = 3
>> >> Aug 13 14:48:53 | vol1: pgfailback = -2 (controller setting)
>> >> Aug 13 14:48:53 | vol1: pgpolicy = group_by_prio (controller setting)
>> >> Aug 13 14:48:53 | vol1: selector = round-robin 0 (controller setting)
>> >> Aug 13 14:48:53 | vol1: features = 0 (controller setting)
>> >> Aug 13 14:48:53 | vol1: hwhandler = 1 rdac (controller setting)
>> >> Aug 13 14:48:53 | vol1: rr_weight = 2 (LUN setting)
>> >> Aug 13 14:48:53 | vol1: minio = 100 (LUN setting)
>> >> Aug 13 14:48:53 | vol1: no_path_retry = 5 (multipath setting)
>> >> Aug 13 14:48:53 | pg_timeout = NONE (internal default)
>> >> Aug 13 14:48:53 | vol1: set ACT_CREATE (map does not exist)
>> >> create: vol1 (3600a0b800048335200001e5d48b68a9b) n/a SUN,CSM200_R
>> >> [size=12T][features=0][hwhandler=1 rdac][n/a]
>> >> \_ round-robin 0 [prio=6][undef]
>> >>  \_ 5:0:1:2 sdj 8:144 [undef][ready]
>> >>  \_ 2:0:1:2 sdn 8:208 [undef][ready]
>> >> \_ round-robin 0 [prio=0][undef]
>> >>  \_ 2:0:0:2 sdb 8:16 [undef][ghost]
>> >>  \_ 5:0:0:2 sdd 8:48 [undef][ghost]
>> >>
>> >
>> >> --
>> >> dm-devel mailing list
>> >> dm-devel redhat com
>> >> https://www.redhat.com/mailman/listinfo/dm-devel
>> >
>> > --
>> > dm-devel mailing list
>> > dm-devel redhat com
>> > https://www.redhat.com/mailman/listinfo/dm-devel
>> >
>> >
>> >
>> >
>>
>> --
>> dm-devel mailing list
>> dm-devel redhat com
>> https://www.redhat.com/mailman/listinfo/dm-devel
>
> --
> dm-devel mailing list
> dm-devel redhat com
> https://www.redhat.com/mailman/listinfo/dm-devel
>


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