[dm-devel] Question regarding failback option in multipath.conf

Eli Klein elijah at aclue.com
Fri Oct 2 01:01:15 UTC 2009


Sorry, I forgot to mention that I did.. it didn't help.
In addition, from the output of multipath -v3, multipathd is picking up all
of the correct settings, even with the two separate default sections.

-Eli

On Thu, Oct 1, 2009 at 6:39 PM, John A. Sullivan III <
jsullivan at opensourcedevel.com> wrote:

> I don't have the expertise to help very much but did you address the
> previous comment about duplicate default blocks? Good luck - John
>
> On Thu, 2009-10-01 at 15:16 -0600, Eli Klein wrote:
> > Any ideas on this? Not sure if this e-mail made it out to the list.
> >
> >
> > Thanks!
> >
> >
> > -Eli
> >
> > On Wed, Sep 30, 2009 at 1:36 PM, Eli Klein <elijah at aclue.com> wrote:
> >
> >         On Sep 30, 2009, at 1:24 PM, John Brier wrote:
> >
> >         > On 09/30/2009 03:16 PM, Eli Klein wrote:
> >         > >
> >         > > Here's the abbreviated output from multipath -v3:
> >         > >
> >         > > mpath1: pgfailback = 120 (config file default)
> >         > > mpath1: pgpolicy = multibus (config file default)
> >         > > mpath1: selector = round-robin 0 (internal default)
> >         > > mpath1: features = 1 queue_if_no_path (internal default)
> >         > > mpath1: hwhandler = 0 (internal default)
> >         > > mpath1: rr_weight = 2 (config file default)
> >         > > mpath1: minio = 10 (config file default)
> >         > > mpath1: no_path_retry = 1 (config file default)
> >         > > pg_timeout = NONE (internal default)
> >         > > mpath1: set ACT_NOTHING (map unchanged)
> >         > >
> >         > > It's definitely picking up the settings correctly from
> >         > > multipath.conf,
> >         > > but the paths are still reinstated immediately once
> >         > > they're reconnected
> >         > > (even if it's just for a split second).
> >         > >
> >         >
> >         > What does /var/log/messages look like when this happens?
> >         > Since you changed failback to 120 did you restart multipathd
> >         > or restart the box?
> >         >
> >         > John Brier
> >         >
> >         > --
> >         > dm-devel mailing list
> >         > dm-devel at redhat.com
> >         > https://www.redhat.com/mailman/listinfo/dm-devel
> >         >
> >
> >
> >         I've tried rebooting, restarting multipath (and iscsid),
> >         flushing multipath (-F), removing all the iscsi targets
> >         completely and then reinitializing the targets.  Nothing
> >         changes the behavior.  Here's output from /var/log/messages..
> >         note the time between when the link becomes active (13:31:08)
> >         to when the path is reinstated (13:31:15):
> >
> >
> >         Sep 30 13:30:28 testbox kernel:  connection7:0: ping timeout
> >         of 5 secs expired, recv timeout 5, last rx 4470061909, last
> >         ping 4470066909, now 4470071909
> >         Sep 30 13:30:28 testbox kernel:  connection7:0: detected conn
> >         error (1011)
> >         Sep 30 13:30:28 testbox multipathd: sdf: readsector0 checker
> >         reports path is down
> >         Sep 30 13:30:28 testbox multipathd: checker failed path 8:80
> >         in map mpath0
> >         Sep 30 13:30:28 testbox multipathd: mpath0: remaining active
> >         paths: 1
> >         Sep 30 13:30:28 testbox kernel: device-mapper: multipath:
> >         Failing path 8:80.
> >         Sep 30 13:30:28 testbox iscsid: Kernel reported iSCSI
> >         connection 7:0 error (1011) state (3)
> >         Sep 30 13:30:29 testbox kernel:  connection9:0: ping timeout
> >         of 5 secs expired, recv timeout 5, last rx 4470063232, last
> >         ping 4470068232, now 4470073232
> >         Sep 30 13:30:29 testbox kernel:  connection9:0: detected conn
> >         error (1011)
> >         Sep 30 13:30:29 testbox multipathd: sdg: readsector0 checker
> >         reports path is down
> >         Sep 30 13:30:29 testbox multipathd: checker failed path 8:96
> >         in map mpath1
> >         Sep 30 13:30:29 testbox multipathd: mpath1: remaining active
> >         paths: 1
> >         Sep 30 13:30:29 testbox kernel: device-mapper: multipath:
> >         Failing path 8:96.
> >         Sep 30 13:30:30 testbox kernel:  connection11:0: ping timeout
> >         of 5 secs expired, recv timeout 5, last rx 4470064373, last
> >         ping 4470069373, now 4470074373
> >         Sep 30 13:30:30 testbox kernel:  connection11:0: detected conn
> >         error (1011)
> >         Sep 30 13:30:30 testbox iscsid: Kernel reported iSCSI
> >         connection 9:0 error (1011) state (3)
> >         Sep 30 13:30:30 testbox multipathd: sdh: readsector0 checker
> >         reports path is down
> >         Sep 30 13:30:30 testbox multipathd: checker failed path 8:112
> >         in map mpath2
> >         Sep 30 13:30:30 testbox kernel: device-mapper: multipath:
> >         Failing path 8:112.
> >         Sep 30 13:30:30 testbox multipathd: mpath2: remaining active
> >         paths: 1
> >         Sep 30 13:30:30 testbox multipathd: dm-4: add map (uevent)
> >         Sep 30 13:30:30 testbox multipathd: dm-4: devmap already
> >         registered
> >         Sep 30 13:30:30 testbox multipathd: dm-2: add map (uevent)
> >         Sep 30 13:30:30 testbox multipathd: dm-2: devmap already
> >         registered
> >         Sep 30 13:30:30 testbox multipathd: dm-3: add map (uevent)
> >         Sep 30 13:30:30 testbox multipathd: dm-3: devmap already
> >         registered
> >         Sep 30 13:30:31 testbox iscsid: Kernel reported iSCSI
> >         connection 11:0 error (1011) state (3)
> >         Sep 30 13:30:43 testbox kernel:  session7: session recovery
> >         timed out after 15 secs
> >         Sep 30 13:30:43 testbox multipathd: sdf: readsector0 checker
> >         reports path is down
> >         Sep 30 13:30:44 testbox kernel:  session9: session recovery
> >         timed out after 15 secs
> >         Sep 30 13:30:44 testbox multipathd: sdg: readsector0 checker
> >         reports path is down
> >         Sep 30 13:30:45 testbox kernel:  session11: session recovery
> >         timed out after 15 secs
> >         Sep 30 13:30:45 testbox kernel: sd 13:0:0:0: SCSI error:
> >         return code = 0x000f0000
> >         Sep 30 13:30:45 testbox kernel: end_request: I/O error, dev
> >         sdh, sector 407978223
> >         Sep 30 13:30:45 testbox multipathd: sdh: readsector0 checker
> >         reports path is down
> >         Sep 30 13:30:55 testbox multipathd: sdf: readsector0 checker
> >         reports path is down
> >         Sep 30 13:31:05 testbox multipathd: sdg: readsector0 checker
> >         reports path is down
> >         Sep 30 13:31:05 testbox multipathd: sdh: readsector0 checker
> >         reports path is down
> >         Sep 30 13:31:05 testbox multipathd: sdf: readsector0 checker
> >         reports path is down
> >         Sep 30 13:31:05 testbox multipathd: sdg: readsector0 checker
> >         reports path is down
> >         Sep 30 13:31:05 testbox multipathd: sdh: readsector0 checker
> >         reports path is down
> >         Sep 30 13:31:08 testbox iscsid: connection9:0 is operational
> >         after recovery (3 attempts)
> >         Sep 30 13:31:08 testbox iscsid: connection11:0 is operational
> >         after recovery (3 attempts)
> >         Sep 30 13:31:11 testbox iscsid: connection7:0 is operational
> >         after recovery (3 attempts)
> >         Sep 30 13:31:15 testbox multipathd: sdf: readsector0 checker
> >         reports path is up
> >         Sep 30 13:31:15 testbox multipathd: 8:80: reinstated
> >         Sep 30 13:31:15 testbox multipathd: mpath0: remaining active
> >         paths: 2
> >         Sep 30 13:31:15 testbox multipathd: sdg: readsector0 checker
> >         reports path is up
> >         Sep 30 13:31:15 testbox multipathd: 8:96: reinstated
> >         Sep 30 13:31:15 testbox multipathd: mpath1: remaining active
> >         paths: 2
> >         Sep 30 13:31:15 testbox multipathd: sdh: readsector0 checker
> >         reports path is up
> >         Sep 30 13:31:15 testbox multipathd: 8:112: reinstated
> >         Sep 30 13:31:15 testbox multipathd: mpath2: remaining active
> >         paths: 2
> >         Sep 30 13:31:15 testbox multipathd: dm-4: add map (uevent)
> >         Sep 30 13:31:15 testbox multipathd: dm-4: devmap already
> >         registered
> >         Sep 30 13:31:15 testbox multipathd: dm-2: add map (uevent)
> >         Sep 30 13:31:15 testbox multipathd: dm-2: devmap already
> >         registered
> >         Sep 30 13:31:15 testbox multipathd: dm-3: add map (uevent)
> >         Sep 30 13:31:15 testbox multipathd: dm-3: devmap already
> >         registered
> >
> >
> >
> >
> > --
> > dm-devel mailing list
> > dm-devel at redhat.com
> > https://www.redhat.com/mailman/listinfo/dm-devel
> --
> John A. Sullivan III
> Open Source Development Corporation
> +1 207-985-7880
> jsullivan at opensourcedevel.com
>
> http://www.spiritualoutreach.com
> Making Christianity intelligible to secular society
>
> --
> dm-devel mailing list
> dm-devel at redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
>
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