> -----Original Message----- > From: dm-devel-bounces@xxxxxxxxxx [mailto:dm-devel- > bounces@xxxxxxxxxx] On Behalf Of ml ml > Sent: Wednesday, May 16, 2012 3:42 AM > To: device-mapper development > Subject: Re: Multipath and LVM (lvdisplay takes 30Secs) > > Hi, > > >> 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 > > > > Right now i am using "path_grouping_policy failover". See below for > the full config file. > Since i want failover/redundancy. In this case i really want > "path_grouping_policy group_by_prio"? Yes, With group_by_prio you will still have failover/redundancy. > > Here is the full config file: > > > blacklist { > devnode "sda" > devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*" > devnode "^hd[a-z][[0-9]*]" > > } > > defaults { > user_friendly_names yes > udev_dir /dev > polling_interval 10 > verbosity 0 > path_grouping_policy failover > #path_grouping_policy group_by_prio > #prio rdac > > } > > multipaths { > multipath { > wwid 3600a0b80001f7557000032864ce4aff3 > alias SAN > path_grouping_policy failover > path_selector "round-robin 0" > failback manual > rr_weight priorities > no_path_retry 5 > rr_min_io 100 > } > } > > devices { > device { > vendor "IBM" > product "1722-600" > path_grouping_policy failover I will recommend to add following lines here. path_grouping_policy group_by_prio prio rdac > } > } > > > > Thanks, > 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
