Don't see this in release notes, but there are a couple bugzilla's to which I
do not have access.
Under RHEL 5.3/device-mapper-multipath-0.4.7-23.el5_3.4, these defaults:
defaults {
path_grouping_policy group_by_prio
rr_weight priorities
prio_callout "/sbin/mpath_prio_compellent /sys/block/%n/device"
}
Create groupings like this:
gilead (36000d3100008f20000000000000001d1) dm-16 COMPELNT,Compellent Vol
[size=32G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=100][enabled]
\_ 2:0:1:20 sdaq 66:160 [active][ready]
\_ 1:0:1:20 sdw 65:96 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 4:0:0:20 sdew 129:128 [active][ready]
\_ 3:0:0:20 sdex 129:144 [active][ready]
Under RHEL 5.4/device-mapper-multipath-0.4.7-30.el5, the defaults {
path_grouping_policy } is ignored. Instead, I get multibus, verified with
multipath -v3.
Creating a new stanza devices { device { vendor "COMPELNT"\n
path_grouping_policy group_by_prio } } } works, but I don't know if this change
is intentional.
Unrelatedly, kernel-xen now breaks with previously working 82575GB quad GigE
cards. https://bugzilla.redhat.com/show_bug.cgi?id=521143
--
Rich Graves http://claimid.com/rcgraves
Carleton.edu Sr UNIX and Security Admin
CMC135: 507-222-7079 Cell: 952-292-6529
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