Thanks for getting back to me Tore, Hannes, and Eckebrecht.
I've downloaded and installed the latest device-mapper-multipath rpm
from Redhat. It's still only beta but I figured I give it a try. I see
that there's an rdac checker in there but I don't see a hardware
handler.
Is anyone running RHEL against a Sun 6140 SAN? Trying to get a
definitive answer from Redhat on their support for this SAN has been
impossible. The mailing list hasn't been too helpful either.
If RDAC is the way to go
1. do I need to use a hardware handler? There doesn't seem to be one
in their latest RPM.
2. What Host type do I chose on the SAN?
3. What should the path grouping policy by? Tore: you mentioned using
group_by_serial
4. What should the path checker be?
I'm going to take a stab at it and guess this, can anyone confirm?:
/etc/multipath.conf
defaults
{
udev_dir /dev
polling_interval 10
selector "round-robin 0"
path_grouping_policy group_by_serial
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_rdac /dev/%n"
path_checker tur
rr_min_io 100
rr_weight uniform
failback immediate
no_path_retry queue
user_friendly_name yes
}
devices
{
device
{
vendor "SUN"
product "CSM200_R"
path_grouping_policy group_by_prio
path_checker tur
prio_callout "/sbin/mpath_prio_rdac /dev/%n"
getuid_callout "/sbin/scsi_id -g -u -s
/block/%n"
rr_weight uniform
rr_min_io 1000
features "1 queue_if_no_path"
}
}
cheers,
--james
--
dm-devel mailing list
dm-devel@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/dm-devel
