[linux-lvm] Multipath without round-robin?
mikenc at us.ibm.com
Fri Jun 11 20:06:03 UTC 2004
Jedi/Sector One wrote:
> I'm trying to get multipath working with LVM2 (2.6.7-rc2-udm2 kernel) with
> an LSI storage array.
> The array has two FC controllers, HBAs are two identical Qlogic 2340.
> On the array, "preferred" controllers are assigned to each LUN.
> Unfortunately, it looks like dm-multipath always does round-robin load
path0 in group0, path1 in group1 etc. When path0 fails you use path1.
Are you using multipath-tools or settiing up the table by hand. For
mp-tools there is a failover setting. You still cannot so explciit
failover but that is in the works.
> The result is that the array fills up the (SANtricity) error log with
> messages like "LUN was accessed through the wrong controller".
> Is there any way to keep failover abilities without load balancing?
> Best regards,
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