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Re: [linux-lvm] Multipath without round-robin?



Jedi/Sector One wrote:
Hello.
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
balancing.

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,
-Frank.



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