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Re: Poor quality of multipath-tools

On Thu, Jul 06, 2006 at 08:07:16AM -0500, John Goerzen wrote:
> On Thu, Jul 06, 2006 at 02:39:16PM +0300, Pasi Kärkkäinen wrote:
> > Not always true. Both paths can be active at the same time.. if supported by
> > the SAN array. Then you do also load balancing between the paths..
> Quite true, though my impression is that this is much more rare.  Our
> controller (HP MSA1500cs) seems to have added active/active controllers
> as a recent option.
> I'm not really sure if multipath-tools supports active/active
> controllers, though.  Do you know?

Yes, active/active is working fine:

$ multipath -ll
system (30690a018c032d43ece43440c0000d044)
[size=18 GB][features="0"][hwhandler="0"]
\_ round-robin 0 [active]
 \_ 0:0:1:0 sda 8:0  [active][ready]
 \_ 1:0:1:0 sdc 8:32 [active][ready]

that's LUN from Equallogic iSCSI SAN array.. loadbalanced with round-robin.
Box is even booted from the SAN :) took some time to create the initrd
images to set up multipathing for boot/system volume.. 

-- Pasi Kärkkäinen
                                .     .
                              /    -    \

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