Re: [dm-devel] Can I configure priority?

[Chandra Seetharaman <sekharan us ibm com>]

On Tue, 2008-10-14 at 13:08 -0500, Scott Moseman wrote:
> RHEL v5
> eth + hba
> 
> If I'm using 'multibus' for my 'path_grouping_policy' in order to
> utilize all of the channels, is there any way to prioritize how the 2
If you use multibus, all the paths will be used in round-robin fashion.
You will not be able to prioritize.

> interfaces are used?  For instance, if we prefer to have the traffic,
> when the bandwidth doesn't exceed a single channel, using the HBA
> first and ETH second?  How does DM determine which interface to use in
> low bandwidth situations?

It doesn't.

One way to solve the problem: you can do is to change the grouping
policy to by changing policy to be "group_by_prio", and having a
priority handler that would give a prio value proportional to the
bandwidth usage. But, note that this will keep moving the active path
(may be that is what you want).

> 
> Thanks,
> Scott
> 
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