RE: Summary of the Multi-Path BOF at OLS and future directions

jansen, frank
2003-08-08T12:28:34Z

> Josef Möllers wrote
>
> With MultiPath it _is_ necessary to TRESPASS a CLARiiON box if each SP
> is conected to a seperate path.
>
To access the non-active path, this is correct. What I was trying to say
is that the MultiPath layer should be somewhat intelligent about this and
be aware that there may be another active path. It is much quicker to go
down an active path than trespass a LUN and then do the I/O. The other
part is the risk of excessive trespassing, where a LUN just gets bounced
back and forth between SPs for each I/O; this is an absolute worst case
that would bring performance to a standstill.
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