Messages in this thread |  | | Subject | Re: [RFC] Multi-path IO in 2.5/2.6 ? | Date | Mon, 09 Sep 2002 09:57:56 -0500 | From | James Bottomley <> |
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Lars Marowsky-Bree <lmb@suse.de> said: > So, what is the take on "multi-path IO" (in particular, storage) in > 2.5/2.6?
I've already made my views on this fairly clear (at least from the SCSI stack standpoint):
- multi-path inside the low level drivers (like qla2x00) is wrong - multi-path inside the SCSI mid-layer is probably wrong - from the generic block layer on up, I hold no specific preferences
That being said, I'm not particularly happy to have the multi-path solution tied to a specific raid driver; I'd much rather it were in something generic that could be made use of by all raid drivers (and yes, I do see the LVM2 device mapper as more hopeful than md in this regard).
> I am looking at what to do for 2.5. I have considered porting the > small changes from 2.4 to md 2.5. The LVM1 changes are probably and > out gone, as LVM1 doesn't work still.
Well, neither of the people most involved in the development (that's Neil Brown for md in general and Ingo Molnar for the multi-path enhancements) made any comments---see if you can elicit some feedback from either of them.
James
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