[dm-devel] How dm multipath handle IO

Nicolas Michel be.nicolas.michel at gmail.com
Fri Mar 14 08:44:03 UTC 2014


Hello Guys,

It's a general question about how dm and particularly multipathd handle IO?
I mean, is it a transaction? Is each IO initiated from the OS get back an
acknowledgement? If it is, is there a retry mechanism?
Or are the IO sent blindingly to the block device?

If someone have some good article on it, I would be very interested in
understanding more deeply how IO are handled.

Thanks a lot,

-- 
Nicolas MICHEL
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