Re: [dm-devel] performance considerations with IO schedulers and DM multipathing

["Stefan Bader" <sbader3 googlemail com>]

Hi Paul,

the device-mapper target itself doe not use any queue and so there is no scheduler used at all. Only the real devices that are used as paths will be using a scheduler. Whether there might be a performance gain by changing these, I do not know.

Stefan

2007/11/27, Paul Cote <paul cote incipient com>:

Hi,

 

Is there any advantage to one specific IO scheduler (below) that may improve IO performance / throughput when running with a round-robin failover policy? Has anyone done testing with this ... and willing to share results?

 

thanks,

Paul

 

Completely Fair Queuing—elevator=cfq (default)

Deadline—elevator=deadline

NOOP—elevator=noop

Anticipatory—elevator=as

 

--
dm-devel mailing list
dm-devel redhat com
https://www.redhat.com/mailman/listinfo/dm-devel