On 16 Apr 2009 at 13:19, Bart Van Assche wrote:

> On Thu, Apr 16, 2009 at 1:10 PM, Ulrich Windl
> <ulrich.wi...@rz.uni-regensburg.de> wrote:
> > Considering that most remote iSCSI targets have "intelligece" of their own, 
> > the
> > use of a no-op i/O scheduler seems justified. I think multiple I/O 
> > schedulers on
> > both ends don't necessarily make things faster, unless there is a bunch of
> > requests that can be compacted into one. Then throughput rises while 
> > response may
> > decline.
> Is request merging implemented in the SCSI layer or in the I/O scheduler ?

AFAIK, it's implemented in the I/O scheduler at least (depending on the actual 
type being used). I don't know about the SCSI layer.


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