On Tuesday, January 08, 2013 10:53:44 AM Peter Lieven wrote: > Am 08.01.2013 um 09:50 schrieb Vadim Rozenfeld <vroze...@redhat.com>: > > On Tuesday, January 08, 2013 10:16:48 AM Peter Lieven wrote: > >> Hi all, > >> > >> I came across the fact that Windows seems to requests greater 64KB into > >> pieces leading to a lot of IOPs on the storage side. > >> > >> Can anyone imagine of a way to merge them before sending them to e.g. an > >> iSCSI Storage? 64KB I/O Size is not optimal when e.g. large sequential > >> operations with an iSCSI target. > >> > >> Thank you, > >> Peter > > > > Hi Peter. > > Is it viostor? Which version? The most recent one is able to handle 256K > > blocks. > > Not the recent. I will try 0.1.49 now. > > 256KB is still not that much but definitely better than 64KB. are this > windows limits?
not exactly. it came from the driver itself. actually, with indirect buffer support in virtio the sky is the limit. > > I have found docs in the net that windows splits up everything into 64kB > requests. Is this info old? > > thank you, > Peter > > > Best regards, > > Vadim.