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Re: [Qemu-devel] Windows and I/O size
From: |
Peter Lieven |
Subject: |
Re: [Qemu-devel] Windows and I/O size |
Date: |
Tue, 8 Jan 2013 09:53:44 +0100 |
Am 08.01.2013 um 09:50 schrieb Vadim Rozenfeld <address@hidden>:
> 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?
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.