Re: [Nbd] NBD Super Size io operations
On Mon, Apr 1, 2013 at 4:25 PM, Michal Belczyk <belczyk@...1274...> wrote:
> This looks like my _other_ patch I mentioned last time (*), except that the
> suggested default value is different, doesn't it?
Yes, it's the same thing...I'm actually leaning toward the default
that you suggested (128KB). I'm testing now...
> (*) http://www.mail-archive.com/nbd-general@lists.sourceforge.net/msg01314.html
>
> On Mon, Apr 01, 2013 at 02:41:43PM -0400, Paul Clements wrote:
>> I'm looking at this right now. I just need to test and decide what the
>> default should be, and I'll send this upstream.
>>
>> Thanks,
>> Paul
>>
>> On Mon, Apr 1, 2013 at 1:45 PM, Rohan Sharma <rickyrohan14@...58...> wrote:
>> > My last message didn?t show up properly due to some formatting errors.
>> > So, I am sending it again
>> >
>> > I am using nbd over high latency network (100 ms ).
>> > Currently maximum size of nbd io operation(amount of data fetched in one
>> > request)
>> > I can achieve is 130kb and it gives very poor disk performance.
>> > I tried recompiling nbd driver code so as to increase max_sector_kb property
>> > of disk queue.
>> > I added following two lines to nbd_init function
>> > blk_queue_max_hw_sectors(disk->queue, 65536);
>> > disk->queue->limits.max_sectors = 4096;
>> > But these modifications changed nothing.
>> > Do you have any idea what can I do to increase size of nbd io operations?
>> > I would like it to go as high as 4MB.
>> >
>> > Thanks
>> >
>> >
>> >
>> >
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> --
> Michal Belczyk Sr.
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