Re: [PATCH] readahead:add blk_run_backing_dev

KOSAKI Motohiro
2009-06-01T03:06:41Z

> > >> >I mean, you should get >300MB/s throughput with 7 disks, and you
> > >> >should seek ways to achieve that before testing out this patch :-)
> > >>
> > >> Throughput number of storage array is very from one product to another.
> > >> On my hardware environment I think this number is valid and
> > >> my patch is effective.
> > >
> > >What's your readahead size? Is it large enough to cover the stripe width?
> >
> > Do you mean strage's readahead size?
>
> What's strage? I mean if your RAID's block device file is /dev/sda, then

I guess it's typo :-)
but I recommend he use sane test environment...

>
> blockdev --getra /dev/sda
>
> will tell its readahead size in unit of 512 bytes.
>
> Thanks,
> Fengguang