I am using the iozone tool for measuring the file system performance. but when I use the auto mode in iozone the read performance is very low in some cases(getting 32MB/s for record length > 128kb, for iGB file size) compared to throughput mode(70MB/sec irrespective of the record or file size). What is the reason for this difference.
Regards,
Pradeepkumar S
On 10/24/08, Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx> wrote:
Hi...
On Fri, Oct 24, 2008 at 9:41 PM, pradeepkumar soman
<pradeep2481@xxxxxxxxx> wrote:
>
> high means better performance.
> I am using the sequential reading
> How VFS takes decision on whether to turn on readahead?
I see.... fortunately newer readahead is invented by Fengguang Wu and
once I wrote about it with him.
Here's the URL:
http://www.samag.com/documents/sam0616a/
regards,
Mulyadi.
