[CentOS] Finding i/o bottleneck

On Mon, Sep 26, 2011 at 11:15 AM, Nicolas Ross
<rossnick-lists at cybercat.ca> wrote:
>>> In the meen time, I'd still like to find a tool to know what files are
>>> requeted to the filesystem and what ones are being waited for...
>>>
>>
>> atop and iotop are tools that do that...when the kernel has been
>> appropriately patched or the kernel is of an appropriate version...
>
> I did used these utilities, while it can help see what processes are
> generating IO, it doesn't show what files on the file system are being asked
> or waited for.
>
> Basicly, what I'm searching is an equivalent for fs_usage on Mac OS X, or
> tcpdump, but on a bloc device...

Not sure what those do, but lsof should show what files are open, and
'strace -p process_id' would show the system calls issued by a
process.

-- 
  Les Mikesell
    lesmikesell at gmail.com