[GE users] IO and IOW accounting

Sean Davis sdavis2 at mail.nih.gov
Fri Oct 3 21:24:37 BST 2008


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On Fri, Oct 3, 2008 at 4:09 PM, Rayson Ho <rayrayson at gmail.com> wrote:
> On 10/3/08, Daniel Templeton <Dan.Templeton at sun.com> wrote:
>> I stand corrected according to 2429 as pointed out by Rayson.  According to
>> the issue synopsis, the Linux kernel can now be compiled to track simple
>> per-process I/O.  Issue 2429 will make SGE able to use the feature.
>
> Actually, newer Linux kernel releases have that feature on by default.
>
> IMO, it good to add this IO accounting code into SGE, as the impact to
> PDC is extremely small.

And for very IO intensive operations (like what we run 90% of the
time), it could prove important to reducing cluster-wide IO wait and
bandwidth issues.

Sean

>>
>> Daniel
>>
>>
>> Daniel Templeton wrote:
>> > Most OSes don't provide the ability to track I/O on a per-process basis,
>> so on most OSes SGE will always report the I/Os as 0.  I believe Irix is one
>> of the exceptions.  I know that Linux and Solaris are not.
>> >
>> > Daniel
>> >
>> > Sean Davis wrote:
>> >
>> > > I would like to be able to track IO and IOW via qacct.  As it stands,
>> > > all IO and IOW are 0.000.  How can I go about doing so?
>> > >
>> > > Thanks,
>> > > Sean
>> > >
>> > >
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