Re: All clients impatient

[Jens Axboe <axboe@kernel.dk>]

On 2012-11-14 14:30, emery@sgi.com wrote:
> emery@sgi.com:  Jens Axboe <axboe@kernel.dk>
> In message <50A405C4.50100@kernel.dk>, Jens Axboe writes:
>> On 2012-11-14 12:58, Jens Axboe wrote:
>>> Should work without group_reporting as well with the below patch. Can
>>> you confirm?
>>
>> Committed the patch, with a few modifications. So fio git should work
>> for you now, regardless of whether group_reporting=1 is used or not. I
>> suspect you want it on in any case, as you are only interested in the
>> aggregate results for the clients.
>>
>> -- 
>> Jens Axboe
>>
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> 
> 	I will probably run w/o group_reporting=1. I'm interested
> in both the aggregate performance of the cluster filesystem(s), and
> the deviation of the individual threads.
> 
> 	Aggregate performance helps me quickly see whether I'm getting
> the performance I expect from the filesystem or filesystems. W/o that
> feature I might have to whip out a calculator. :-)
> 
> 	Individual thread performance lets me know whether one or
> more tape drives would be bandwidth starved, which can lead to 
> excessive tape wear.

Ah I see, so you do care about individual thread numbers. Which is fine!
And at least everything should work now, regardless of whether
group_reporting is set or not.

-- 
Jens Axboe