[Swift-devel] Reducing swift log size

[Yadu Nand Babuji]

Hi Mihael,

I've got the logs for you.

This time, i've run the 6001 tasks with 20s delay added, and was all run 
with swift-0.95-RC6 (from our website) :

Normal run                 -> 
http://users.rcc.uchicago.edu/~yadunand/run010_swift_normal/run010.log ( 
6.1gb )
With minimal logging -> 
http://users.rcc.uchicago.edu/~yadunand/run011_minimal_logging/run011.log ( 
7.5 gb )
With minimal logging -> 
http://users.rcc.uchicago.edu/~yadunand/run012_minimal_plus_log4j/run012.log 
( 845.4 kb )
& log4j properties modified

The run with minimal logging ran for ~15mins while the first run took 
~12mins. That *might* explain why the one
with minimal logging is larger.

Thanks,
Yadu

On 06/11/2014 02:54 PM, Mihael Hategan wrote:
> On Wed, 2014-06-11 at 14:46 -0500, Yadu Nand Babuji wrote:
>> Hi,
>>
>> I'm running a proxy app for a user with 6000 tasks each taking a few
>> milliseconds, and the log sizes are unusually large. When the tasks are
>> set to take 20s, the total log size reaches ~7Gb.
> 7GB? Wow. I'd like to see that. Can you upload and post link?
>
>> I tried setting -minimal.logging and -reduced.logging but still see
>> debug lines in the log like:
>> 2014-06-11 19:15:06,961+0000 DEBUG Cpu worker started:
>> block=0611-1507050-000000 host=midway461 id=10
>> 2014-06-11 19:15:06,961+0000 DEBUG Cpu ready for work:
>> block=0611-1507050-000000 id=10
>>
>> Do we need DEBUG lines such as the ones listed above ? Is it reasonable
>> to have these set by default to WARN ?
> It is until there's a problem and then people ask for the opposite. We
> should evaluate whether this belongs in reduced logging or not. But does
> that really account for most of the 7G?
>
>> Secondly, setting -minimal.logging did not turn off these DEBUG lines
>> and I had to set the following log4j.properties from DEBUG to WARN to
>> remove most of the offending lines:
> That sounds like a bug.
>
>> log4j.logger.org.globus.cog.abstraction.coaster.service.job.manager.Cpu=WARN
>> log4j.logger.org.globus.cog.abstraction.coaster.service.job.manager.Block=WARN
>>
>> With 6001 tasks, each taking 2 ms or so:
>> Swift without any changes to logging ->  440879 lines and  51Mb
>> Swift with -minimal.logging                ->    83350  lines and 9.5Mb
>> Swift with -minimal.logging and         ->      7625  lines and 791Kb
>> Cpu, Block log4j properties set
>>
>> Thanks,
>> Yadu
>> _______________________________________________
>> Swift-devel mailing list
>> Swift-devel at ci.uchicago.edu
>> https://lists.ci.uchicago.edu/cgi-bin/mailman/listinfo/swift-devel
>