Re: load-gen from an osd node

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On Wed, Jul 8, 2015 at 5:17 PM, Deneau, Tom <tom.deneau@xxxxxxx> wrote:
> With the newer rados, just running  rados -p somepool load-gen, we get
>
> preparing 200 objects
> load-gen will run 60 seconds
>     1: throughput=0MB/sec pending data=0
>     2: throughput=0MB/sec pending data=0
>     3: throughput=0MB/sec pending data=0
>     4: throughput=0MB/sec pending data=0
>     5: throughput=0MB/sec pending data=0
>     6: throughput=0MB/sec pending data=0
>
> But I see the change that caused this behavior was explicitly initializing lg.max_ops to 0.
> Before this, max_ops was just whatever happened to be in memory.
>
> So the newer load-gen works fine as long as you explicitly set --max-ops on the command line.

Can you create a ticket on the tracker describing this issue? That's
the kind of thing we'll want to fix. ;)
-Greg

>
> -- Tom Deneau
>
>
>> -----Original Message-----
>> From: Gregory Farnum [mailto:greg@xxxxxxxxxxx]
>> Sent: Wednesday, July 01, 2015 11:05 AM
>> To: Deneau, Tom
>> Cc: ceph-devel
>> Subject: Re: load-gen from an osd node
>>
>> Hmm, the only changes I see between those two versions are some pretty
>> precise cleanups which shouldn't cause this. But it means that a bisect or
>> determined look should be easy. Can you create a ticket which includes the
>> exact output you're seeing and the exact versions you're running?
>> -Greg
>>
>> On Mon, Jun 29, 2015 at 11:27 PM, Deneau, Tom <tom.deneau@xxxxxxx> wrote:
>> > Oh, I just noticed that the client nodes I spoke of where load-gen
>> > actually worked were running 0.94, not 9.0.1.  And when I upgrade them to
>> 9.0.1, load-gen no longer works.
>> >
>> > So more likely this is just a problem with newer rados load-gens
>> >
>> > -- Tom
>> >
>> >
>> >
>> >> -----Original Message-----
>> >> From: Deneau, Tom
>> >> Sent: Friday, June 26, 2015 7:48 PM
>> >> To: ceph-devel
>> >> Subject: load-gen from an osd node
>> >>
>> >> I am running 9.0.1 and I noticed when I run rados load-gen from one
>> >> of the osd nodes, it creates the objects but then always reports a
>> >> throughput of 0 MB/sec.
>> >>
>> >> But if I run it from a separate client node, it works fine.
>> >> Why would this be?
>> >>
>> >> I'm not sure but I thought in earlier versions load-gen could be run
>> >> from an osd node.
>> >>
>> >> -- Tom Deneau
>> > --
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