[gpfsug-discuss] mmbackup - Two at a time?

[Craig Wilson]

That is interesting...

The only time I've seen two starting is when someone manually cleared the
environment lock. That said I've never tried running from a different node
at the same time. I presume they would be duplicating effort based on the
node name being used in the shadow database file name.

Kind regards,

Craig Wilson.

On 27 May 2016 at 11:49, Simon Thompson (Research Computing - IT Services) <
S.J.Thompson at bham.ac.uk> wrote:

> Now we've seen different to this... But maybe it depends how you run
> mmbackup multiple times.
>
> We have several nodes which are backing up via Spectrum Protect, and we
> thought it would be nice to have the client scheduler running on multiple
> nodes, we assumed it would only actually run one instance of the backup.
> Not so. We've seen two client schedulers kick off mmbackup (each then I
> think running across several nodes).
>
> Simon
>
> From: <gpfsug-discuss-bounces at spectrumscale.org> on behalf of Craig
> Wilson <craigawilson at gmail.com>
> Reply-To: "gpfsug-discuss at spectrumscale.org" <
> gpfsug-discuss at spectrumscale.org>
> Date: Friday, 27 May 2016 at 11:32
> To: "gpfsug-discuss at spectrumscale.org" <gpfsug-discuss at spectrumscale.org>
> Subject: Re: [gpfsug-discuss] mmbackup - Two at a time?
>
> Hi Scott
>
> I've not tried this one 4.# branch as I'm still running 3.5 but on 3.5 you
> get a error message saying:
>
> mmbackup: Failed to obtain the local environment update lock.
> mmbackup: Command failed.  Examine previous error messages to determine
> cause.
>
> The old mmbackup keeps running through.
>
> Kind Regards,
>
> Craig Wilson.
> HPC Systems Engineer
> OCF Plc.
>
> On 26 May 2016 at 16:57, Scott Cumbie <scottcumbie at dynamixgroup.com>
> wrote:
>
>> Just wondering if anyone has a quick answer to this question.  If
>> mmbackup is running on a filesystem and a second mmbackup is executed on
>> the same filesystem, what happens?  Does the second one end because the
>> first one is running?
>>
>> Thanks,
>> Scott
>>
>>
>>
>>
>>
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>
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