On 11/29/2014 09:01 PM, Patrick wrote:
> Hi,
>
> Last night I started two jobs, one with data spooling and the other without
> data spooling. Both jobs used the same pool and only one tape drive was
> available.
>
> What I have seen from the logs:
> Both jobs started. The without data spooling job mounted the tape drive with
> a volume from the desired pool and write files to it. The data spooling job
> also started, use the same tape drive with the same volume and write files
> into the spooling area. The data spooling finished spooling and write the
> data to the volume, the without data spooling job still runs and write data
> to the same volume.
>
> My Question:
> If I ran two jobs, one with data spooling the other without data spooling, at
> the same time with the same pool and only one tape drive, the data will be
> mixed on the volume?
That depends. If the job not spooling finishes before the spooling job
despools there will be no mixing. In any case data will not be
interleaved while a job is despooling, because it locks all other
threads during the despooling.
> And a possible restore will take a long long time?
The restore might possibly take a little longer if the data is heavily
interleaved, but if it is a modern tape drive, skipping data from
another job should be very fast, and you probably won't see the difference.
Best regards,
Kern
>
> Thanks,
> Patrick
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