Star-tpc-l mailing list

["Van Buren, Gene" <gene AT bnl.gov>]

The DataCarousel is healthy again, and space appears to have been cleaned on 
data27, so the exclusion has been removed (back to normal service).

-Gene

> On Jul 25, 2024, at 1:52 PM, Van Buren, Gene <gene AT bnl.gov> wrote:
> 
> A follow-up on this that I learned about after the TPC meeting...
> 
>> On Jul 25, 2024, at 12:54 PM, Richard Witt <Star-tpc-l AT lists.bnl.gov> 
>> wrote:
>> 
>>      — Production with TFG24c
>>              — some delays due to farm capacity and killed jobs (~1-2 week 
>> delay)
> 
> I understand the DAQ files are being staged on /star/data27 via the 
> DataCarousel. But that disk has been full for several days, so DataCarousel 
> attempts to restore files are failing repeatedly. As Jerome explained to 
> me, "this delays all requests pending and as a result, a cascading effect 
> occurs (pending requests may be files in cache that are purged ... then, 
> when they get to their restore time, the algorithm optimization is 
> destroyed because the restore pulls directly from tape not cache)."
> 
> To mitigate the impact on others, these requests that can't deliver their 
> files are going to be excluded from the DataCarousel queue for now until we 
> understand that the restores can move through successfully.
> 
> -Gene