Dear Collaborators,
Yesterday, RCF measured the performance of the data sinking. They
were capable of sinking about 40 GB/hour. The rates for the four
experiments were: PHENIX about 6MB/s, STAR, PHOBOS and BRAHMS about 2MB/s.
PHENIX and BRAHMS transferred data to the HPSS system using parallell
FTP (PFTP). BRAHMS' transfers were throttled at 2MB/s since we are a small
experiment (the original target rate during MDC1 was 1MB/s). STAR and
PHOBOS transferred data using FTP, no throttling.
PHENIX were close to filling their disk cache on the HPSS server. The
tape drives should be able to transfer 11-12MB/s and RCF people are
investigating why the drives managed only 6MB/s.
Today we'll start the reconstruction phase of MDC1.
Regards,
Alv Kjetil Holme
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