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The average transfer rate from disk to tape was about 78MB/s. Only one tape drive at a time was allowed for writing.
Transfer 8TB of data (test 20091007)
Another test transferring about 8TiB of data was done. This time three out of the four HPSS tape drivers were allowed for writing. The 8TiB of data were spread over eight data servers and the migration to HPSS was running in parallel on all eight servers. Below are some stats for the transfers:
FGST servers used | 8 |
total number of files | 3664 |
total size | 8.06 TiB |
time of transfer | 13:50 h |
rate | ~169 MiB/s |
transfers failed | 0 |
While the transfers were running the network IO and (for some time) the disk IO on the two HPSS movers were recorded.
The HPSS instance has two disk arrays that are accessed by both movers and show up as devices sdc and sdd.