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Obviously some of the dates below are tentative. We will update users as and when we have more certainty about progress.
Timetable of System Session on 8 September -
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21 October 2022
| Date | Time (UTC) | Event | Impact | User action |
|---|---|---|---|---|
8 Sep | 09:30 | Start of DHS Move Change configuration of all services using MARS/ECFS to point to the temporary DHS in Bologna. | Check service status | |
| 09:30 - 10:30 | Drain all MARS/ECFS activity in DHS infrastructure in Reading | All active/queued MARS retrieve requests and ECFS get operations on the DHS in Reading will fail. | Please re-run to test behaviour expected during DHS Move. | |
w/c 12 Sep | MARS/ECFS/HPSS metadata transfer to Bologna. Start DHS infrastructure in Bologna (DHS-Blank) | Short interruption. Stop writing new data into temporary-DHS and start archive/store to production MARS/ECFS in Bologna. | Check service status | |
| from 14 Sep | Physical relocation starts: tapes, tape libraries, disks, servers start being shipped to Bologna | |||
| w/c 3 Oct | First data started appearing in Bologna:
| Short interruptions | The type of data becoming available:
Try resuming work for the above. Failures may occur as not all streams/types/levtypes are available. | |
| w/c 10 Oct | Three Reading tape libraries (out of 5) re-assembled in Bologna put in production:
Additional 1.5 PiB disk cache of popular data | Short interruptions | The type of data becoming available:
Try resuming work for the above. Failures may occur as not all class/streams/types/levtypes are available. | |
| w/c 17 Oct | Remaining two Reading tape libraries re-assembled in Bologna put in production: End of DHS Move (depending on all above) | Access to full MARS/ECFS | Check service status |
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