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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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4 November 2022
Date | Time (UTC) | Event | Impact | User action |
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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 |
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 24 Oct | The first of five tape libraries shipped from Reading to Bologna was put in production on . This provides access to additional 4,000 tape cartridges, mostly operational data. | The type of data becoming available:
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w/c 31 Oct | The remaining four libraries undergoing final testing/configuration, will gradually be put in production Delays in the connectivity of the Reading tape libraries meant we could not put any in operation last week. Remaining five 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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