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DateTime (UTC)Event ImpactUser 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 - 10:30Drain 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:

  • 6,500 tapes from Reading loaded into existing Bologna libraries
  • 1.2 PiB disk cache of popular data 
Short interruptions

The type of data becoming available:

  • all S2S dataset
  • popular data from Reading disks on marsod (operational data, class=od)

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:

  • totalling 16,500 Reading tapes made available (out of 21,900)

Additional 1.5 PiB disk cache of popular data

Short interruptions

The type of data becoming available:

  • popular data from Reading disks on marser (eg, ERA5, CAMS, ...).
  • 75% of the Archives from tape should become 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:

  • 50% of the Archives from tape is available


w/c 31 Oct

Three additional tape libraries were put in production this week.


System sessions on tape libraries required

The type of data becoming available:

  • More than 85% of the Archives from tape is available:
    • MARS: 283 out of 339 PiB of data available
    • ECFS: all 125 PiB, 100% available
  • Most operational data and e-suite data (class=od) available (except few tapes containing enfo/pf and oper/fc)

Users are encouraged to resume their work, noting that some RD, Re-Analysis and TIGGE data may still be unavailable.

w/c 7 Nov
One tape library left to complete the DHS MoveSystem sessions on tape libraries requiredCheck service status

w/c 7 Nov

date t.b.a.

 


End of DHS Move (depending on all above) Access to full MARS/ECFSCheck service status

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