Tuesday, 8 February 2011

UK cloud offline - LFC intervention

Tomorrow (Weds 9th Feb.) the UK cloud will be offline for LFC intervention. Without the LFC your jobs don't know where files are stored and you can't register any new data.

This evening (Tues. 8th Feb.) the UK cloud will be set to offline. This will mean that jobs that are already queued will still run but nothing new will be assigned. In general 95%+ of jobs will be drained out of the system in the 12-15 hours before the downtime. At 10:30 UK time the LFC will then be taken down and won't be available again until around 4pm UK time, (assuming things go well). Any jobs that are still running when the LFC goes down will fail as the data won't be registered on the grid. The UK cloud can be considered completely unavailable during this time. Once the LFC is back you will be able to dq2-get your files again. The cloud will be set back online shortly afterwards and job submission will start again. Note some Tier 2 sites will take advantage of the downtime to make upgrades of their own so if you have data at a specific Tier 2 you might want to check it doesn't have a separate downtime.