Timeline for the next few weeks

The timeline will be adjusted as events unfold, but this is the current plan:

week commencing 10 Feb

Big picture: prepare everything for next round of ATLAS recall tests.

w/c 17 Feb

w/c 24 Feb

w/c 2 Mar

w/c 9 Mar

w/c 16 Mar

 

Monitoring

Management Dashboard

These two dashboards are all that is needed. We probably want a way to display an up-to-date snapshot of the first graph on the webpage.

Actions

Operations/Developer Dashboards

Actions

 

Backpressure

Cédric presented the backpressure mechanism implemented in the tapeserver.

The discussion was cut short as we ran out of time. We will schedule a technical meeting to finish the discussion.

 

Unresolved problems

  • How to ensure that DAQ writes cannot be blocked by other writes or recalls filling the buffer.
  • We need to have a policy for what to do with zero-length files.
  • How to handle ALICE "probe" (copies a small file to a tape-backed directory, reads it back, deletes the file before it makes it to tape).