Australia Telescope Compact Array

Monitor Point Archiving

The Antenna Control Computers (ACCs) monitor approximately a thousand different Monitor Points which are transmitted back to the control building, and logged in the area AT$DATA (on one of the NOEL disks). This uses approximately 25MBytes (50 000 blocks) of diskspace each day.

The files are named AT$DATA:YYMMDD.MP*

In the current regime, data is archived and deleted each Wednesday. The past week's data is archived and the previous week's data deleted. (Thus, by the Wednesday, there will usually be 2 weeks worth of Monitor Point Data on the disk.)

Steps:

If possible, Wait 'till the start of the next UT day.
Ensure that all files have been properly closed. (If NOEL is shut down, files are not (always) properly closed)
- $ dir/siz=all at$data:9*
- If the two sizes are not cloce to the same (within 5 blocks), set the end of file marker to the end of the file with:
  $ set file/end_of_file _filename_
In AT$DATA: execute the archive procedure:
$ @mparchive
(The default answers should be ok)
Clean up the disk by executing the procedure del.com that is generated by the archive procedure.

If you do run out of disk space on $1$dka100: delete the oldest file(s) which should have been archived in the previous week.

Original: Robin Wark (20-Dec-1995)
Modified: Robin Wark (20-Dec-1995)