The CDS Data Acquisition System lookback times have recently been extended when we upgraded to the new Linux file systems with their 150TB RAIDs.

Both h1daqnds0 and h1daqnds1 are now running at nominal disk usage, with a wiper script maintaining the required amount of free disk space.

The lookback times for h1daqnds0 and h1daqnds1 can be obtained by running the lookback command. Note that control room users can ignore the minute_trend line, this refers to GWF framed minute_trends which are only used by LDAS for archival. CDS minute trends have no limits on their lookbacks (trends go back to the channel's creation date).

The wiper is currently configured to maintain 84 days (3 months) of second_trends, 28 days of minute_trends, and the rest is given to full framed data (currently about 2 months worth)

Each line shows the lookback time in days and the oldest file's GPS time along with its corresponding local time.

david.barker@opslogin0: lookback 
DAQ0
2023-05-03 08:10 PDT
        full 57d 1362168064 [2023-03-06 12:00 PST]
second_trend 84d 1359850200 [2023-02-07 16:09 PST]
minute_trend 28d 1364691600 [2023-04-04 17:59 PDT]
 
DAQ1
2023-05-03 08:13 PDT
        full 57d 1362174848 [2023-03-06 13:53 PST]
second_trend 84d 1359850200 [2023-02-07 16:09 PST]
minute_trend 28d 1364691600 [2023-04-04 17:59 PDT]