david.barker@LIGO.ORG - posted 13:14, Wednesday 25 July 2018 - last comment - 14:16, Wednesday 25 July 2018(43069)
DAQ h1nds1 restarted as part of h1tw1 raw minute trend data offloading process
WP7725 Offload raw minute trend files from h1tw1's almost full SSD-RAID
Dave:
The first step in the offload process is to start writing the most recent data to a new directory, freeing up the old directory for file transfer and verification.
Since this process takes about 3 days, the NDS processes need to be reconfigured to use the temporary location of the past 6 months of data so minute trends can continue to be used.
At 13:06 PDT I restarted h1nds1 (the default NDS for the control room), minute trends back to 09 March 2018 are available from their temporary location.
Open dataviewer sessions will need to be reconnected to the NDS.
starting the file transfer, a process on h1fw1 is copying from h1tw1 to h1ldasgw1 using 'ionice -c 3' which should only be granted disk access when the system is idle.