NCSS Wiki

makeDRPcont

group: EventStream table: <database name> state: MakeDRPGif

makeDRPcont runs programs to generate the waveform image (snapshot) for the Duty Review Page for new events. If the event magnitude is 2.5 or larger, a synopsis waveform image is also generated. The resulting images are then copied using scp to a configured list of remote destinations such as the Duty Review Page web server.

makeDRPcont runs a modified PCS loop:

• queries for the next event in its assigned stream-state
• if an event is found and is less than 7 days old, fork off a child process to handle that event
• the parent program will not let more than 2 processes run; if necessary it waits for a child to finish before starting the next one. This is to minimize the load on wave servers for this task.
• the parent process set the stream-state event result to 1 immediately.
• the child process runs snapGif to generate the snapshot image.
• if the event magnitude is 2.5 or greater, the child process runs synopsgif to generate the synopsis image.
• the child process copies the resulting image files using scp to destinations listed in targetURL.cfg
• the child process runs cleanup on the local and remote image directories to delete files more than 7 days old.
• if no event is found, the parent program sleeps 30 seconds and repeats the loop

post-proc systems: /home/ncss/ncpp/drp/bin

/home/ncss/ncpp/drp/conf/properties_event
/home/ncss/ncpp/drp/conf/properties_synopsis
/home/ncss/ncpp/drp/conf/synopsis.list
/home/ncss/ncpp/drp/conf/targetURL.cfg

command line

1,11,21,31,41,51 * * * * /home/ncss/ncpp/drp/bin/startDRP dcucb

/home/ncss/ncpp/drp/logs/makeDRP.log

• /home/ncss/ncpp/bin/snapGif: runs that java class org.trinet.web.SnapGif to produce the snapshot image
• /home/ncss/ncpp/bin/synopsgif: runs the java class org.trinet.apps.SnapShotFromList to produce the synopsis image. /home/ncss/ncpp/drp/conf/synopsis.list lists the SNCLs to be included in the synopsis image.
• /home/ncss/ncpp/bin/cleanup: deletes files older than 7 days from the directory specified on its command line.
• /usr/bin/ssh, /usr/bin/scp: used for communication with remote machines