Experimental Physics and
Industrial Control System

Devin Bougie <[email protected]> · Mon, 6 Aug 2007 15:58:49 -0400

Hi All,
We are running the 08/29/2006 snapshot of the Channel Archiver and
currently have the same system archiving and serving data. We've
started to notice that every-time the update_server cron job runs and
actually has something to update, signals viewed with the Java
Archive Viewer appear to stop changing for various amounts of time.
If we recreate the affected master_index (remove master_index and
indexconfig.xml files from /arch/data; execute /arch/scripts/
update_indices.pl) everything looks normal.
For example, this first screenshot of the archive viewer was taken
after the update_server cron job ran at 15:01. Note that normal
behavior seems to resume at different times between 15:02 and 15:09.

And the second snapshot of the same data was taken after rebuilding
the master_index.

Could this be the result of some problem in our setup or
configuration? Any suggestions for avoiding this would be greatly
apprecited.
Many thanks,
Devin
------
Devin Bougie
Laboratory for Elementary-Particle Physics
Cornell University
[email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System