Universal Logging System

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===== Preparations =====

Throughout the documentation, the term "stage environment" will be 
used to identify the staging or test or whatever environment 
is used for the tests.

Set up the stage environment as a new ULS-server, you do not need any data from the production environment.

Remove all defined limits, aggregations and value retentions. 
Login to the ULS-server as user "uls" and issue the command:

<code bash>
$ u2w_interpreter /home/uls/testsuite/del_all_limits.s2w
</code>

Check that the regular ULS jobs are correctly executed by cron:
<code bash>
$ cd /etc/cron.d/
$ vi ulsserver
</code>

Should look like:
<file bash ulsserver>
# delete old values
3 0 * * * uls /usr/local/bin/jobmonitor2uls -s ULS -t Delete-Old-Loggings /srv/uls/clean/mysql_delete_old_loggings >/dev/null 2>&1
#
# test limits
4-59/5 * * * * uls /usr/local/bin/jobmonitor2uls -s ULS -t Test-Limits /srv/uls/ulsmeld/do_ulsmeld test_isalive test_limits test_kombilimits >/dev/null 2>&1
#
# send mail reports
# 3 * * * * uls /usr/local/bin/jobmonitor2uls -s ULS -t Mailreports /srv/uls/jobs/send_mailreports >/dev/null 2>&1
#
# aggregation
1 5 * * * uls /usr/local/bin/jobmonitor2uls -s ULS -t Compression /srv/uls/jobs/komprimierung >/dev/null 2>&1
</file>

:!: The ULS-server always marks the last checked value to continue 
with the next execution of the test scripts.
So you need to reset these marks before starting the test scripts
(or wait until it is executed by cron):

<code bash>
$ /usr/local/uls/ulsmeld/do_ulsmeld -f test_limits
$ /usr/local/uls/ulsmeld/do_ulsmeld -f test_kombilimits
$ /usr/local/uls/ulsmeld/do_ulsmeld -f test_isalive
</code>

:!: That will perhaps run for a long time depending on the number of meanwhile unprocessed values :!:

Clear the log file for the notification messages:

<code bash>
$ echo > /tmp/ulsserver.meldungen.out
$ chmod 664 /tmp/ulsserver.meldungen.out
</code>

----

==== gnuplot colors ====

We made some research on what colors to use for the output of the graphs for which gnuplot is used.
Found [[http://phrogz.net/css/distinct-colors.html]] very useful to play around with colors.
But it took some time. Came back to these settings:

  * Hue: 0 to 360, step 30
  * Saturation: 100 to 30, step 70
  * Value: 100 to 100, no variation
  * Threshold set to generate 12 colors (the function of pre-shuffle is unclear)

But finally, we took these 16 colors:
  * TODO


<!-- define the gnuplot colors in /usr/local/uls/wwwbin/loggingout_grafik_prescript.plt  --> 

-----
Universal Logging System

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