Slow Controls Time History

Produces Web-based timeline plots, can be viewed on http://clasweb.jlab.org/cgi-bin/epics_history/epics.pl.

Resides in CVSROOT=/home/epics/cvs, normally checked out to /home/epics/history and running on clon01 as user epics.

Main script is:

 get_latest_cont.pl

It reads EPICS channels and updates epics database on clondb1.

Cron job is checking if main script is running (if not it will try to restart it):

 0,15,30,45 * * * * (/bin/tcsh -c  /home/epics/history/www/check_get.pl >> /dev/null)

If started by cron job, log file /home/epics/history/log/get_latest_cont.log will be produced (CURRENTLY GOES TO /dev/null !!!)

Database epics on clondb1 was creates as follwoing:

 mysql> create database epics;
 mysql> grant ALL on epics.* to marki@clon01.jlab.org identified by '********';
 mysql> grant ALL on epics2.* to marki@clon01.jlab.org identified by '********';
 mysql> grant SELECT,INSERT,UPDATE on epics.* to epics@clon01.jlab.org;
 mysql> grant SELECT,INSERT,UPDATE on epics2.* to epics@clon01.jlab.org;
 mysql> grant SELECT on epics.* to clasweb@claspc28.jlab.org;
 mysql> grant SELECT on epics2.* to clasweb@claspc28.jlab.org;

Web software runs on clasweb machine. It can be found in /u/group/clas/www/clasweb/htbin/epics_history' directory, in particular file 'db_parms.pm' contains the name of database machine (in our case clondb1) and other related attributes.

IMPORTANT: DUMPING FROM clasweb-bck:

 cd /home
 mysqldump -uroot -pe1tocome epics | gzip > /home/epics.sql.gz
   mysqldump: Can't get CREATE TABLE for table `hallb_sf_xy560_0_12_1min` (Can't open file: 'hallb_sf_xy560_0_12_1min.MYI'. (errno: 145))
 one table:
   mysqldump -uroot -pe1tocome epics hallb_sf_xy560_0_12_1hr > 1hr.sql
     (works)
   mysqldump -uroot -pe1tocome epics hallb_sf_xy560_0_12_1min > 1min.sql
     mysqldump: Can't get CREATE TABLE for table `hallb_sf_xy560_0_12_1min` (Can't open file: 'hallb_sf_xy560_0_12_1min.MYI'. (errno: 145))

Following command produce error message but runs (took about 33 minutes):

 mysqldump -f -l --opt -uroot -pe1tocome epics | gzip > /home/epics.sql.gz
   mysqldump: Got error: 1016: Can't open file: 'hallb_sf_xy560_0_12_1min.MYI'. (errno: 145) when using LOCK TABLES
   mysqldump: Can't get CREATE TABLE for table `hallb_sf_xy560_0_12_1min` (Can't open file: 'hallb_sf_xy560_0_12_1min.MYI'. (errno: 145))
   mysqldump: Can't get CREATE TABLE for table `hallc_MeV_1min` (Can't open file: 'hallc_MeV_1min.MYI'. (errno: 145))
   mysqldump: Can't get CREATE TABLE for table `ioctorus1colonloadPercent_1min` (Can't open file: 'ioctorus1colonloadPercent_1min.MYI'. (errno: 145))

Import into clondb1: type following on clondb1:

 cd /database
 scp clasweb-bck:/home/epics.sql.gz .
 gunzip epics.sql.gz
 mysql -u root -p epics < epics.sql

(last command took about 19 minutes).

TODO:

 understand errors reported by 'mysqldump'; fix database if necessary

 when script 'get_latest_cont.pl' was started it produced the number of errors into log file
 '/home/epics/history/log/get_latest_cont.log1'; currently script is writing to /dev/null
 so log file can be used to see what was wrong