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Top Forums UNIX for Dummies Questions & Answers Script to search log file for last 15 mins data Post 302956794 by methyl on Saturday 3rd of October 2015 08:09:52 PM
Old 10-03-2015
Quote:
I strongly suggest that instead of trying to match based on timestamps you instead keep track of the line number of the last line processed in the previous run and on the next run just start processing with the next line in that log file. Doing it this way will keep you from missing events and keep you from processing some events twice.
Furthur to Don_Cragun, and if I have understood the task correctly.

You need a script running under cron every 15 minutes which copies the current logfile and compares the line count with the previous version of the logfile. The script then processes the "tail -#" number of lines difference.

This is a basic technique to avoid "tail -f" on logfiles which will get deleted by log rotation scripts. It also avoids reading the logfile and processing all the timestamps in the logfile.

Don't forget the "first time" condition when the T-15 minutes copy does not exist. Your first run of the cron will just prepare the files.
 

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scds_syslog_debug(3HA)					 Sun Cluster HA and Data Services				    scds_syslog_debug(3HA)

NAME
scds_syslog_debug - write a debugging message to the system log SYNOPSIS
cc [flags...] -I /usr/cluster/include file -L /usr/cluster/lib -l dsdev #include <rgm/libdsdev.h> void scds_syslog_debug(int debug_level, constchar *format... DESCRIPTION
The scds_syslog_debug() function writes a debugging message to the system log. It uses the facility returned by the scha_cluster_getlogfa- cility(3HA) function. All syslog messages are prefixed with: SC[<resourceTypeName>,<resourceGroupName>,<resourceName>,<methodName> If you specify a debug_level greater than the current debugging level being used, no information is written. The DSDL defines the maximum debugging level, SCDS_MAX_DEBUG_LEVEL, as 9. The scds_initialize(3HA) function, which the calling program must call before scds_syslog_debug(), retrieves the current debugging level from the file: /var/cluster/rgm/rt/<resourceTypeName>/loglevel. Caution - Messages written to the system log are not internationalized. Do not use gettext() or other message translation functions in conjunction with this function. PARAMETERS
The following parameters are supported: debug_level Debugging level at which this message is to be written. Valid debugging levels are between 1 and SCDS_MAX_DEBUG_LEVEL, which is defined as 9 by the DSDL. If the specified debugging level is greater than the debugging level set by the calling program, the message is not written to the system log. format Message format string, as specified by printf(3C) ... Variables, indicated by the format parameter, as specified by printf(3C) EXAMPLES
Example 1 Display All Debugging Messages To see all debugging messages for resource type SUNW.iws, issue the following command on all nodes of your cluster echo 9 > /var/cluster/rgm/rt/SUNW.iws/loglevel Example 2 Suppress Debugging Messages To suppress debugging messages for resource type SUNW.iws, issue the following command on all nodes of your cluster echo 0 > /var/cluster/rgm/rt/SUNW.iws/loglevel FILES
/usr/cluster/include/rgm/libdsdev.h Include file /usr/cluster/lib/libdsdev.so Library ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscdev | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
printf(3C), scds_syslog(3HA), scha_cluster_getlogfacility(3HA), syslog(3C), syslog.conf(4), attributes(5) Sun Cluster 3.2 7 Sep 2007 scds_syslog_debug(3HA)
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