To Create A Summary Log File - HP P4535A - Web Cache Server Appliance Administrator's Manual

Chapter 12
COUNT
SUM
AVERAGE
FIRST
LAST
You can apply each of these operators to specific fields, requesting it to operate over a specified interval.
Summary logs represent a trade-off between convenience and information granularity. Since you must specify
a time interval during which only a single record is generated, you will necessarily be losing a certain amount
of information. If you want the convenience of summary logs, but also need the detail of a conventional log
file, consider creating and enabling two custom log formats—one using aggregate operators and the other not.

To create a summary log file:

1. Telnet into the HP web cache appliance and select Shell Access as described in
Methods‚ on page
2. Open the
logs_xml.config
3. Define the format of the log file as follows:
<LogFormat>
<Name = "summary"/>
<Format = "%<operator(field)> : %<operator(field)>"/>
<Interval = "n"/>
</Format>
where:
is one of the five aggregate operators (COUNT, SUM, AVERAGE, FIRST, LAST). You can
operator
specify more than one operator in the format line.
is the logging field that you want to aggregate.
field
is the interval in seconds between summary log entries.
n
For more information, see
For example, the following format generates one entry every 10 seconds, with each entry summarizing the
timestamp of the last entry of the interval, a count of the number of entries seen within that 10-second
interval, and the sum of all bytes sent to the client.
<LogFormat>
<Name = "summary"/>
<Format = "%<LAST(cqts)> : %<COUNT(*)> : %<SUM(psql)>"/>
<Interval = "10"/>
</Format>
IMPORTANT
4. Define a
LogObject
5. Save and close the configuration file.
6. Run the command
7.
file located in the Traffic Server's
logs_xml.config‚ on page
You cannot create a format specification that contains both aggregate operators and
regular fields. For example, the following specification would be invalid:
<Format = "%<LAST(cqts)> : %<COUNT(*)> : %<SUM(psql)> :
%<cqu>"/>
that uses this format.
to apply the configuration changes.
traffic_line -x
config directory
171.
Working with Log Files
Overview of Access
with Vi.
107