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Chapter 2: Control Data Collection › Use the Database Directory › Use the Daily Data Files (CPD)

Use the Daily Data Files (CPD)

The daily data files from the primary Performance Agent are used by other modules of the CA product set. The Performance Agent analyzes the data and creates report and graphs.

The data collection processes create a data file each day for each node in the cluster. The file name contains the origin and date of the data. It has the following format:

path:PSDC$nodename_yyyymmmdd.c-d-n
path

This is the directory specified in the collection definition.

nodename

This is the node name.

yyyymmmdd

This is the date in 4-digit year 3-letter month 2-digit day format.

c-d-n

This is the name of the collection definition.

Example file name:

PSDC$DATABASE:PSDC$GALLO_2008OCT26.CPD;1

The primary (CPD) data file contains one data record for each interval. The interval is two minutes. Each interval record contains subrecords for each major area of performance data. The following table shows the subrecords in the file:

Subrecord

Function

Record Count

Time Stamp

Contains a time stamp for the interval.

1

Metrics

Contains system-wide performance metrics.

1

Parameters

Contains values of some SYSGEN parameters.

1

Process

Contains data for processes and the images that were activated by the processes. Information pertaining to working set sizes, fault rates, UAF parameters, and so forth are contained in this subrecord.

1 record per image executed and 1 record per process terminated

Disk

Contains information about disk activities.

1 per disk device

Tape

Contains information about tape activities.

1 per tape device

Configuration

Contains the node names that are currently part of the cluster membership and/or local node and the SCS statistics for each member.

1 per SCS virtual circuit

CPU

Contains information about the percent of time spent in processor modes.

1 per CPU

Communication

Contains the operation counts for all terminal controllers.

1 per terminal controller

Hot files

Contains hot file activity.

0 to 40 per disk

For more information on Interval Sub record contents, see the chapter Dump Reports.