HP 3000 Manuals HP 3000 Manuals
Introduction to EXTRACT
The EXTRACT program is a key part of Performance Collection Software data
analysis and archiving procedures. The program creates an extracted file
that can be either kept on the host system as a remote file or
transferred to a PC for local analysis. It can be used in either an
interactive or a batch mode.
You can extract data without interrupting data collection. To ensure
that you do not inadvertently mix data from different systems, EXTRACT
stores all data types in the same extracted file.
EXTRACT lets you do the following:
* Extract data from raw log files to create an extracted log file.
* Extract data from previously extracted log files.
* Summarize extracted data.
* Export data from raw and extracted log files for use outside the
Performance Collection Software product.
Extracting Data
You can select a combination of data to be extracted, by types--global,
application, process, disc--and by starting and ending date and time.
Or, you can use one of several commands that automatically determine the
selection and summarization criteria for you.
Summarizing Data
You have several options for summarizing extracted data:
* You can summarize detailed raw data and hourly averages.
Extracted log files that contain hourly averages take less disc
space and can be accessed faster than those containing detailed
data. You do, however, lose the time granularity associated with
detailed data.
* You can extract detailed and summarized data into a single log
file.
Extracted log files that contain both types of data offer full
time granularity. You gain speed of access, but you do not save
disc space.
Appending Data to an Existing File
You can use EXTRACT to append data to the end of an existing extracted
log file, but you will be forced to continue the same data types,
subsetting, and summarization used in the initial extraction.
The ability to append data to an extracted log file is valuable for
archiving log files. You can use extracted log files for archiving
Performance Collection Software data in an easily accessible form or for
transporting data between systems. Tracking long-term trends requires
keeping data for years. See chapter 6 for recommendations on using
EXTRACT to archive data.
EXTRACT Commands
Major EXTRACT functions are described briefly below; for a detailed
explanation of each command, see chapter 5.
EXPORT Copies selected data from raw or extracted log
files into a format that can be recorded and
processed by other users.
EXTRACT Copies selected data from raw or extracted log
files into an extracted file format. Extracted
files can be processed using other LaserRX/MPE
programs on other HP 3000 or PC Analysis
workstations.
MONTHLY Performs an extraction based on a calendar
month. Start date, stop date, and output name
are set automatically.
SHIFT Sets daily shift information for an EXTRACT and
EXPORT function. It allows you to limit data
extraction to certain hours of the day and to
exclude weekends.
START Sets the starting date and time for an EXTRACT
and EXPORT function.
STOP Sets the stopping date and time for an EXTRACT
and EXPORT function.
WEEKLY Performs an extraction based on a calendar week
(defined as seven days starting on Monday and
ending on Sunday). Start and stop dates and
output name are set automatically.
YEARLY Performs an extraction based on a calendar year.
Start date, stop date, and output name are set
automatically.