|
HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|
|
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CAVEATS | PCP ENVIRONMENT | SEE ALSO | COLOPHON |
|
|
|
IOSTAT2PCP(1) General Commands Manual IOSTAT2PCP(1)
iostat2pcp - import iostat data and create a PCP archive
iostat2pcp [-v] [-S start] [-t interval] [-V version] [-Z
timezone] infile outfile
iostat2pcp reads a text file created with iostat(1) (infile) and
translates this into a Performance Co-Pilot (PCP) archive with
the basename outfile. If infile is ``-'' then iostat2pcp reads
from standard input, allowing easy preprocessing of the iostat(1)
output with sed(1) or similar.
The resultant PCP archive may be used with all the PCP client
tools to graph subsets of the data using pmchart(1), perform data
reduction and reporting, filter with the PCP inference engine
pmie(1), etc.
A series of physical files will be created with the prefix
outfile. These are outfile.0 (the performance data),
outfile.meta (the metadata that describes the performance data)
and outfile.index (a temporal index to improve efficiency of
replay operations for the archive). If any of these files exists
already, then iostat2pcp will not overwrite them and will exit
with an error message.
The first output sample from iostat(1) contains a statistical
summary since boot time and is ignored by iostat2pcp, so the
first real data set is the second one in the iostat(1) output.
The best results are obtained when iostat(1) was run with its own
-t flag, so each output sample is prefixed with a timestamp.
Even better is -t with $S_TIME_FORMAT=ISO set in environment when
iostat(1) is run, in which case the timestamp includes the
timezone.
Note that if $S_TIME_FORMAT=ISO is not used with the -t option
then iostat(1) may produce a timestamp controlled by LC_TIME from
the locale that is in a format iostat2pcp cannot parse. The
formats for the timestamp that iostat2pcp accepts are illustrated
by these examples:
2013-07-06T21:34:39+1000
(for the $S_TIME_FORMAT=ISO).
2013-07-06 21:34:39
(for some of the European formats, e.g. de_AT, de_BE, de_LU
and en_DK.utf8).
06/07/13 21:34:39
(for all of the $LC_TIME settings for English locales outside
North America, e.g. en_AU, en_GB, en_IE, en_NZ, en_SG and
en_ZA, and all the Spanish locales, e.g. es_ES, es_MX and
es_AR).
In particular, note that some common North American $LC_TIME
settings will not work with iostat2pcp (namely, en_US, POSIX and
C) because they use the MM/DD format which may be incorrectly
converted with the assumed DD/MM format. This is another reason
to recommend setting $S_TIME_FORMAT=ISO.
If there are no timestamps in the input stream, iostat2pcp will
try and deduce the sample interval if basic Disk data (-d option
for iostat(1)) is found. If this fails, then the -t option may
be used to specify the sample interval in seconds. This option
is ignored if timestamps are found in the input stream.
The -S option may be used to specify as start time for the first
real sample in infile, where start must have the format HH:MM:SS.
This option is ignored if timestamps are found in the input
stream.
The -V option specifies the version for the output PCP archive.
By default the archive version $PCP_ARCHIVE_VERSION (set to 3 in
current PCP releases) is used, and the only values currently
supported for version are 2 or 3.
The -Z option may be used to specify a timezone. It must have
the format +HHMM (for hours and minutes East of UTC) or -HHMM
(for hours and minutes West of UTC). Note in particular that
neither the zoneinfo (aka Olson) format, e.g. Europe/Paris, nor
the Posix TZ format, e.g. EST+5 is allowed for the -Z option.
This option is ignored if ISO timestamps are found in the input
stream. If the timezone is not specified and cannot be deduced,
it defaults to ``UTC''.
Some additional diagnostic output is generated with the -v
option.
iostat2pcp is a Perl script that uses the PCP::LogImport Perl
wrapper around the PCP libpcp_import library, and as such could
be used as an example to develop new tools to import other types
of performance data and create PCP archives.
The available command line options are:
-S start
Specify the start time for the first sample.
-t interval
Specify the sample interval in seconds.
-v Print verbose output.
-Z timezone
Specify the timezone to use, see above.
iostat2pcp requires infile to have been created by the version of
iostat(1) from http://freshmeat.net/projects/sysstat .
iostat2pcp handles the -c (CPU), -d (Disk), -x (eXtended Disk)
and -p (Partition) report formats (including their -k, -m, -z and
ALL variants), but does not accommodate the -n (Network
Filesystem) report format from iostat(1); this is a demand-driven
limitation rather than a technical limitation.
Environment variables with the prefix PCP_ are used to
parameterize the file and directory names used by PCP. On each
installation, the file /etc/pcp.conf contains the local values
for these variables. The $PCP_CONF variable may be used to
specify an alternative configuration file, as described in
pcp.conf(5).
iostat(1), pmchart(1), pmie(1), pmlogger(1), sed(1),
Date::Format(3pm), Date::Parse(3pm), PCP::LogImport(3pm) and
LOGIMPORT(3).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to pcp@groups.io. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
(At that time, the date of the most recent commit that was found
in the repository was 2024-06-14.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Performance Co-Pilot PCP IOSTAT2PCP(1)
Pages that refer to this page: pcpcompat(1), pcp-iostat(1)
|
HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|