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
(for the $S_TIME_FORMAT=ISO).
(for some of the European formats, e.g. de_AT, de_BE, de_LU and
(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
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 -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.
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).
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
firstname.lastname@example.org. This page was obtained from the project's upstream
Git repository ⟨git://git.pcp.io/pcp⟩ on 2017-03-13. 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
Performance Co-Pilot PCP IOSTAT2PCP(1)