PCP2JSON(1)                General Commands Manual               PCP2JSON(1)

NAME         top

       pcp2json - pcp-to-json metrics exporter

SYNOPSIS         top

       pcp2json [-CGHILrvVxXz?]  [-a archive] [--archive-folio folio] [-A
       align] [-b space-scale] [-c config] [--container container]
       [--daemonize] [-e derived] [-f format] [-F outfile] [-h host] [-i
       instances] [-K spec] [-O origin] [-P precision] [-q count-scale] [-s
       samples] [-S starttime] [-t interval] [-T endtime] [-y time-scale]
       [-Z timezone] metricspec [...]

DESCRIPTION         top

       pcp2json is a customizable performance metrics exporter tool from PCP
       to JSON.  Any available performance metric, live or archived, system
       and/or application, can be selected for exporting using either
       command line arguments or a configuration file.

       pcp2json is a close relative of pmrep(1).  Please refer to pmrep(1)
       for the metricspec description accepted on pcp2json command line and
       pmrep.conf(5) for description of the pcp2json.conf configuration file
       overall syntax, this page describes pcp2json specific options and
       configuration file differences with pmrep.conf(5).

       Only the command line options listed on this page are supported,
       other options recognized by pmrep(1) are not supported.

       Configuration file options override the corresponding built-in
       default values (if any).  Command line options override the
       corresponding configuration file options (if any).


       pcp2json uses a configuration file with overall syntax described in
       pmrep.conf(5).  The following options are common with pmrep.conf:
       version, source, speclocal, derived, header, globals, samples,
       interval, type, ignore_incompat, instances, omit_flat, precision,
       count_scale, space_scale, time_scale.  The output option is
       recognized but ignored for pmrep.conf compatibility.

       pcp2json specific options

       extended (boolean)
           Write extended information about metrics.  Corresponding command
           line option is -x.  Default is no.

       everything (boolean)
           Write everything known about metrics, including PCP internal IDs.
           Corresponding command line option is -X.  Default is no.


       The available command line options are:

       -a   Performance metric values are retrieved from the set of
            Performance Co-Pilot (PCP) archive log files identified by the
            argument archive, which is a comma-separated list of names, each
            of which may be the base name of an archive or the name of a
            directory containing one or more archives.

            Read metric source archives from the PCP archive folio (see

       -A   Force the initial sample to be aligned on the boundary of a
            natural time unit align.  Refer to PCPIntro(1) for a complete
            description of the syntax for align.

       -b   Unit/scale for space (byte) metrics, possible values include
            bytes, Kbytes, KB, Mbytes, MB, and so forth up to Ebytes, EB.
            This option will not override possible per-metric
            specifications.  See also pmParseUnitsStr(3).

       -c   Specify the config file to use.  The default is the first found
            of: ./pcp2json.conf, $HOME/.pcp2json.conf,
            $HOME/pcp/pcp2json.conf, and $PCP_SYSCONF_DIR/pcp2json.conf.
            For details, see the above section and pmrep.conf(5).

            Fetch performance metrics from the specified container, either
            local or remote (see -h).

       -C   Exit before reporting any values, but after parsing the
            configuration and metrics and printing possible headers.

            Daemonize on startup.

       -e   Specify derived performance metrics. If derived starts with a
            slash (``/'') or with a dot (``.'') it will be interpreted as a
            derived metrics configuration file, otherwise it will be
            interpreted as comma-separated derived metric expressions.  For
            details see pmLoadDerivedConfig(3) and pmRegisterDerived(3).

       -f   Use the format string for formatting the timestamp.  The format
            will be used with Python's datetime.strftime method which is
            mostly the same as that described in strftime(3).  The default
            with stdout is %H:%M:%S.  The default with csv is %Y-%m-%d

       -F   Specify the output file outfile.

       -G   Do not include global metrics in reporting (see pmrep.conf(5)).

       -h   Fetch performance metrics from pmcd(1) on host, rather than the
            default localhost.

       -H   Do not print any headers.

       -i   Report only the listed instances (if present).  By default all
            current instances are reported.  This is a global option that is
            used for all metrics unless a metric-specific instance
            definition is provided as part of a metricspec.  By default
            metrics without instances are reported as usual, use -v to
            change this.  Please refer to pmrep(1) for more details on this

       -I   Ignore incompatible metrics. By default incompatible metrics
            (that is, their type is unsupported or they cannot be scaled as
            requested) will cause pcp2json to terminate with an error
            message.  With this option all incompatible metrics are silently
            omitted from reporting. This may be especially useful when
            requesting non-leaf nodes of the PMNS tree for reporting.

       -K   When fetching metrics from a local context (see -L), the -K
            option may be used to control the DSO PMDAs that should be made
            accessible.  The spec argument conforms to the syntax described
            in __pmSpecLocalPMDA(3).  More than one -K option may be used.

       -L   Use a local context to collect metrics from DSO PMDAs on the
            local host without PMCD.  See also -K.

       -O   When reporting archived metrics, start reporting at origin
            within the time window (see -S and -T).  Refer to PCPIntro(1)
            for a complete description of the syntax for origin.

       -P   Use precision for numeric non-integer output values.  The
            default is to use 3 decimal places (when applicable).

       -q   Unit/scale for count metrics, possible values include count x
            10^-1, count, count x 10, count x 10^2, and so forth from 10^-8
            to 10^7.  (These values are currently space-sensitive.)  This
            option will not override possible per-metric specifications.
            See also pmParseUnitsStr(3).

       -r   Output raw metric values, do not convert cumulative counters to
            rates.  This option will override possible per-metric

       -s   The argument samples defines the number of samples to be
            retrieved and reported.  If samples is 0 or -s is not specified,
            pcp2json will sample and report continuously (in real time mode)
            or until the end of the set of PCP archives (in archive mode).
            See also -T.

       -S   When reporting archived metrics, the report will be restricted
            to those records logged at or after starttime.  Refer to
            PCPIntro(1) for a complete description of the syntax for

       -t   The default update interval may be set to something other than
            the default 1 second.  The interval argument follows the syntax
            described in PCPIntro(1), and in the simplest form may be an
            unsigned integer (the implied units in this case are seconds).
            See also the -T option.

       -T   When reporting archived metrics, the report will be restricted
            to those records logged before or at endtime.  Refer to
            PCPIntro(1) for a complete description of the syntax for

            When used to define the runtime before pcp2json will exit, if no
            samples is given (see -s) then the number of reported samples
            depends on interval (see -t).  If samples is given then interval
            will be adjusted to allow reporting of samples during runtime.
            In case all of -T, -s, and -t are given, endtime determines the
            actual time pcp2json will run.

       -v   Omit single-valued ``flat'' metrics from reporting when
            instances were requested.  See -i and -I.

       -V   Display version number and exit.

       -x   Write extended information.

       -X   Write everything known about metrics, including PCP internal

       -y   Unit/scale for time metrics, possible values include nanosec,
            ns, microsec, us, millisec, ms, and so forth up to hour, hr.
            This option will not override possible per-metric
            specifications.  See also pmParseUnitsStr(3).

       -z   Use the local timezone of the host that is the source of the
            performance metrics, as identified by either the -h or the -a
            options.  The default is to use the timezone of the local host.

       -Z   Use timezone for the date and time.  Timezone is in the format
            of the environment variable TZ as described in environ(7).  Note
            that when including a timezone string in output, ISO 8601 -style
            UTC offsets are used (so something like -Z EST+5 will become

       -?   Display usage message and exit.

FILES         top

                 pcp2json configuration file (see -c).


       Environment variables with the prefix PCP_ are used to parametrize
       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).

SEE ALSO         top

       mkaf(1), PCPIntro(1), pcp(1), pcp2elasticsearch(1), pcp2graphite(1),
       pcp2influxdb(1), pcp2xlsx(1), pcp2xml(1), pcp2zabbix(1), pmcd(1),
       pminfo(1), pmrep(1), __pmSpecLocalPMDA(3), pmLoadDerivedConfig(3),
       pmParseUnitsStr(3), pmRegisterDerived(3), pcp.conf(5), pmlogger(5),
       pmns(5), pmrep.conf(5) and environ(7).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2017-11-25.  (At that time, the date of the most recent commit that
       was found in the repository was 2017-11-24.)  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

Performance Co-Pilot                 PCP                         PCP2JSON(1)

Pages that refer to this page: pcp2elasticsearch(1)pcp2graphite(1)pcp2influxdb(1)pcp2xlsx(1)pcp2zabbix(1)pmrep(1)