pmnsmerge - Online in the Cloud

PROGRAM:

NAME

pmnsmerge - merge multiple versions of a Performance Co-Pilot PMNS

SYNOPSIS

$PCP_BINADM_DIR/pmnsmerge [-adfxv] infile [...] outfile

DESCRIPTION

pmnsmerge merges multiple instances of a Performance Metrics Name Space (PMNS), as used by
the components of the Performance Co-Pilot (PCP).

Each infile argument names a file that includes the root of a PMNS, of the form

root {
/* arbitrary stuff */
}

The order in which the infile files are processed is determined by the presence or absence
of embedded control lines of the form #define _DATESTAMP YYYYMMDD

Files without a control line are processed first and in the order they appear on the
command line. The other files are then processed in order of ascending _DATESTAMP.

The -a option suppresses the argument re-ordering and processes all files in the order
they appear on the command line.

The merging proceeds by matching names in PMNS, only those new names in each PMNS are
considered, and these are added after any existing metrics with the longest possible
matching prefix in their names. For example, merging these two input PMNS

root { root {
surprise 1:1:3
mine 1:1:1 mine 1:1:1
foo foo
yawn
yours 1:1:2
} }
foo { foo {
fumble 1:2:1
mumble 1:2:3
stumble 1:2:2 stumble 1:2:2
} }
yawn {
sleepy 1:3:1
}

Produces the resulting PMNS in out.

root {
mine 1:1:1
foo
yours 1:1:2
surprise 1:1:3
yawn
}
foo {
fumble 1:2:1
stumble 1:2:2
mumble 1:2:3
}
yawn {
sleepy 1:3:1
}

To avoid accidental over-writing of PMNS files, outfile is expected to not exist when
pmnsmerge starts. The -f option allows an existing outfile to be unlinked (if possible)
and truncated before writing starts.

Normally duplicate names for the same Performance Metric Identifier (PMID) in a PMNS are
allowed. The -d option is the default option and is included for backwards compatibility.
The -x option reverses the default and pmnsmerge will report an error and exit with a non-
zero status if a duplicate name is found for a PMID in any of the input PMNS files or in
the merged output PMNS.

The -v option produces one line of diagnostic output as each infile is processed.

Once all of the merging has been completed, pmnsmerge will attempt to load the resultant
namespace using pmLoadASCIINameSpace(3) - if this fails for any reason, outfile will still
be created, but pmnsmerge will report the problem and exit with non-zero status.

Using pmnsmerge with a single input argument allows that PMNS file to be checked. In
addition to syntactic checking, specifying -x will also enable a check for duplicate names
for all PMIDs.

CAVEAT

Once the writing of the new outfile file has begun, the signals SIGINT, SIGHUP and SIGTERM
will be ignored to protect the integrity of the new file.

PCP ENVIRONMENT

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).

Use pmnsmerge online using onworks.net services