Provided by: pcp_3.10.8build1_amd64 bug


       pmloglabel - check and repair a performance metrics archive label


       pmloglabel [-Llsv] [-h hostname] [-p pid] [-V version] [-Z timezone] archive


       pmloglabel  verifies,  reports on, and can modify all details of the labels in each of the
       files of a Performance Co-Pilot (PCP) archive log.  The archive  log  has  the  base  name
       archive and must have been previously created using pmlogger(1).

       Each  of  the  files  in  a  PCP  archive  (metadata, temporal index, and one or more data
       volumes) must contain a valid label at the start, else the PCP tools will refuse  to  open
       the archive at all.

       Thus,  the  primary  function  of  pmloglabel  is to be able to repair any inconsistent or
       corrupt label fields, such that the entire archive is not lost.  It  will  not  check  the
       remainder of the archive, but it will give you a fighting chance to recover otherwise lost
       data.  Together, pmloglabel and pmlogextract are able to produce a valid PCP archive  from
       many forms of corruption.

       Note  that  if the temporal index is found to be corrupt, the "*.index" file can be safely
       moved aside and the archive will still be accessible, however retrievals may  take  longer
       without the index.

       The  options control the specific information to be reported, or the specific fields to be

       -h   Modify the logged hostname in the archive label, for all files in the archive.

       -l   Dump out the archive label, showing the log format version, the time and date for the
            start  and  (current)  end  of  the  archive, and the host from which the performance
            metrics values were collected.

       -L   Like -l, just a little more verbose, showing also the timezone  and  creator  process
            identifier from the archive label.

       -p   Set  the  process identifier stored in the archive label to pid, for all files in the

       -s   Rewrite the sentinel values which precede and follow the archive label, for all files
            in the archive.

       -v   Verbose mode.  Additional progress information is produced at each step.

       -V   Stamp  the  version  number  into  the magic number field at the start of the archive
            label, for all files in the archive.

       -Z   Changes the timezone in  the  archive  labels  to  timezone  in  the  format  of  the
            environment variable TZ as described in environ(7).


       The  following demonstrates the use of pmloglabel in finding and then correcting a corrupt
       field (PID) in the label of the temporal index of an archive named "20080125".

                 $ pmdumplog -l 20080125
                 pmdumplog: Cannot open archive "20080125": Illegal label record at start of a PCP archive log file
                 $ pmloglabel 20080125
                 Mismatched PID (5264/5011) between temporal index and data volume 0
                 $ pmloglabel -p 5264 20080125
                 $ pmdumplog -l 20080125
                 Log Label (Log Format Version 2)
                 Performance metrics from host fw1
                   commencing Fri Jan 25 00:10:09.341 2008
                   ending     Sat Jan 26 00:09:54.344 2008


       pmloglabel exits with status 0 if the archive labels are clean.  If  invoked  incorrectly,
       the  exit  status  will  be 1.  If corruption is detected and still exists at the end, the
       exit status will be 2.  If requested to write out the archive labels, and some  aspect  of
       that write out fails, then the exit status will be 3.


                 Default   directory  for  PCP  archives  containing  performance  metric  values
                 collected from the host hostname.


       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).


       PCPIntro(1),     pmlogcheck(1),     pmlogextract(1),    pmlogger(1),    pmlogger_check(1),
       pmlogger_daily(1), pmlogrewrite(1), pcp.conf(5), and pcp.env(5).