NAME

       trimhistory - Remove old Xymon history-log entries

SYNOPSIS

       trimhistory --cutoff=TIME [options]

DESCRIPTION

       The  trimhistory  tool  is  used  to  purge old entries from the Xymon history logs. These
       logfiles accumulate information about all status changes that have occurred for any  given
       service, host, or the entire Xymon system, and is used to generate the event- and history-
       log webpages.

       Purging old entries can be done while Xymon is running, since the tool takes care  not  to
       commit  updates  to  a file if it changes mid-way through the operation. In that case, the
       update is aborted and the existing logfile is left untouched.

       Optionally, this tool will also remove logfiles from hosts that are no longer  defined  in
       the  Xymon hosts.cfg(5) file. As an extension, even logfiles from services can be removed,
       if the service no longer has a valid status-report logged in the current Xymon status.

OPTIONS

       --cutoff=TIME
              This defines the cutoff-time when processing the history logs. Entries dated before
              this  time  are  discarded.  TIME  is  specified as the number of seconds since the
              beginning of the Epoch. This is easily generated by the GNU date(1)  utility,  e.g.
              the following command will trim history logs of all entries prior to Oct. 1st 2004:

                  trimhistory --cutoff=`date +%s --date="1 Oct 2004"`

       --outdir=DIRECTORY
              Normally,  files  in  the  XYMONHISTDIR  directory are replaced. This option causes
              trimhistory to save the shortened history logfiles to another directory, so you can
              verify that the operation works as intended. The output directory must exist.

       --drop Causes  trimhistory  to  delete  files  from  hosts  that  are  not  listed  in the
              hosts.cfg(5) file.

       --dropsvcs
              Causes trimhistory to delete files from services that are not currently tracked  by
              Xymon. Normally these files would be left untouched if only the host exists.

       --droplogs
              Process  the XYMONHISTLOGS directory also, and delete status-logs from events prior
              to the cut-off time. Note that this can dramatically increase the processing  time,
              since there are often lots and lots of files to process.

       --progress[=N]
              This  will  cause  trimhistory  to output a status line for every N history logs or
              status-log collections it processes, to indicate how far  it  has  progressed.  The
              default setting for N is 100.

       --env=FILENAME
              Loads the environment from FILENAME before executing trimhistory.

       --debug
              Enable debugging output.

FILES

       $XYMONHISTDIR/allevents
              The eventlog of all events that have happened in Xymon.

       $XYMONHISTDIR/HOSTNAME
              The per-host eventlogs.

       $XYMONHISTDIR/HOSTNAME.SERVICE
              The per-service eventlogs.

       $XYMONHISTLOGS/*/*
              The historical status-logs.

ENVIRONMENT VARIABLES

       XYMONHISTDIR
              The directory holding all history logs.

       XYMONHISTLOGS
              The top-level directory for the historical status-log collections.

       HOSTSCFG
              The  location  of  the hosts.cfg file, holding the list of currently known hosts in
              Xymon.

SEE ALSO

       xymon(7), hosts.cfg(5)