NNSPEW(8)                 UNIX System V(Release 6.4)                  NNSPEW(8)


NAME
      nnspew - subject database manager (nn)

SYNOPSIS
      nnspew

DESCRIPTION
      nnspew builds a sorted database of all available subjects in the nn
      article database for fast access via the nngrab utility.

      nnspew should be activated regularly to rebuild the subject database,
      e.g. by cron.  For example:
         2 6,9,12,15,18,21 * * *  root /bin/nice /usr/lib/nn/nnspew

      Cross posted articles are only represented in the database once, and
      identical subjects in each group are merged into one to use a minimum of
      disk space.  This saves about 50% of the disk space otherwise required.

FILES
      $db/subjects   subject database

SEE ALSO
      nn(1), nngrab(1), egrep(1)

NOTES
      nngrap will use the subject database generated by nnspew independent of
      its age.  Thus, if you stop running nnspew, remember to remove the
      subjects file as well.

BUGS
      nnmaster should automatically append new articles to the subject database
      to keep it up-to-date, and thus require less frequent rebuilding using
      nnspew.

AUTHOR
      James A. Woods, NASA Ames Research Center
      E-mail: jaw@ames.arc.nasa.gov

















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