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 util-
     ity.

     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