nnspew - subject database manager (nn)
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
$db/subjects subject database
nn(1), nngrab(1), egrep(1)
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.
nnmaster should automatically append new articles to the subject
database to keep it up-to-date, and thus require less frequent
rebuilding using nnspew.
James A. Woods, NASA Ames Research Center