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AND(8)			     Administrator's Tools			AND(8)

NAME
       and - auto nice daemon

SYNOPSIS
       and [-htvsx] [-i interval] [-c /path/to/and.conf] [-d /path/to/and.pri‐
       orities]

VERSION
       This manual page documents and version 1.0.7.

DESCRIPTION
       The auto nice daemon activates itself in certain intervals and  renices
       and even kills jobs according to their priority and CPU usage.

       Renice  levels  and  kill  signals  can	be  defined in terms of users,
       groups, and commands. Wildcards can be specified for any of  these.  In
       addition, commands can be specified using POSIX regular expressions. To
       allow for network-wide configuration and priority  files,  a  mechanism
       for  hostname-based  evaluation	is  provided, again supporting regular
       expressions for specifying host names.

       Jobs owned by root are left alone. Jobs are never  increased  in	 their
       priority.

       Here are some real-world examples:

       A  certain  user	 is  notorious for wasting CPU with next-to-irrelevant
       jobs.  One line is sufficient to renice all of his jobs	to  about  19.
       This  is	 a typical situation for a LART (Luser's Attitude Readjustment
       Tool) like and.

       A CPU server is dedicated to a certain group, but others may  also  use
       it  when	 it's  idle.  Just define default nice levels of e.g. 18 and a
       lower nice level for the privilegued group, say nice level 12.

       A certain web browser who shall remain unnamed tends to go berserk once
       in  a while. You can configure and to kill -9 it after e.g. 20 CPU min‐
       utes.

COMMAND-LINE OPTIONS
       -c /path/to/and.conf
	    Specifies  the  configuration  file.  If  this  flag  is  omitted,
	    /etc/and.conf is used instead.

       -d /path/to/and.priorities
	    Specifies  the  priority  database	file. If this flag is omitted,
	    /etc/and.priorities is used instead.

       -h   Produces a short help text.

       -i interval
	    Sets the interval between nice level checks. This  flag  overrides
	    the	 interval  specified  in  the  configuration file, if any. The
	    default interval of 60 seconds is used if neither -i nor an inter‐
	    val directive in the configuration file is given.

       -s   Log to stdout. Without this switch, logging goes to syslog (normal
	    operations) or ./debug.and (test mode). Useful for debugging  con‐
	    fig files.

       -t   Run	 in test mode only, i.e. don't really renice or kill anything.
	    In this mode, logging goes into ./debug.and instead of syslog.

       -v   Increase verbosity. For maximum verbosity, this flag can be speci‐
	    fied  multiple  times.  Be	warned that this will blow up your log
	    files, so you should use it in test mode only.

       -x   Run in full operational mode, i.e. really renice or	 kill  things.
	    This is the default.

SIGNALS
       On  kill	 -HUP  the auto nice daemon will reload its configuration file
       and priority database.

FILES
       /etc/and.conf
	    General configuration file. Stores	default	 nice  level,  default
	    interval, the "time zones" and the database lookup affinity.

       /etc/and.priorities
	    The	 priority database (in plain text). Contains the (user, group,
	    command, nicelevels) tuples.

       Both files have their own manual pages.

       ./debug.and
	    Contains logging and status information  for  debugging  purposes.
	    Used in test mode only.

SEE ALSO
       and.conf(5), and.priorities(5), kill(1), regex(7), renice(8)

INTERNET
       http://and.sourceforge.net/

AUTHOR
       The  auto  nice	daemon	and  this  manual page were written by Patrick
       Schemitz <schemitz@users.sourceforge.net>

Unix				  27 Jan 2002				AND(8)
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