AND.CONF(5)                                                        File Formats                                                        AND.CONF(5)

NAME

       /etc/and.conf - general configuration parameters for the auto nice daemon.

VERSION

       This manual page documents and.conf for and version 1.2.2.

DESCRIPTION

       This  is the general configuration file for and.  It stores settings like the default nice level, the renice intervals, the three stages of
       renicing, and the affinity of the priority database, i.e. the weight of (user, group, command) when resolving nice levels  from  the  data-
       base. These settings are described below.

       Comments  start with a # in the first column.  Empty lines are ignored. Unlike with other configuration files, lines cannot be concatenated
       with a backslash. Furthermore, this file is case sensitive.

       and allows for host-specific sections in the configuration file. These work as lines of the form on  somehost  and  work  as  follows:  the
       parser  determines if the host name (as returned by gethostname) matches the extended regular expression that follows the on keyword. If it
       does, it just keeps processing the file as if nothing had happened. If it does not match, however, everything up to the next on keyword  is
       skipped. So if you want to end a host-specific section, you must write on .*  (which matches all hosts) to switch back to normal.

       Don't forget to kill -HUP the auto nice daemon to enable the changes.

SETTINGS

       defaultnice
            The  default  nice  level.  A number between 0 and 19. Jobs for which no entry can be found in /etc/and.priorities are reniced to this
            level, regardless of the CPU time they've used so far. If you prefer to renice unknown jobs gradually, you  can  do  so  by  supplying
            three asterisks as (user, group, command) tuple in /etc/and.priorities.  The default nice level is 0

       interval
            The  default  interval  between  nice  checks of the auto nice daemon, in seconds. This value can be overridden by the -i command-line
            option of and.  The default interval is 60 seconds.

       lv1time

       lv2time

       lv3time
            Ranges for the nice levels. Jobs with less than lv1time seconds CPU time are not reniced; jobs between lv1time and lv2time seconds are
            reniced to the first level in an.priorities; jobs between lv2time and lv3time seconds to the second level; jobs with more than lv3time
            seconds are reniced to the third level.  Defaults are 120 , 1200 , and 3600 seconds.

       minuid, mingid
            Minimum user id and group id to be considered for renicing.  Processes whose user id is below minuid are left alone, as are  processes
            with a group id of below mingid.  (Note that even if you set minuid to zero, root processes are left alone.)

       affinity
            Strategy for picking the right priority entry for a user/group/job triple. The strategy is a permutation of "cgu", "c"ommand, "g"roup,
            "u"ser. The order specifies the affinity of the priority lookup method. Suppose you have an entry for all jobs of  user  foo,  another
            entry  for  all  jobs of group bar, and yet another entry for the command baz.  Furthermore suppose user foo (who happens to belong to
            group bar ) starts a job named baz -- which entry should be chosen? This is what the affinity setting means, for example  "cug"  means
            an exact match of the command has priority over both an exact match of the user and the group. The default affinity is "cug", which is
            probably sensible for most cases, since it's the job which takes up CPU time, not the user or group ID.

EXAMPLES

       Default Configuration
            # This is the default configuration:
            defaultnice 0
            interval 60
            lv1time 300
            lv2time 1800
            lv3time 3600
            affinity cug
            minuid 0
            mingid 0

       Default Configuration, with terminals
            # Normal default configuration for all
            defaultnice 0
            interval 60
            lv1time 300
            lv2time 1800
            lv3time 3600
            # Hosts foo, bar, baz are terminals and must
            # be more responsive, so earlier renice.
            on (foo|bar)
            lv1time 120
            lv2time 600
            lv3time 1200
            on .*
            # This is for all hosts again
            affinity cug

       Group-specific Hosts
            defaultnice 0
            interval 60
            lv1time 300
            lv2time 1800
            lv3time 3600
            # Normal affinity for all hosts.
            affinity cug
            # Hosts bar, baz belong to group foo, which
            # is privileged on these hosts, so override
            # affinity. (Note regexp!)
            on ba[rz]
            affinity guc
            on .*
            minuid 500
            mingid 100

FILES

       /etc/and.conf
            General configuration file. Stores default nice level, default interval, the "time zones" and the database lookup  affinity.  This  is
            what this manual page is about.

SEE ALSO

       and(8), 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 Mar 2005                                                        AND.CONF(5)