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-.TH CPU 4
-.SH NAME
-cpu \- cpu server resource
-.SH SYNOPSIS
-.B grid/srv/cpu
-.br
-.B grid/runcpu
-.SH DESCRIPTION
-.I Cpu
-is a file server that provides a processing resource. This resource imports a namespace from one or more external sources and executes selected commands within it. 
-.I Cpu
-creates its own namespace containing three files
-.BR ctl ,
-.B cmd
-and
-.B ns
-which are used to configure the processing task prior to execution, this namespace is exported and served on 
-.I stdin.
-In order to configure a processing task, a client must first mount the
-.I cpu
-namespace. Once this is done, reading the 
-.B cmd
-and
-.B ns
-files will display the current configuration of commands to be executed or directories to be imported respectively. The 
-.B ctl
-file is used to modify the current configuration and accepts the following input:
-.IP
-.B add cmd 
-.I command
-.IP
-.B add ns 
-.I path address
-.IP
-.B del [cmd|ns]
-.I index
-.PP
-Where
-.I command
-is the name (including full path and parameters) of a command to be executed.
-.I Path
-is the name of a directory to import from the exported namespace available at 
-.I address
-and 
-.I index
-is the index (as shown when reading the
-.B cmd
-and
-.B ns
-files) of the command or directory to be removed from the configuration.
-.PP
-For example, to import
-.B /dis
-and
-.B /dev
-from a resource exporting a Styx (see
-.IR intro(5))
-namespace at address
-.B tcp!200.1.5.53!7003
-and then run 
-.B ls -l 
-and
-.BR du ,
-the following commands would be used:
-.IP
-.B "echo 'add cmd /dis/ls -l' > ctl"
-.br
-.B "echo 'add cmd /dis/du' > ctl"
-.br
-.B "echo 'add ns /dis tcp!200.1.5.53!7003' > ctl"
-.br
-.B "echo 'add ns /dev tcp!200.1.5.53!7003' > ctl"
-.PP
-Reading the
-.B cmd
-and 
-.B ns
-files will give the following output:
-.IP
-.B cmd
-.br
-.B 1: /dis/ls -l
-.br
-.B 2: /dis/du
-.IP
-.B ns
-.br
-.B 1: /dis (200.1.5.53!7003)
-.br
-.B 2: /dis (200.1.5.53!7003)
-.PP
-Once the client disconnects from (unmounts) the cpu, the selected namespaces will be imported and the commands executed. Note: A 
-.I cpu
-does not have
-.I any
-namespace of its own. All required namespaces
-.I must
-be imported, for a simple command such as
-.BR ls ,
-the minimum recommended namespace to import would be:
-.B /chan /dev /dis /module
-.PP
-.IR Register (1)
-may be used in conjunction with 
-.I cpu
-to register it with a 
-.IR registry(4)
-and to export and serve its namespace across
-.IR dial(2) 
-network connections. Incoming connections may also be displayed visually using
-.IR monitor (1).
-For example:
-.PP
-.BI "grid/register [" " options ..." " ] { grid/srv/cpu } | grid/srv/monitor 2 'CPU resource'
-.PP
-This set of commands is encapsulated within the shell script
-.I runcpu
-which will automatically register 
-.I cpu
-with a
-.IR registry(4)
-if possible and start up the graphical display to show connections to the resource. There is no need for the user to execute
-.I cpu
-outside of
-.I runcpu
-unless the namespace it provides is required to be accessible in a different way to that provided by
-.IR register (1).
-.SH SOURCE
-.B /appl/grid/srv/cpu.b
-
-.SH BUGS
-At the moment,
-.I Cpu
-will only import namespaces across an unauthenticated connection as provided by
-.IR ns (1).
-
-.SH "SEE ALSO"
-.IR monitor (1),
-.IR ns (1),
-.IR register (1),
-.IR session (1)