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grid: session - graphical interface for configuring tasks using grid-cpu(4) and grid-ns(1) resources




Session allows the user to build up a single namespace from various different namespace resources and configure a set of commands to be executed within this namespace. The execution then takes place on one or more selected grid-cpu(4) resources.

Once started, session presents a heirarchical view of currently registered resources (such as grid-ns(1)) that serve name spaces using 9P. (See intro(5) for a description of the protocol.) The top level displays the type of resource, for instance 'CPUresource', whilst the second level shows the name of each individual resource. Descending futher down the tree will reveal the attributes of the selected resource. To mount a resource and see the namespace it exports, click mouse button 3 on the resource name. The view will switch to a split pane view displaying the resource namespace with directories listed on the left and all files in the current directory displayed on the right.

Clicking mouse button 3 on a file or directory will cause it to be added to the command or namespace list at the bottom of the window. Mouse button 3 is again used on items in either of these lists to display a menu containing the name of the resource on which they are located as well as the option to remove them. The Cmd and Ns buttons located at the top of the window toggle the view between the selected commands and the selected namespace. The Resources button returns to the initial view containing the currently registered resources and Refresh updates the list in case any resources have been added or removed.

The Command List
This contains a list of all commands to be executed. Any arguments may be entered by clicking on the gap after args: and typing into the box. Commands will be executed in order from top (first) to bottom (last).

The Namespace List
This contains a list of all the directories to be imported in order to create the local namespace of the selected grid-cpu(4) resource(s). By default, several directories will be imported from the local machine. To select these, click button 3 on import local namespace and (un)check the directories as required. To toggle this option on and off, click button 1 on import local namespace. These default directories are required by many commands for normal execution so it is recommended that they are not disabled unless they are definitely not needed. Importing a directory of the same name as one of the default directories will automatically overwrite the default. Therefore, it is not necessary to disable a default directory if the same name is to be imported from elsewhere.

A given directory can only be imported once so it is not possible, for example, to import /usr/inferno from two different machines. Session will automatically import the directories containing each of the selected commands but any others required must be explicitly imported. For example: If one of the commands is:

	/usr/inferno/runme.dis -f /appl/lib

Session will import /usr/inferno/ but /appl/lib would have to be specified in the namespace list.

Once the command and namespace lists have been configured, click Ok on the Session window. This will bring up the grid-query(1) window containing a list of the available grid-cpu(4) resources. To select one or more of these for execution, click on the name with button 3 and it will be added to the list. If a specific grid-cpu(4) resource is not required, click button 3 on CPU resource and select the number you require by clicking on the number following the list entry and dragging the mouse up or down.

Once the required grid-cpu(4) resources have been selected, click Ok and execution will commence.




grid-query(1), registries(2) grid-ns(1), grid-cpu(4), registry(4)

GRID-SESSION(1 ) Rev:  Tue Mar 31 02:42:38 GMT 2015