Torrent Suite SoftwareAdministration Guide

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Torrent Suite Software space on Ion Community

Administration Guide TOC

Manage your SGE Cluster with QMON

QMON is a graphical tool to monitor and manage the SGE Cluster. With QMON you can do tasks such as the following:

• See the status of the servers in the cluster
• Check server CPU load and memory utilization
• See the status of jobs, are they running, completed, or still waiting in the queue
• Disable servers from accepting new jobs, and re-enable them later
• Delete jobs that are currently processing or waiting in queue
• And many other advanced configuration options

SGE is typically used in a cluster of several servers to distribute data processing jobs. With the Torrent Server, SGE is used in the cluster configuration and also in the single-server configuration. This design makes it it easy for users to start with one server and add more "compute nodes," as needed, to ramp up the data processing capacity.

Client OS support

A GUI is not installed on Torrent Server. Use ssh to start QMON remotely,

To display QMON on your desktop, you need a client that supports the X Windows protocol; a Linux client automatically includes X Windows support. There are numerous software packages that add X Windows functionality to Windows, but the easiest and most economical solution is to run Linux in a virtual machine on a Windows system.

Start QMON

To start QMON , login to the server with ssh , and include the -X option, this tells the server that you are going to be using an application that uses the X Windowsdisplay.

ssh -X ionadmin@ion-torrent-server

After you are logged into the server, just type QMON from the command line to launch the tool.

ionadmin@ion-torrent-server:~$ qmon

The server should be preconfigured to support QMON so you should not get any error message.

The most common error is that you forgot the -X option, which causes the following error when you try to start QMON :

ionadmin@ion-torrent-server:~$ qmon

Error: Can't open display:

Shortly after entering the QMON command, the "Grid Engine" splashscreen should appear, indicating your X Windows display is working. If you are on a slow connection, it may take a few seconds for the tool to launch. After a short time, the splashscreen automatically disappears.

When you see the following toolbar, QMON is ready to use:

There are many buttons here to access advanced options. Typically, only use the first two buttons on the upper-left: Job Control and Queue Control.

To get started with QMON , view the information displayed in Job Control and Queue Control and observe your jobs as they are processed by SGE.

Job Control

The Job Control screen shows you the job status.

You can delete jobs from this screen by highlighting the job then pressing the Delete button.

Queue Control

The Queue Control Screen shows the different servers that are available for processing jobs.

The used/total column shows the number of jobs currently running on the server ( used ), and the number of processing slots available on the server ( total ).This example shows seven processing slots available and six jobs currently being processed.

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