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ProcedureInstalling a Master Host

You can configure only one managed host to be the master host. If you have already configured a master and you select the Install Master sub-menu item, a message appears that you have already configured a master for the compute grid.

The Grid Engine module deploys only a dedicated N1GE6 master host. Unless you plan to have relatively low job throughput on your grid, you should not have the N1GE6 master host also act as a compute host. To add a host as a master host in the compute grid, you must first import the host into the SCS 2.2 framework. For more information, see "About Adding Managed Hosts" in the SCS 2.2 Release Notes.


Note - The SCS server cannot server as an N1 Grid Engine (N1GE) Master Host or Compute Host, since only SCS clients can have those roles. An SCS server cannot also be an SCS client at the same time. Thus, the SCS server has to be a different host than either the N1GE Master Host or Compute Hosts.


To install a master host for the grid:

Steps
  1. Select Grid Engine > Install Master.

    The selector appears, displaying the list of managed hosts; see Installing Grid Engine Hosts.

  2. Click to highlight the managed host that you want to configure as the master host in the compute grid.

  3. Pick a Version from the list presented

    The version picked at this step will be installed on the Master as well as all the hosts in the grid

  4. Click Install in the bottom right corner.

    The Task Progress dialog appears.

    Figure 1-6 Install Master Dialog

    install master dialog

ProcedureInstalling Compute and Access Hosts

Once you have configured one of the managed hosts as the master host, you can add additional hosts to act as compute hosts or access hosts in the grid.


Note - To add a host as a compute host in the grid, you must first import the host into the Sun Control Station framework. For more information, see "About Adding Managed Hosts" in the SCS 2.2 Product Notes.



Note - Before you can add a compute host to a grid, you must first designate a master host. If you have not yet designated a master host, the system instructs you to do so. For more information see, Installing Grid Engine Hosts.


Steps
  1. Select Grid Engine > Install Compute Host.

    The selector appears, displaying the list of managed hosts; see the previous figure.

  2. Click to highlight a host(s). You can also click Select All at the top to choose all hosts in the list.

    You can pick the host(s) to be either compute or access hosts. Pick the desired button at the bottom of the page labelled "Install Compute Hosts" or "Install Access Hosts"

    Figure 1-7 Install Compute Hosts Dialog

    install compute hosts

    The Task Progress dialog appears. When the installation completes, a new dialog box appears which allows you to either finish the installation or view the installation events. If you choose View Events, a dialog similar to the following appears.

    Figure 1-8 View Events Dialog

    view events dialog
  3. When you are finished installing hosts, click Done.

Monitoring the Grid

When you click the Monitor Grid menu item, a page with a high-level overview of the state of the grid appears.

This page has tables that allow you to:

  • View Summary Status

  • Examine Cluster Queue status

  • Check Job Alerts

  • Check Host Alerts

  • Check Queue Alerts

Buttons on the main page let you go to pages where you can:

  • View Job Details

  • View Queue Details

  • View Host Details

  • Examine Daemon Log files

Also available from the SCS menu is the ability to quickly see the state of the Grid by choosing Station Settings >Active Monitor.

Viewing Summary Status

Figure 1-9 Summary Status Table

summary status table

The Summary Status table shows the total number of jobs in various states (pending, running, suspended, and so forth). It also shows the load averaged across all compute hosts and the total amount of used and installed memory summed over all compute hosts.

Updating Data

The subheading of this table contains a timestamp for when the data was obtained. By default, most monitoring data is automatically refreshed every minute. To display the most up-to-date database information in the tables, click the Monitor Grid menu item again. You can also reload the browser window. If the monitoring is not working properly for any reason, the subheading displays a warning and displays the timestamp for when the data was most recently obtained. This timestamp applies to all monitoring information displayed in GEMM, not just the Summary Status table.

Above this table is the Update button. Clicking this button retrieves the data immediately instead of waiting for the next one-minute interval. A progress bar shows the progress of the update. When the update completes, click the Done button to return to the main Monitor Grid page with the new data and updated timestamp.

If an update of the monitor is already in progress when you click the button, a message indicate this situation. As soon as the update in progress completes, the Update button will again be available to force a new update.

Viewing Jobs

You access the Jobs details page by clicking the Jobs button in the Summary Status table on the main Monitor page.

This page has a table which shows a summary of all current jobs in the system including jobs which are pending, running, suspended, held, or in an error state. Completed jobs are not listed. The top row of three buttons lets you see the list of jobs according to three different views: Overview, Utilization, and Allocation.

The initial view is always the Overview. Clicking any of the other buttons displays the other corresponding views. In all views, the back button on the table leads back to the main page.

Also present in all views at the bottom of the frame is the Filter, which you can use to limit the jobs displayed by providing configured criteria. Finally, the three buttons corresponding to the three different views are always shown at the top of each view, allowing you to move directly among the three views.

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