Managing ArcIMS Virtual Servers using Administrator expand/collapse all
Related Topics

Overview of Spatial Servers, Virtual Servers, and ArcIMS services

Managing ArcIMS Virtual Servers using Service Administrator

Administering an ArcIMS site from the command line

expand/collapse item About managing Virtual Servers

Before you get started managing Virtual Servers, you should understand the terms Spatial Server, Virtual Server, and ArcIMS service.

You use Virtual Servers to manage Spatial Servers. To help with managing your site, you may want to add additional Virtual Servers. Some common reasons for adding a Virtual Server are:

If you no longer need a Virtual Server, you can remove it. However, before removing a Virtual Server

Only Virtual Servers you added can be deleted. The default Virtual Servers created during installation cannot be deleted.

You can add additional instances to your Spatial Servers through Virtual Server management. In general, the default value of two instances per Spatial Server is the recommendation. You should only increase the number of threads if the CPU for the Spatial Server process appears underutilized. For more information, see Understanding load factors.

expand/collapse item How to manage Virtual Servers

expand/collapse item Adding a Virtual Server

  1. Click Servers in the left panel.
  2. Click the New Virtual Server button New Virtual server button in the Administrator toolbar.

    The New Virtual Server dialog box appears.

  3. Type a name for the new Virtual Server.
  4. Click the Server Type dropdown arrow, and click a server type.
  5. Type a description of the new Virtual Server.
  6. The right panel displays a list of Spatial Servers available for use with this Virtual Server type.
    • Click New Server if none are listed or additional servers are desired. This opens the Add Server dialog.

    • Select a Computer Name and click OK.
  7. Check one or more Spatial Servers to associate with the new Virtual Server.
  8. Specify the number of instances.
  9. If Spatial Server recycling is enabled for the Virtual Server type, set the frequency and start time for recycling.
  10. Click OK.

The new Virtual Server appears in the bottom right panel.

expand/collapse item Removing a Virtual Server

  1. Click Servers in the left panel.
  2. Click the Virtual Server to remove.
  3. Click the Remove button Remove button in the Administrator toolbar.

    You will not be able to remove the Virtual Server if one or more Spatial Servers are associated with it. If this is the case, a message tells you which associations are still in place. You must remove this association.

  4. Click Yes to confirm removal.

    The selected Virtual Server is removed from the list of Virtual Servers.

expand/collapse item Modifying Virtual and Spatial Server associations

  1. Click Servers in the left panel.
  2. Click a Virtual Server in the bottom right panel.
  3. Click the Properties button Properties button in the Administrator toolbar.

    The right panel displays a list of Spatial Servers available for use with this Virtual Server type.

  4. Click in the check box to the left of the Spatial Server to add or remove its association with this Virtual Server.
  5. Click OK.

expand/collapse item Changing the number of instances

You should change the number of instances only after reviewing the CPU usage of your site.

  1. Click Servers in the left panel.
  2. Click a Virtual Server in the bottom right panel.
  3. Click the Properties button Properties button in the administrator toolbar.
  4. Double-click the number in the Instances column, type a new number.

    If you are unable to edit an instance value currently set at 1, then that type of Virtual Server has been limited to a single instance per Spatial Server.

  5. Press Enter after typing a new number. If you do not press Enter, your changes will be ignored.
  6. Click OK to close the Virtual Server Properties dialog box.

expand/collapse item Getting statistics

  1. In Administrator, click Servers in the left panel.
  2. Click the Virtual Server for which you want statistics.
  3. Click the Statistics button.
  4. Review the statistics. Descriptions are given in the following table.
    Field Description
    Change in response time A graph representation of the change in response time for each request. The x axis represents each request in time sequence. The y axis represents the time for each request on the x axis. The green background grid does not represent any unit of measure. If the number of requests since the Application Server was started exceeds the graph space, the graph shows only the most recent requests.
    Change in number of users A graph representation of the change in number of users for each request. The x axis represents each request in time sequence. The y axis represents the number of users for each request on the x axis. The green background grid does not represent any unit of measure. If the number of requests since the Application Server was started exceeds the graph space, the graph shows only the most recent requests.
    Registered Number of instances of the particular Virtual Server type, such as Image Server, in your site configuration, including those in use and those in the idle state.

    For descriptions of the other statistics, such as Waited for server and Invoked, see the STATS command section in Administering an ArcIMS site from the command line. While the other statistics may have a slightly different name when in the command line, the corresponding names are given in the help topic.

  5. Click 'x' in the upper right corner to close the Statistics window.


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