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Operating Systems: AIX, HP-UX, Linux, Solaris, Windows, z/OS

 

Configure application placement for cells that share the same nodes


When two cells share the same workstation, such as the same physical machine, the same blade in a blade center, and so on, overuse of memory can occur. You can configure a custom property so that the application placement controller does not overuse resources on the shared hosts.

 

Before you begin

Configure the cells and create the nodes within each cell.

 

About this task

For application placement controller to properly use resources on the cells that share the same nodes, you can define the OverlappingCells custom property in each cell to give information about the hosts that are sharing the same node.

For example, if you have a cell_1 cell and a cell_2 cell, you can create this custom property in cell_1 using information about cell_2, and create the custom property in cell_2 using information about cell_1.

 

Procedure

  1. Enabling communication between cells that have security enabled.

    If your cells have security enabled, such as LDAP administration security, set up communication between the cells.

  2. Optional: If you do not want the password for the deployment manager cells to display as plain text in the administrative console, you can encode the passwords for each of your cells. To encode a password, use the encodePassword script. The script is in the install_root\bin directory. To run the script, use the following command: 
    ./encodePassword.sh my_password
    The encoded password is displayed. You can use this encoded password when you define the custom property value.

  3. Set the OverlappingCells custom property in each cell.

    1. In the administrative console, click Operational policies > Autonomic managers > Application placement controller > Custom properties > New.

    2. In the Name, type OverlappingCells.

    3. Enter the custom property value. Use the following format, where each one of these variables is referring to the information for the other cell: 
      user_name:password@dmgr_host:port.SOAP

      For example, you might enter:user1:user1pwd@mydmgrhost.mycompany.com:8879.SOAP in the value field. .

      If you are connecting three or more cells, you might enter multiple values by separating the values with a comma, for example: user1:user1pwd@mydmgrhost.mycompany.com:8879.SOAP, user2:user2pwd@mydmgrhost2.mycompany.com:8879.SOAP

  4. Save and synchronize your changes.

 

Results

When the custom property is configured in two or more cells, the application placement controller for each cell contacts the application placement controllers in the other cells to ensure that only one application placement controller is running. By having one application placement controller among all the connected cells running at a single point in time, the application placement controllers do not try to manipulate the same node.

 

Related concepts


Overview of application placement

 

Related tasks


Enabling communication between cells that have security enabled

 

Related reference


Application placement custom properties