Migration prerequisites

Before you migrate your old version of WebSphere Application Server, verify that you meet these requirements:

• Minimum version of source WebSphere Application Server required

  • If you are migrating from Version 3.5.x, be at Version 3.5.6 or higher.
  • If you are migrating from Version 4.0.x, be at Version 4.0.4 or higher.
  • If you are migrating from WebSphere Application Server Express Version 5.0.x, be at Version 5.0.2 or higher. The Express version must match the version of WebSphere Application Server (Base) or Network Deployment that you are migrating to.

  To determine the current level of WebSphere Application Server installed on your system, perform these steps:

  Version 3.5.x/Version 4.0.x:

  1. Enter this command on the OS/400 command line:

     WRKLNK '/QIBM/ProdData/product_dir/properties/com/ibm/websphere/product.xml'

     where product_dir is:
     • WebASAdv for Version 3.5.x
     • WebASAdv4 for Version 4.0.x Advanced Edition

     • WebASAEs4 for Version 4.0.x Advanced Single Server Edition

  2. Specify option 5 (Display) next to the product.xml file to view the contents. The number within the <version> tags show the current version you have installed.

  Version 5:

  1. Enter this command on the OS/400 command line:

     WRKLNK '/QIBM/ProdData/product_dir/properties/version/product_file

     where product_dir is:
     • WebASE/ASE5 for Version 5.0.x Express
     • WebAS5/Base for Version 5.0.x (Base)
     • WebAS5/ND for Version 5.0.x Network Deployment

     where product_file is:

     • BASE.product for Version 5.0.x Express
     • BASE.product for Version 5.0.x (Base)

     • ND.product for Version 5.0.x Network Deployment

  2. Specify option 5 (Display) next to the product file to view the contents. The number within the <version> tags show the current version you have installed.

  If you do not meet the minimum version, obtain the latest group PTF. See WebSphere Application Server PTFs for iSeries for information on the correct group PTF for your OS/400 release level and WebSphere Application Server Version 3.x product, WebSphere Application Server Version 4.x product, or WebSphere Application Server Express V5.0.x product.

• WebSphere Application Server Version 5 must be installed.
  Follow the instructions in the Installation topic for more information. WebSphere Application Server Version 5 (Base) and optionally Network Deployment must be installed on the same iSeries server as the Version 3.5, Version 4, or Version 5 Express product to be migrated. Network Deployment needs to be installed if you are migrating to that edition.

• *ALLOBJ authority is required.
  When you call the WasPreUpgrade and WasPostUpgrade migration tools, your user profile must have *ALLOBJ authority.