2/16/09

Websphere Migration

Migration
This term has many definitions and a broad scope. In this document, the meaning of migration is limited to the actions associated with moving Java™ 2 Enterprise Edition (J2EE™) applications (EARs) and Application Server configuration data (such as resources and security settings) from a previous version of Application Server to V6.

WASPreUpgrade (tool)
Refers to the first step of the two-step migration process. The tool associated with this step will extract information from the previous version of Application Server and store it in a backup directory. This tool can be run by itself from the command line or as part of the migration wizard.

WASPostUpgrade (tool)
Refers to the second step of the two-step migration process. The tool associated with this step will take information from a directory created by the WASPreUpgrade tool and import it into a V6 profile. This tool can be run by itself from the command line or as part of the migration wizard.

Backup directory
Refers to a directory structure created by the WASPreUpgrade tool that contains all the information necessary for migration from the previous version of Application Server.

Migration wizard
Refers to the graphical user interface (GUI) that interactively performs the migration. This GUI tool performs the WASPreUpgrade and WASPostUpgrade steps.

FirstSteps (tool)
Tool provided in V6 to simplify and organize many actions that customers may wish to perform with a newly installed system. It can be found in the firststeps directory under each profile and can be used to launch the migration wizard.

Profiles
This concept expands on the idea of "instances" in V5. It refers to the collection of all the configuration data for an Application Server in V6. Application Server V6 provides for multiple profiles with only one install of the binaries. A single profile is required as the destination for the data being migrated from a previous version. (See Installing Application Server V6.)

Cell
Refers to the collection of one or more nodes controlled by a single deployment manager.

Federate or Federated
Refers to the action of adding a node to a cell; also refers to a node that is part of a cell. This term has been expanded to also refer to a node in a multi-node V4 domain.

Deployment manager profile (dmgr profile)
This profile acts as the deployment manager, and is the destination for the migration of the V5 deployment manager, and as a new deployment manager for V4 migrations. There can be only one deployment manager profile for each cell.

Standalone or Application Server profile
Refers to a profile that is analogous to a single node install of Application Server. This type of profile is the destination for the migrations of a node either in a cell or not in a cell.

Clusters
This term replaces the idea of ServerGroups from V4. Clusters are sets of servers that are used for distributing workload within a cell.


A quick guide for migrating to IBM WebSphere Application Server V6

1 comment:

Ajay said...

Amazing work my friend. Keep it up.