The modes of deploymnet are: Stage,No-stage and External

STAGE: The Administration Server first copies the

deployment unit source files to the staging directories of

target servers specified by the Staging Directory Name

attribute.

The target servers then deploy using their local copy of

the

NOSTAGE: The Administration Server does not copy

deployment unit files. Instead, all servers deploy using

the same physical copy of the deployment files, which must

be directly accessible by the Administration Server and

target servers.

With nostage deployments of exploded archive directories,

WebLogic Server automatically detects changes to a

deployment's JSPs or Servlets and refreshes the deployment.

(This behavior can be disabled if necessary.)

EXTERNAL_stage: The Administration Server does not copy

deployment files. Instead, the Administrator must ensure

that deployment files are distributed to the correct

staging directory location before deployment (for example,

by manually copying files prior to deployment).

With external_stage deployments, the Administration Server

requires a copy of the deployment files for validation

purposes. Copies of the deployment files that reside in

target servers' staging directories are not validated

before deployment.