SESSION TASK
A session is a set of instructions that tells the Power Center Server how and when to move data from sources to targets.
To run a session, we must first create a workflow to contain the Session task.
We can run as many sessions in a workflow as we need. We can run the Session tasks sequentially or concurrently, depending on our needs.
The Power Center Server creates several files and in-memory caches depending on the transformations and options used in the session.
EMAIL TASK
The Workflow Manager provides an Email task that allows us to send email during a workflow.
Created by Administrator usually and we just drag and use it in our mapping.
COMMAND TASK
The Command task allows us to specify one or more shell commands in UNIX or DOS commands in Windows to run during the workflow.
For example, we can specify shell commands in the Command task to delete reject files, copy a file, or archive target files.
