These terms have a specific meaning when trying to determine a proper configuration for Isilon.  Workflow means what is the type of application that the customer will use to store or retrieve from Isilon. Examples include typical NAS File Shares or Streaming Backups, etc.  MetaData is the the 'data about the data'. For example, the actual file contains the stuff the customer would use and the metadata is the data about this file - Who owns it, when was it backed up, who as access to it, where is it on the file system, etc.  A treewalk is defined as a client looking up the MetaData on a range of files. A simple Windows Explorer or ls -la command will envoke a treewalk. Other applications include Backup applications.
I hear these terms over and over when talking about Isilon. What does these terms mean?
What does MetaData, Treewalk and Workflow mean?