IBM WAVV 2004 - Manual (Page 3)

VSE/ESA 2.6/2.7
VSAM Redirector
The VSAM Redirector is a new VSE/ESA connector, introduced with VSE/ESA
2.6. The VSAM Redirector allows you to redirect all requests to a certain VSAM
file into any other file system or database on any other (Java-enabled) platform.
VSE/ESA is the client, while the server part runs on any other Java-enabled
platform like Windows.
For example you could use the VSAM Redirector to synchronize a VSAM file with
a DB2 database running on a Windows. By using the VSAM Redirector your
existing VSAM programs doesn't require any revisions.
The VSAM Redirector makes use of a so called VSAM Data Access Exit (VDA).
This exit intercepts all VSAM requests. The exit gets control at OPEN, CLOSE,
and for all data requests (GET, PUT, INSERT,...).
A configuration table is used to define which VSAM files are being "redirected".
The VSAM Redirector Client on VSE forwards all requests against a redirected file
to the VSAM Redirector Server which then handles the request.
The VSAM Redirector Server is a Java application. It can run on any Java
enabled platform.