BMC AMI Unload can affect your use of servers as follows:
If you unload from an image copy using the COPYDDN keyword, the image copy data set is allocated and read in the primary job, and servers cannot read the image copy data set. This restriction does not apply if you use the COPYDSN keyword or the OUTPUT command.
BMC AMI Unload uses servers when no output DD statements are defined in the primary job (subject to the preceding restriction). In these cases, the XULDDYNM automation control point or OUTPUT command dynamically names and allocates the unload data set.
If the output DD statement exists in the primary job and the unload statement contains ORDER BY, the server can perform the read phase (subject to the first restriction) and BMC AMI Unload performs the output phase in the primary job in which the output data set is allocated.