Draft Document for Review February 7, 2020 3:15 pm 8464axExamples.fm IBM TS7700 parameter examples G This appendix explains two different parameter scenarios. The first parameter example shows  how different definitions and parameters interact. The second example set shows how the  tape partitions can be used to influence the configuration and performance. Important: These examples are not leading practic es or recommended configurations to  be adopted . The purpose of this appendix is to demonstrate how some operational choices  or parameter interactions can affect your TS7700 subsystem by walking you through some  options and settings, and evaluating the effects of different settings or choices. This appendix describes four examples of how consistency policies work and how certain  parameters influence the behavior of the configurations. This appendix explains the usage of  the following objects: The examples are meant as a drill to exercise some setting options and evaluate the effects  on the grid. They are only hypothetical implementations, for the sake of the settings exercise.  Although the distance between data centers has an influence on latency, the distance has no  influence on the function.  These examples show no Time Delay Replication copy policy. A Time Delay Replication copy  is only made after a certain amount of time has expired (after creation / after last access).  While the timer is not elapsed, this type of copy behaves regarding the dependencies to the  parameter mentioned in these examples like a  No copy . When the timer is elapsed, the copy  behaves like a copy produced in  Deferred mode copy . Therefore, no specific examples need  to be added. This appendix includes the following sections: GLYPH<SM590000> Different Copy Consistency Policies GLYPH<SM590000> Scratch allocation assistance (SAA) and device allocation assistance (DAA)  GLYPH<SM590000> Retain Copy Mode GLYPH<SM590000> Override settings GLYPH<SM590000> Synchronous deferred on Write Failure Option GLYPH<SM590000> Cluster family GLYPH<SM590000> “General example setup” on page 888 GLYPH<SM590000> “General example setup for Tape partitions” on page 903 ' Copyright IBM Corp. 2 020. All rights reserved. 887