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Chapter 4
sitive to the transaction logging I/O response time; you must ensure that
the link round-trip latency is kept to a minimum.
We consider, in Microsoft Exchange deployments, that a round-trip of
less than 10 ms is satisfactory for medium workloads (user, quantity of
users). But based on your business requirements and on the workload pat-
tern, that requirement may either be ten times higher or lower. To decide,
you have no other option than to carry out testing using some of
Microsoft’s test tools, such as LoadSim, ESP, or Jetstress, that we discuss
later in this book. Microsoft has a comprehensive Web site ...