Avid Technology Unity LANserver EX3 Setup Manual page 94

Appendix B Avid Performance Meter
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The Avid Performance Meter supports testing that focuses on
Reads vs Writes
Reads, Writes, or that alternates between Reads and Writes.
Select one of the test modes:
t Writes Only — The utility Writes test data files and
measures the throughput obtained during Write operations.
t Reads Only — The utility Reads test data files and measures
the throughput obtained during Read operations.
n
t Reads and Writes — The utility alternates between Read
and Write tests. Approximately half of the test duration is
allocated to reading, and the other half is allocated to writing.
Transfer Size This option controls the amount of data the test utility attempts to
Read or Write during a single I/O.
Transfer Rate The utility can attempt to perform I/O at a variety of fixed
transfer rates. This is useful for simulating the behavior of
utilities that have a known data rate.
A special Unlimited transfer rate setting is also available. When
you select the Unlimited transfer rate, the Avid Performance
Meter performs I/O operations as fast as possible while being
affected by all aspects of the total system being exercised.
Max File Size This option controls the maximum size of test data files created
for Reads or Writes. This option might affect throughput
measurements. For example, at any given data rate, a smaller file
is opened and closed more often than a larger file, creating more
overhead.
One or more test data files are written as sample data for
testing; however, the Writes required to set up the test are
not included in the throughput measurements.