Brocade Flow Vision Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 88)

FIGURE 17 SCSI command tracking
Tracking latency between a host and all connected targets
In order to smooth out application performance, you may want to track the latency of SCSI Initiator-
Target pairs so that you can load balance them.
The following examples capture all the SCSI commands and their status frames initiated by device H1
ingressing through port F1, as illustrated by the following figure. This will capture all the SCSI
commands and status frames that can be viewed using Flow Vision. You can then deduce the latency
between a SCSI command and its respective status frame for a CPU-mirrored flow at the host port by
viewing the output of the Flow Mirror flow using the flow --show command, and for a local mirrored
flow by viewing the mirrored frame data.
FIGURE 18 SCSI command tracking for latency
NOTE
In both of the following examples, specifying -frametype scsicmdsts implicitly makes the flow capture
bidirectional.
Tracking latency between a host and all connected targets
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