Brocade Fabric OS Encryption Administrator’s Guide Supporting RSA Data Protection Manager (DPM) Environments (Supporting Fabric OS v7.2.0) - Manual (Page 262)

242 Fabric OS Encryption Administrator’s Guide (DPM)
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Recommendations for Initiator Fan-Ins
5
FIGURE 107 Fan-in ratios with performance license installed
The fan-in ratio for a target can be higher depending on the maximum bandwidth accepted by the
target. If the I/O throughput across all initiator ports accessing the target port is well balanced, it is
recommended that the maximum fan-in ratio be kept to 8 Initiator ports to 1 target port for optimal
performance. Note that this recommendation holds for initiators running at 4 Gbps or less. If a mix
of 8 Gbps and other 4 Gbps or less initiator is used, then the maximum fan-in will depend on the
maximum sustained bandwidth these initiators would be pushing together over the link to the
same target port and across all the target ports hosted on a given encryption engine.
NOTE
If the performance license is not installed, 48 Gbps of full duplex encryption bandwidth is available
on the encryption engine, Each of the six encryption blocks will use two ports instead of four,
reducing the fan-in ratio by a factor of two.