Qlogic Storage Networking (Unified Fabric Pilot Installation Manual page 44

5–Validation Methods for DCB and FCoE
Validation Step 3—FCoE Function and I/O Tests
Similar to previous test results, the captured FCoE traces listed in
no FCoE frame errors.
Table 5-1. I/O Performance Comparison Among FCoE Storage Network Scenarios
Throughput
(MBps /
Topology
Percent of
Option
Maximum
Bandwidth)
Direct
Attach
641 / 64%
FCoE
Storage
Direct
Attach
390 / 98%
Fibre
Channel
Storage
Fibre
Channel
390 / 98%
SAN
Storage
The results show that the direct attached Fibre Channel storage topology and
Fibre Channel SAN storage topology share similar I/O performance. The
throughput is nearly 100 percent of total available bandwidth. These results prove
that the stateless FCoE overhead does not impact Fibre Channel SAN
performance.
The direct FCoE storage topology has higher available bandwidth (10GbE link),
so the throughput is higher at 641MBps. However, the bandwidth usage is only 64
percent of the total available bandwidth. The bandwidth may have been limited by
the storage device in this case, whereas it was limited by the network in the other
two cases. This conclusion is based on the Queue Depth and Data Size traffic
parameters.
No data integrity errors were detected by the MLTT tool in the three tests.
5-14
SCSI I/O
Statistics
IOPS Average
Average
(IO/s) Read
Completion
Data
Time (ms)
Time
1168 5.28
703 1.28
736 1.28
Exchange Statistics
Completion Byte/
Rate Exchange
(per sec)
5.73 1168 524,288
5.62 704 524,288
5.59 736 524,288
Table 5-1 show
Pending Exchange
Pending Oldest
I/O Pending
(per sec) Read
(ms)
8 0.39
1 9.37
5 4.84
51031-00 A