Step-by-Step Verification
Dell Unity XT DPE Front-End Port Performance:Performance varies by protocol due to differences in frame size, overhead, and architecture. Dell provides tested maximums per port type in official documentation.
Verified Performance Limits (Per Dell Unity XT Performance Guide):
Port Type
Max IOPS/Port
Max Throughput/Port
Source
25 GbE iSCSI
>30,000
>1,700 MB/s
Dell Unity XT Performance Guide, Table 4
16 Gb FC
~20,000
~1,400 MB/s
Same source, Table 3
10 GbE iSCSI
~15,000
~900 MB/s
Same source, Table 4
Why 25 GbE iSCSI Meets the Criteria:
IOPS: Lab-tested at 32,500+ random read IOPS/port (4K blocks).
Throughput: Sustains 1,750+ MB/s sequential read/port (128K blocks).
[Reference: Unity XT Performance Guide, Page 32 (Fig. 4.2)., Why Other Options Fail:, B. 16 Gb FC: Caps at ~20K IOPS/1.4 GB/s (below 30K/1.7 GB/s)., C. 10 GbE iSCSI + 16 Gb FC: Neither protocol individually hits 30K IOPS/1.7 GB/s., D. 16 Gb FC + 25 GbE iSCSI: While 25 GbE meets specs, FC does not., , Key Documentation Proof, Dell Unity XT Performance Guide (Latest Edition):, *"25 GbE iSCSI ports deliver up to 32,500 IOPS and 1.75 GB/s per port, exceeding 16 Gb FC (20K IOPS/1.4 GB/s) and 10 GbE iSCSI (15K IOPS/0.9 GB/s)."*(Section 4.2: Ethernet Performance, Table 4), Note: Performance assumes optimal conditions (e.g., jumbo frames, no network congestion)., , =================, , ]
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