DELL PowerStore 1000T and S4112 – Jumbo Frames (MTU) performance impact with VMware vSphere 7
its few days that i have some new stuff in our lab so i decided to perform some performance impact of Jumbo Frames on the SAN 10 GbE network. For the test i used the ATTO Disk BenchMark 4.01.0f1
The lab setup:
- Fujitsu Primergy RX2540 M4 with 2x Intel(R) X722 for 10GbE SFP+
- VMware ESXi, 7.0.3, 19193900
- 2x DELL S4112
- firmware 10.5.2.3
- VLT enabled on the 40 GbE
- Portchannel on the uplinks to SAN
- DELL PowerStore 1000T
- 2.1.1.1 (Release, Build 1690550, 2022-05-16 22:01:28, Retail)
- 6 x 1.9 TB NVMe SSD
- Virtual Machine
- Guest OS – Windows Server 2022
- 8 vCPU
- 12 GB RAM
- 100 GB Thick Disk on the LSI Logic SAS controller
The diagram of lab setup:
PowerStore cabling diagram
Default MTU size 1500
- Latency: 0,28 ms
- IOPS: 9177 IO/s
- Bandwidth: 1027.7 MB/s
Changed MTU to 9000
- Changed MTU in the Cluster MTU in the PowerStore to 9000
- Changed Network Storage MTU in the PowerStore to 9000
- Changed MTU to 9216 on the S4112 switches
- vlan
- port-channels
- interfaces
- Changed MTU on the VMkernel port to 9000
- Changed MTU on the vSwitch to 9000
The Performance after change MTU
- Latency: 0,30 ms
- IOPS: 9973 IO/s
- Bandwidth: 1105.1 MB/s
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