VSAN All-Flash Stretched Cluster Testing – 1Gbps vs 10Gbps Network

Both hosts disk group consists of

1) Flash Tier: 240GB SSD

2) Capacity Tier: 1TB Samsung 850EVO SSD

Testing VM running on the following sites:

**Preferred Site – 1Gbps vs 10Gbps (MB/s)

1Gbps All-Flash VSAN - Preferred Site - MBps10Gbps All-Flash VSAN - Preferred Site - MBps**

**Preferred Site – 1Gbps vs 10Gbps (IOPS)

1Gbps All-Flash VSAN - Preferred Site - IOPS10Gbps All-Flash VSAN - Preferred Site - IOPS**

**Secondary Site – 1Gbps vs 10Gbps (MB/s)

1Gbps All-Flash VSAN - Secondary Site - MBps10Gbps All-Flash VSAN - Secondary Site - MBps**

**Secondary Site – 1Gbps vs 10Gbps (IOPS)

1Gbps All-Flash VSAN - Secondary Site - IOPS10Gbps All-Flash VSAN - Secondary Site - IOPS**

Conclusion

In an All-Flash VSAN environment, 1Gbps network is clearly being the bottleneck. With the 10Gbps network, I could observe average about 5X improvements in terms of transfer rates and IOPS.