StorMagic SvSAN witness requirements compared to VMware VSAN 2-node witness requirements

This article is intended for administrators wishing to understand the witness requirements of StorMagic SvSAN and compare it to other technologies.

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Resolution/Information

StorMagic SvSAN 2-node Witness requirements

- 1:1000 sharable
- 1x vCPU
- 1GB RAM
- 1GB VMDK (2x 512MB)
- 3000ms latency
- 9Kbps per mirror

VMware VSAN 2-node Witness requirements

- 1:64 (maximum sharable)
- 6x vCPUs
- 32GB RAM
- 1.05TB
-- 1x 12GB VMDK
-- 1x 10GB VMDK
-- 3x 350GB VMDK
- <500ms latency
- 1.5Mbps per site

1.5Mbps * 64 sites = 96Mbps from the main datacenter hosting the witness.  This location will presumably be hosting other services such as websites, backup etc, and have just lost ~100Mbps to VSAN

9Kbps * 1000 sites = 9Mbps

Using an existing StorMagic gas station use case as an example, they have 2166 node license keys = 1,083 sites @ 2-nodes per site

So working with 1000 sites for a round number

See Also

https://stormagic.com/manual/