That's a very decent setup. What are you running on it?
Hmm, I guess the most IOPs and latency cut will come from a storage protocol use. I mean, with 10GbE and iSCSI or NFS, you might not feel the benefits of NVMe. Especially in terms of latency. And as far as i know, there is no NVMe-oF support yet.
Very nice and clean setup. Looks great!
Looks like a really cool setup! Nicely done.
I would look into something of HP G9 or Dell R730/R630 range. These will be more power-efficient and you should find something within that price.
That's a nice and clean setup. Well done!
Option 1: VMware vSAN (plus witness on some other machine): https://core.vmware.com/resource/vsan-2-node-cluster-guide or Starwinds vSAN: https://www.starwindsoftware.com/vsan that has a free option if I'm not mistaken with just two R630s and decommission R620. Lower power consumption and you get proper HA.
Option 2: Use R620 as a TrueNAS system providing storage over NFS or iSCSI to ESXi cluster. That R620, however, becomes a single point of failure and consumes more power.
Cool rack! The setup looks very neat and clean. Definitely a big step forward. Nicely done!
It should take up to 138GB for boot but you can also change the settings during the installation: https://kb.vmware.com/s/article/81166
A lot really. Mostly related to the projects we do for our customers at work like disaster recovery with vSphere Replication, Hyper-V Replica, Zerto, HA clusters with XCP-NG, VMware vSAN, Starwinds vSAN and so on. Also, Zabbix, TrueNAS, CheckMK.
For a starting homelab, I would look into Optiplex. Would be more powerful than a laptop (most likely). As mentioned, i5 or it or higher.
I think that should be possible but I would prefer the second option mentioned - Hyper-V role with a NAS OS Vm and drives passed through to it. Then collect in RAID inside a VM.