Hi all,
I have a small Hyper-V 2012 R2 hyperconvergent cluster with Starwind Virtual SAN Free storage.
Briefly about each node config:
2xXeon 6cores 2.1GHz
32GB RAM
2x1Gb builtin NICs
2x1Gb addon NICs
2x1TB SATA 7200 in mirror volume via Storage Spaces for data
1GB L1 cache in StarWind flat fixed size(300GB) HA device, placed on this mirror volume.
Jumbo on.
Two builtin NICs used for cluster and clients, one addon NIC - iSCSI and SW sync, second - SW sync. SW heartbeat - on all four NICs.
It works. I have several VM running on it. Of course storage subsystem is expectedly slow.
I'm wondering - if I want to speed up the storage, then what is the best way to spend money: to replace an addon NIC with 10Gb one or replace a mirror with single enterprise SSD?
Currently storage shows such results(diskspd -c500M -w100 -t1 -o1 -b64K -Su ...):
1. SS Mirror drive itself: 110 MB/sec
2. C:\ClusterStorage created using SW HA device: 25 MB/sec
3. Inside of one of 2012 R2 VM: 20 MB/sec
My opinion: replacing NIC with 10Gb will significantly rise 2) and 3) speeds.
Am I right?
How much can acceleration be?
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