SSD passthrough / Cache ect.

[unknown]

Hello!

 

I wanna improve my performance on my Vms and im still testing.

I think i have bad performances on my SSD's. Windows Task Manager often shows 100% on my Devices...

 

I don't know how much cache do i need for good perforance. I only have 128Gb SSD. Is this enough?

More Cache Memory = more VM speed ? I dont really know how importanten the cache is....?

 

Atm i have:

 

Samsung 512GB PRO

Samsung 500Gb Evo

Samsung 250Gb Evo

Crucial 120Gb

 

At the moment im using Vdisks with both 500Gb SSD's are in Pool.and 120 Gb SSD for Cache.

What are your experience ? Are you guys using vdisk or passing through the SSD.

 

 

 

 

 

[testdasi]

1. What is your parity drive? If there's no parity drive then there's no need to have a separate cache SSD.

 

2. A full spec probably helps to have a full idea of how things fit together

 

3. How "slow" is your VM? Why do you think it's not fast enough?

 

4. Be prepared someone will tell you SSD array is not supported.

[aptalca]

SSD array is not supported

 

 

 

But some folks on the forum are using it :-)

 

[JorgeB]

In my experience Samsung SSDs have terrible write performance when using them without trim, by terrible I mean <50MB/s writes, array devices can't be trimmed, suggest you try running your VMs from cache or unassigned SSDs.