PEX4M2E1 + NVMe SSD cache disk or optane

[skunkworker]

I've been looking into improving my cache disk, right now I have a 500gb mx300 ssd over SATA3 but I am wanting to improve the read/write performance because I am running a lot of docker containers off of it and it seems to be a bottleneck at times with large amounts of dating coming and going.

 

Would it be possible to use the Startech NVMe PCIe3 x4 adapter with an NVMe based ssd as a cache disk? Or should I go for something with higher random IOPS?

Thanks,

 

Below are the two products I'm looking at.

https://smile.amazon.com/StarTech-com-PEX4M2E1-M-2-Adapter-Profile/dp/B01FU9JS94?sa-no-redirect=1&th=1

 

https://smile.amazon.com/Samsung-970-EVO-500GB-MZ-V7E500BW/dp/B07BN4NJ2J/ref=pd_lpo_vtph_147_bs_tr_t_1?_encoding=UTF8&psc=1&refRID=TT8EHBTFF5N499K8FARJ

 

P.S. I've also looked into the Intel Optane 900P 280gb x4 as a possible cache device, because it's random reads/writes are 8x than normal SSDs.

https://smile.amazon.com/Intel-Optane-900P-280GB-XPoint/dp/B0772XB3MY?sa-no-redirect=1

Edited May 28, 2018 by skunkworker

[Rich Minear]

I'm wondering if you every received an answer for this?  I'm looking at adding a cache drive to my setup also, and I'm out of SSD ports.  That controller and drive are what I found.  

 

Are you using them?