Regarding the issue of TrueNAS Scale memory consumption

[wanabekeats]

I apologize for disturbing everyone .
I have a server running PVE with a configuration of 12400H processor and 128GB DDR4 memory. I'm looking to create two RAIDZ2 storage pools within TrueNAS Scale on this system, consisting of 10x8TB and 7x16TB drives, respectively. I'm wondering if the 128GB of memory is sufficient for this purpose. Due to the need to run other virtual machines on PVE, I can only allocate 80GB to 90GB of Truenas scale . Based on information from various sources, I understand that TrueNAS recommends 1GB of memory per 1TB of storage, which has led to the aforementioned concerns.
Thank you.

 

[sretalla]

That recommendation is a rule of thumb and really applies in earnest to the "working set" in all reality.

Hopefully you're attaching your disks the right way:

"Absolutely must virtualize TrueNAS!" ... a guide to not completely losing your data.

[---- 2018/02/27: This is still as relevant as ever. As PCIe-Passthru has matured, fewer problems are reported. I've updated some specific things known to be problematic ----] [---- 2014/12/24: Note, there is another post discussing how to deploy a small FreeNAS VM instance for basic file...

www.truenas.com

 

[danb35]

Do you need to use SCALE? Particularly if you're already in a virtualized environment? I ask because CORE's memory management seems to be more efficient, in that it will actually use all the RAM you give it. My SCALE system sits with about 30 GB free, which is wasteful.

 

[wanabekeats]

That recommendation is a rule of thumb and really applies in earnest to the "working set" in all reality.

Hopefully you're attaching your disks the right way:

"Absolutely must virtualize TrueNAS!" ... a guide to not completely losing your data.

[---- 2018/02/27: This is still as relevant as ever. As PCIe-Passthru has matured, fewer problems are reported. I've updated some specific things known to be problematic ----] [---- 2014/12/24: Note, there is another post discussing how to deploy a small FreeNAS VM instance for basic file...

www.truenas.com

Hey guys, much thanks for your help.
Actually I already solve the attaching disk problem,using pcie pass-through . The RAIDZ2 pool has 5x8T HC550 and it works goods.
So the most important problem is memory.
May be I should use L2ARC...

 

[wanabekeats]

Do you need to use SCALE? Particularly if you're already in a virtualized environment? I ask because CORE's memory management seems to be more efficient, in that it will actually use all the RAM you give it. My SCALE system sits with about 30 GB free, which is wasteful.

Hey guys, much thanks for your help.
I don't know if I can handle FreeBSD well