Please show your DDR memory size!

Yes, I’ve had mixed results changing processor cores, ram, and layout with my Windows VMs running in XCP-NG. It just a don’t do it thing now. I was very surprised when one VM gave my problems with just a RAM increase.

Back to the original, a have some older CORE servers running 16GB, and some newer CORE/SCALE mixes with 32GB. I’m planning out some new servers to replace old servers and planning on 64GB (2x32).

My LAB has 96GB of DDR3 running Scale, but the ZFS cache never seems to fill past 64GB leaving a bunch of free RAM. All sockets are full in my lab server, so getting the best interleave possible (or whatever HP calls there magic memory stuff).

Even the best hardware starts to fail after 10-15 years.

Here is a good example

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Dang! Now you got me thinking…maybe i should upgrade my motherboard/CPU/memory and maybe also my HDD’s. Maybe first the SAS HDD’s because they are old old…Maybe replace them by SSD’s…i have some choices to make.

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Replacing old HDDs by SSDs, or even by modern, much bigger, HDDs means a very different class of storage and may go with a different pool layout. So if you go this road, that’s a whole new exercise in server design.

True. Since i am not in urgent need of much storage space, i figure replacing the current 2Tb SAS drives with new 4Tb SAS drives would be the easiest way to go for now. I could swap them over on the fly. It is not possible to shut down my TrueNAS for days as i use Nextcloud for my business. This is also one of the reasons that i am not changing over to Scale as this would mean installing Nextcloud from scratch with too much downtime. The only way that will ever work for me is building an entire new server first and then transfer all relevant files from the old server to the new one. Too much hassle for now. Maybe somewhere next year after i closed the books for 2024.

Which is why I advocate building a new primary, and demoting the old one to a backup :slight_smile:

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Agreed. I’d likely redo the pool and reduce the number of spinners by 2x by choosing higher-capacity drives, and go to Z2. That would cut drives in half and reduce my power needs by 30w without major changes.


:sunglasses:

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One of those rare systems where the entire pool fits into the ARC. :crown:

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