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Sure, here it is: ~# zpool status pool: rpool state: ONLINE scan: scrub repaired 0B in 0 days 02:03:32 with 0 errors on Sun May 10 02:27:33 2020 config: NAME STATE READ WRITE CKSUM rpool ONLINE 0 0 0 mirror-0 ONLINE 0...

Well this looks interesting, but I`m a bit confused. You are creating an empty dataset with small block size 1m (why?), and then writing 0's to it. From what I can see it sits only on the special vdev which is great. I`m already using thin provision, that's not the case here. Space is not the...

Yes, that's what I`m asking the question about.

Well that is super sad.

Thank you, I've read about this already. I can't rebuild the rpool, unfortunately at this point. I was thinking to simply use mount to "/mnt/sdd" for example; is that not an option ? As I said, I would only store templates, etc.

I know this might be a stupid question, but it also my be a good question. I've done a mistake and setup a special device with 700+ GB in mirrored mode, the mistake being too much space dedicated for this. I have already a separate partition from this for SLOG, but that's unrelated to the...

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Thank you.

Hello, Has anyone succeeded in offering auto IPV6 from a range via dhcp to vm's ? I`m looking more specifically for using the IPV6 range that OVH offers. Any information is appreciated.

Sadly, this does not work.

This is a serious issue and multiple threads are posted without a reliable solution.

Thank you, I will remove L2ARC and setup this special device. Could you share your zfs status ? So I can see how your setup currently is please.

I am noticing that L2ARC is not really... as I expected. Cache hit ratio is however 30% (still io and cpu jumps crazy when you make a machine), but if I monitor the ZFS with netdata, I can see that "metadata" is the most active. So when you create a new VM for example, L2ARC is not really being...

Thanks for your input, I enabled LZ4 for compression and it is indeed noticeable. Regarding special device, is this like better or faster than l2arc ? Or is it used in conjuction ? As for L2ARC, yes I noticed the part about reboot.

Thank you. However I still dont understand how can ZFS work well if you set 128k block size, and your hdd handles 4k. Regarding the L2ARC, towards the end of my post and my reply you can see that is a must, and performance really increases.

But the HDD block size is 4k, so I set for the pool as well 4k. Why and how would it work optimally to double it ? Everywhere I read about this, it says to match the hardware block size.

Uhm, I know what arc_summary is... please read my post properly. Bafta.

VM testing, important observations: If you set disk cache to "writeback", it will not use L2ARC and the IO on PVE will jump like crazy even to 40% when booting the VM and the operation inside the VM is horrible. Setting the disk cache to "none" will make use of L2ARC, and the VM boot is quite...

Since there are many members here that have quite some experience and knowledge with ZFS, not the only that I`m trying to find the best/optimal setup for my ZFS setup; but also want to have some tests and information in 1 place rather than scattered around in different threads, posts and...

That worked, thanks.