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So for a server with 1 CPU socket and 16 physical cores I need to by 16 core licenses. Licenses are sold as "2 core", so I need 8x "2 core" license? So when running on Proxmox PVE hypervisor the license enables me to run: Server Standard: 2 Windows Server VMs Datacenter: Unlimited number of...

Actually ~6 TB is the storage size in the host, that is available for VMs. So the worst case scenario is that the whole 6 TB size is used by various VMs with full disks. Also the 6 TB is on a ZFS volume, which is compressed by lz4. So compressing the backups may not drastically reduce the size.

Actually my plan is to store the vzdump backups via NFS on a backup NAS that is connected via 10G SFP+. But that way each backup will be a full backup: 6 VMs with a size of 1 TB each will need to transfer 6 TB for a backup. Even with a fast transfer of 300 MB/s this takes up to 6 hours.

Hi, I'd like to create a Salix OS container (Slackware based, https://salixos.org/). Therefore I need to create a container template first, but I have no idea how to do it. Actually I've thought I basically can just create a tar.gz of the root file system, add some description/config files and...

Hi, thanks for your reply. Also these two articles are worth a read: https://www.ixsystems.com/blog/zfs-pool-performance-2/ https://www.ixsystems.com/blog/zfs-pool-performance-1/

Here is a link comparing some ZFS RAID options: https://calomel.org/zfs_raid_speed_capacity.html Interesting numbers (without lz4 compression):

After seding the rpool/RPOOL/pve-1 dataset from another system to Proxmox system I probably also have to run the /etc/kernel/postinst.d/zz-pve-efiboot on the destination system to make it bootable again (update EFI partition with curretn kernel version).

Thanks! That indeeed helps.

Hi, is it possible to install Proxmox on an existing ZFS rpool by just deleting the rpool/RPOOL/pve-1 dataset and recreating it? I'm just wondering if I can reinstall Proxmox without losing VMs that are stored on the rpool, too. Thanks!

Hi, I've got a Proxmox installed on a ZFS RAID1. I've also noticed that the two root disks have 3 partitions: "BIOS boot", "EFI system" and "ZFS". I wonder what happens, when one of the root disks fails. For ZFS it should not be a problem, but what about booting the system? Are the first 2...

Hi, My understanding was, that all sync writes go to ZIL (SLOG) first. See: https://www.ixsystems.com/community/threads/some-insights-into-slog-zil-with-zfs-on-freenas.13633/ (especially: "Why sync writes matter, especially on a fileserver"). Also VMs can be configured in Proxmox to only do...

So instead of e.g. 6x 2 TB in RAIDz2 (= 8 TB space) you suggest 6x 2 TB in RAID10 (= 6 TB space) because performance of the pool for read/write is better then? When write cache is disabled for the VM disks, AFAIK a SLOG device (ZIL) should greatly improve performance. Probably better to use...

What are the reasons why I should use Epyc CPU instead of Threadripper? Threadripper is much lower price (I can even have a 12 core for less money than an Epyc 8 core) and has higher single core performance...

Is this fixed in kernel 5.0.15-1-pve? So there is no reason to not use AMD Epyc based servers with Proxmox?

It seems from a performance point of view one should have everything (Proxmox + VMs) on a single rpool, because then higher IOPS could be reached. Pool access is distributed across more disks then. Just let ZFS do it's magic and don't bother about seperated file systems. Seperate datasets are...

Oh, I guess what I actually mean is this: rpool mirror-0 ssd1-256GB ssd2-256GB vmpool raidz1-0 ssd3-2TB ssd4-2TB ssd5-2TB rpool -> Proxmox rootfs vmpool -> VM storage

Hi, I want to use an HPE Microserver for Proxmox. It can take 5 drives. I want Proxmox and my VMs on a ZFS pool with redundancy. In my understanding I could create a rpool like the following and use mirror-0 for Proxmox and raidz1-0 for the VMs: rpool mirror-0 ssd1-256GB ssd2-256GB...

Hi, what is the status of T520-SO-CR now? Does anybody know?

Also eine RDP-Sitzung ist ja etwas anderes als ein Terminalserver: Es geht ja gleichzeitig immer nur eine RDP-Verbindung zu Windows 10. Wenn ich jetzt eine VM mit Windows 10 betrieben möchte, um da ein paar Dienste laufen zu lassen, die keinen Windows Server benötigen. Ist das nun grundsätzlich...

Thanks for the info. Just for reference: I've also found those two links about borgbackup and VMs: https://github.com/borgbackup/borg/blob/master/docs/misc/create_chunker-params.txt https://mail.python.org/pipermail/borgbackup/2019q1/001280.html Basically it translates to you can use smaller...