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already thinking maybe I should double the RAM to 512GB for 168TB of ZFS RAID-Z2?

Hi All, We're looking to purchase a server new, explicitly for PBS. Which is a bit of a big commitment for us. So I thought I'd run the specs by everyone here in case I'm missing anything. . . SUPERMICRO AS-2124US-TNRP Server/Chassis 2 x 16 Core AMD EPYC 7313 Gen 3 Processor 256GB DDR4-3200...

I think the "latest only" checkbox in the properties of the tape backup job is close to what you're looking for. With that checked, if I write to tape on March 1, it's going to grab only the lastest disk-to-disk snapshot for each VM and write it to tape (as a complete backup, generated from...

Yep! Thanks!

Hi All, If there is a means of already doing this, I apologize and would appreciate guidance. Having said that. . . what I'd love to see is a feature where a proxmox node could be set to "maintenance mode" and HA would then migrate all of its VMs off of it (while we watch) and the VMs would...

I think the term I should be using is "referencing". . . So to translate my unfortunate/inappropriate use of "downstream". . . what I meant is that snapshots that are taken later and reference the initial snapshot are "downstream" of that initial snapshot. But, I think you already answered my...

Hi Dominik, I must humbly apologize. My questions have (in my mind!) been about bit rot/corruption of the PBS datastore itself rather than on the VM being backed up. I laid out all the context about the pbs datastore but then actually made my question unclear! In fact, I stated it downright...

Thank you Dominik! Understood! That really just leaves "Question 3" in my above post. . . Question 3: Any snapshots "downstream" of that now corrupted "snapshot" are then affected? What happens to them? Will PBS allow file-level restores from those snapshots "around" the affected/corrupt...

Thank you for the replies. Since confidence in a backup solution is paramount, I hope nobody minds if I follow up with some further, more detailed questions. Thankfully, our pbs datastore is on raidz2 but for the purposes of this discussion, let's pretend that it isn't! Okay, so. . ...

Hi All, Sorry if my meager googling and forum searching skills have let us all down. . . but would someone please answer: What should we expect to happen if/when "bit rot" takes place and a verify job detects it on a backup/snapshot generated long ago? In other words, what is the by-design...

Hi All, I'm just curious. Certainly not going to try it. But what happens (ie., what could/would go wrong) if we were to join a new PVE node to our PVE cluster (w/ ceph) when the new node is not yet licensed. The other eight nodes pre-existing on the cluster are licensed and on the...

Thank you for that awesome reply! It is very informative and we're very appreciative that dev time will be put into the noted behavior! Meanwhile, our tape job has finished and we can now nuke our datastore and begin testing/experimenting.

Is there no role for a CPU's sha exenstions (or lack thereof) in determining what the verification performance could be? I was hopeful that a CPU+motherboard upgrade to our pbs server might improve verification job duration. But since we're HDD-based (rather than SSD), is the consensus that...

We have two 11TB VMs (among many other smaller VMs) backing up to a PBS server. Admittedly, the hardware PBS is running on is not ideal. It's HDD-based. Twenty-four Seagate ST10000NM0086 10TB SATA drives operating in a RAIDZ2 datastore. There are no SSD-based zfs "special devices" and we...

Hi! Thank you for the info about proxmox-backup-manager. Regarding our backup speed, it is generally hovering around 150 MB/s. Dipping a bit at times and sometimes peaking as high as 250 MB/s for a few task log entries. Here's a snippet chosen at random from our (now finished) backup job...

Nevermind! Apparently, when PBS begins the process of writing a larger snapshot to tape (in this case, about 10TB), it takes some time to gather itself together before writing. I went back and noted this same behavior overnight when it wrote another 10TB snapshot. But once it's done with...

Hi All, Is there some CLI or alternate means of viewing the task output of a running tape backup task? I ask because we are currently in the midst of a 25-30 TB backup to LTO-8 tape (on a Quantum SuperLoader 3, HH drive) and at about 20 hours into the task, the output window stopped updating...