Search results for query: QLC ZFS

Thank you for quick answer, I think I did not enable Discard if it is not default. Most VMs until 1 came from the PBS backuped from the HP Server and restored to NUC. Yes there is no mirroring any more. I know that is not the best choice, but I couldn't find actuell hardware that is good for...

Did you enable Discard and setup trim inside your VM: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#qm_hard_disk_discard ? Did you make sure there are no snapshots left in your VMs? PS: I don't see any RAID1 in your zpool status output. I do see drives that will perform poorly with ZFS...

Ich gehe davon aus, die Fehler kommen ganz einfach daher, dass es QLC SSDs sind. QLC und ZFS ist eine tödliche Kombination und da die SSDs dazu neigen extreme Latenzen zu erzeugen unter Last, kommen die Fehler vermutlich daher.

I have a Problem based on your selection of the LEXAR NM610 PRO, these are Not for ZFS Usability QLC flash. You must have enterprise flash, DRAM cache snd PLP. You need many IOPS on random 4k read and write. Not only aprox. 40 MB/s read and 150 MB/s write. User ZFS RAID 10 setup with SSD SATA3...

Thanks for info about QLC, I will consider upgrade SSDs. I didn't notice it's new version of kernel, try it.

QLC wears out quickly and can become terribly slow with Proxmox and ZFS (see other threads in this forum). I'm happy for you that you did not have any problem before. Maybe it's a kernel incompatibility with your hardware, if it ran fine before? Maybe install the latest kernel version 6.8.12-2...

Wrong "Proxmox marked a ZFS" that's not right! Proxmox is a extension to Debian 12.7 and in the future to Debian 13. The SSD SAMSUNG 870 QVO 4 TB has a Chiptyp: QLC thats bad. everytime 4 Bit must be written to the flash cells. that's slow. IO don't see any dram cache on the device. There may...

QLC drives are really the worst for ZFS. Use it in your Windows PC but not in a server. There are plenty of threads here in this forum. Just search for QLC...

MX500 is not great but P3 Plus is QLC which is terrible for ZFS. And RAIDz1 is not great for VMs. Please search the forum a bit about PLP, QLC and RAIDz1.

On a fresh installation Proxmox does not shut down VMs and stop running when one side of a ZFS mirror fails. What caused the (temporary?) drive failure? Maybe it also caused a failure of the other drive (which could not be written to the system log because it was the last drive)? Maybe it was...

Als Datendisk im ZFS Pool sind die für zuhause voll OK. Aber als Special Device bekommen die viel mehr kleine Writes ab. Als Special Device nehme ich als großer Read Intensive SSD Verfechter auch Mixed Use SSDs. Da sehe ich immer deutlich mehr Writes und am Ende des Tages zählen da nicht die TB...

@Falk R. In deinem unternehmerischen Bereich ist das klar und richtig. Was ist den "kürzester Zeit" in deiner Terminologie? Es war von Anfang an klar es ist ein Hobby Projekt und Kosten spielen eine Rolle. Deshalb verteidige ich auch meine Empfehlung. Mit den ersten Gedanken diese SSDs zu...

@leesteken, sorry to bother you, but have you had a chance to look at the information I provided in the previous comment? ( :

Thank you again for your time, it means a lot to me! Apologies, noted, for some reason typing it out as "ProxMox" comes naturally to me while typing, its not by intent, I will try to be more careful. I am a newbie to Proxmox, so please let me know if there are other files I can also provide...

Please note that It's called Proxmox VE or PVE for short or just Proxmox but not ProxMox. Are you running Proxmox on ZFS (maybe show /etc/pve/storage.cfg also)? I would not expect that to matter much if the VM and the source and destination are not on that drive. Unless Proxmox is logging a lot...

Hi and thank you for your reply! I see... So the SSD is a Samsung 870 EVO, 4TB, 2.5", SATA III, I just checked and this is what I found: "The 870 EVO uses TLC (or 3bit MLC, as dubbed by Samsung) 3D V-NAND, is available in capacities from 256GB up to 4TB, and features the company’s newest...

Deleting threads is not possible (except for staff members but they only seem do that for spam). It's not clear to me what SSD drive you are using. ZFS on a QLC SSD is known to become unresponsive. ZFS with heavy swapping on the host can also lead to some kind of deadlock.

I see -- I had no idea about this limitation! Is there some technical explanation as to why QLC specifically makes it incompatible with ZFS? I have seen some talk about why (HDD) SMR does not work, but not QLC. Thanks for that! I did not know any specifics about ZFS caching. But in my case, is...

Yes, it's unusable with ZFS but people find that hard to believe (in earlier discussions about that): https://forum.proxmox.com/search/7408381/?q=QLC&t=post&c[child_nodes]=1&c[nodes][0]=16&o=date

Most likely, yes. The two SATA drives were quite cheap (Insenso brand, if that says anything), so would likely be QLC. But would it become this slow, to the point that transfers actually stop while data is written out to the nand cells?