Search results for query: QLC

...have Proxmox installed to / use for data? SMR might be killing your performance, and Heaven help you if you're using something like a BX500 or QLC SSD. Both are absolute dumpster-fire level crappy tech How you have things configured on the virtual side also matters, you should be using...

...related to storage type, so I still don't understand. I mean that you are not using enterprise SSD with PLP but are probably using a consumer QLC SSD drive. I think 512MB or 1GB is enough but just test it yourself for your workload. Since you stated that the minimum for the VM is 4GB, I...

Set VM Disk "Cache" to Default (None) , Write cache can be the bottleneck, moreover on consumer SSD, even more with QLC SSD like your. VM Disk "Async IO" to native should help too. ZFS will wear out this QLC SSD, moreover with SQL, because of write amplication.

ZFS mit mehreren VM entspricht Serverworkload. Also mehr als ein einzelner PC. Das glaube ich nicht. Es gibt QLC als Enterprise schon seit Jahren, aber bisher nur in Archivsystemen. Rate mal warum.

Da hast du schon recht, dass der Test nicht so vielsagend ist. Aber genausowenig vielsagend ist ein Begriff wie Serverworkload :p Und in drei Jahren haben vermutlich auch die Enterprise SSDs nur noch QLC :eek:

...GB Datei landet alles im Cache. Außerdem sind die Dinger wenn leer großzügiger beim Cache. Mit Befüllung wird das in der Regel auch schlechter. QLC hinter einem Controller mit gepufferten DRAM Cache, mag noch gehen. Ich möchte in meinem Notebook aber nicht so eine Gurke haben. Für...

Nun ja, ich hätte zu QLC das Gleiche gesagt, aber zu den 870 QVOs finde ich gerade: Lesen 560MB/s Schreiben 530MB/s SLC-Cached (160MB/s QLC) Cache 2GB (LPDDR4), SLC-Cache (dynamisch bis 78GB) Und diesen Test, der zumindest in seinem Rahmen bestätigt, dass es nicht totale Gurken sind...

...available space for the pSLC area. - On a TLC (3-bit per cell) eMMC, this will result in one third the available space for the pSLC area. - On a QLC (4-bit per cell) eMMC, this will result in one fourth the available space for the pSLC area. And some eMMC manufacturers block the mode-switch...

So you advise the SN850x? I guess you also separated OS from storage? I'm also interested in setting up CEPH in the future. I now have an Lexar 4TB nvme in my Proxmox node. It has TLC and a high TBW but no dram I think..

...Use SSDs with power safe write cache on SLC. (Single Layer Cell). This is a small zone of the SSD reserved for those operations. * Run away from QLC (Quad Layers Cell) if you do not want do loose your money (and your data). * Monitor your disks. Professional SSDs will be 3-5x more expensive...

...the single-core-speed of the processor yet. I tested also using a NVMe, Samsung SSD 970 EVO Plus 500GB , which is unexpected slow in this test (QLC and big internal blocks maybe), so the VM is as fast as native. (Debian 12, AMD Ryzen) Host: $ fio --filename=test --sync=1 --rw=randwrite...

...our 2.5" SSDs are Intel 4TB data center ssds and the are fantastic. The NVMEs are crucial P3 and they (apparently) have a SLC cache in front of QLC and once that cache fills the performance goes into the toilet. It's unbelievably bad once that happens. I'll be buying some Micron 7450 Pro...

Hi, i search for the technology used in these drives, its not that clear but it seems to be qlc (http://www.madshrimps.be/articles/article/1001277/Patriot-P210-2TB-2.5-SSD-Review/2#axzz8ry0ZAeNQ) WITHOUT any ram. If you look at the performance test of this site...

The exact name of the disks is Toshiba NAS N300 HDWN180. And according to a quick google search, these shoult be CMR. That would be okay, right? Yes, at the moment the disks are still connected to the HPE Raid Controller. I only deleted the array. I can try connecting the disks directly. No, so...

It was just a guess as there was no information to rule SMR or QLC out. Are the drives still connected to the RAID-controller? It is recommended to not use a hardware RAID-controller with ZFS: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_hardware_2 If you are having the same problem...

Hi leesteken Thank you very much for your quick reply. I use the NAS N300 4 TB disks from Toshiba. Do you really think it is the combination HDDs + ZFS? Because yesterday I had the same behavior when I made the RAID 10 with my hpe smart array p408i-a sr gen10 controller. And wouldn't it have...

What drives (make and model) are you using? QLC flash and SMR harddisks slow down on sustained writes and need idle time to recover. There is more than one thread on this forum that warns against using them for VMs (especially with ZFS).

Hättest du meine Posts gelesen wüsstest du auch warum. Nochmal zur Erinnerung: Consumer SSDs nutzen ihre TLC/QLC Zellen im SLC Schreibmodus als Cache. (es wird nur ein Zustand pro Zelle statt 3 Zustände bei TLC geändert) Der ist aber limitiert, da du sonst die SSD sehr schnell füllen würdest und...

Dann hast du dich nie mit der Technik befasst. ;) Also ganz einfach. Wir nehmen mal eine TLC SSD (bei QLC wird alles nur schlimmer). Wenn du deine Daten auf deine SSD schreiben willst, dann müssen 3 Bit auf die Zelle geschrieben werden, was relativ langsam ist. Daher nutzen Consumer SSDs die...

...BC640732095301278674 white label, es sollen Kingston chips verbaut sein, 2TB. Ich habe aber nichts darüber gefunden ob es TLC, MLC oder QLC ist. @ivenae Deine Vermutung trifft fast zu. Tatsächlich muss ich Aufbewahrungspflichten beachten und Kunden noch Daten zur Verfügung stellen können...