Recent content by IsThisThingOn

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    NAS UGreen DXP4800 Plus

    Warum sollte PVE genügsamer sein als TrueNAS? Wer das behauptet, hat ARC nicht verstanden. ARC ist adaptive replacement cache. ARC ist read cache. ARC beinhaltet aber auch einen dirty write cache, die 5s goal async TXGs writes. Der reach cache kann jederzeit geschrumpft werden. Die dirty writes...
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    ZFS storage is very full, we would like to increase the space but...

    On a serious note though, how old is your hardware RAID @cybermod? What would you do, if it fails tomorrow? These are IMHO questions you have to ask yourself when running Hardware RAID, since it is not always that easy to reimport a pool as with ZFS.
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    ZFS storage is very full, we would like to increase the space but...

    I would argue that it is the best tool for MOST use cases. Just because a lot of people use a hammer with the claw side to hammer in a nail, doesn't mean it isn't the greatest to tool to hammer in a nail. Edit for all the hardware RAID fanboys: RAID is a very old tool. Hardware RAID will likely...
  4. I

    NAS UGreen DXP4800 Plus

    Naja, wenn du ein 4k file in einem 64k volblock änderst, ist die write Amplifikation nun mal 16 fach. Wenn du ein 64k file in einem einem 64k volblock änderst, hast du gar keine. Wie NTFS selbst formatiert ist, ist nochmals ein Komplexitätslayer im Test. Der default ist glaube ich für Windows...
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    ZFS storage is very full, we would like to increase the space but...

    It works, but it is not great. All your files are in 16k volblocks. So if you do that, make sure that to check the storage efficiency for that. Just take a look at this table at the 16k line https://github.com/jameskimmel/opinions_about_tech_stuff/blob/main/ZFS/The problem with...
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    NAS UGreen DXP4800 Plus

    Klar. Aber mein mobo unterstützt kein SR-IOV (oder hat den Intel bug diesbezüglich) und mit vInterfaces auf der Netzwerk Karte habe ich aufgegeben. Zudem geniesse ich es jetzt, wenn das Internet weiterläuft, auch wenn ich ein Proxmox Neustart mache :)
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    NAS UGreen DXP4800 Plus

    Ich vermute du hast write amplification wie Sau ;) Nee aber mal ernsthaft, du hast ext4 VMs deren QEMU2 disks auf einen NFS share sind und dieses NFS share nutzt ZFS? Stimme euch beiden zu. Ich vermute mal OP aber ist Storage wichtiger, weil richtig geil ist die ausgesuchte Hardware jetzt...
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    NAS UGreen DXP4800 Plus

    TrueNAS drauf und los :) Entgegen meines Vorposters finde ich da Storage wichtiger und das bisschen Hypervisor kann auch TrueNAS. Man könnte auch keine grossen VM disks haben, weil die VMs selbst auf einen NFS share zugreifen und darum selber nur 50GB grosse VMs sind.
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    ZFS storage is very full, we would like to increase the space but...

    Another great explanation of that topic: https://forums.truenas.com/t/understanding-openzfs-capacity/2444 It even has a picture of a 7 wide RAIDZ2 with 128k. Not exactly your 8 wide, but pretty close: See the two X sectors? That is 8k padding for every single 128k stripe. It is similar with...
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    ZFS storage is very full, we would like to increase the space but...

    BTW, that calculator has an interesting note regarding the zfs list command you used: Maybe this is what screwed your tests? I honestly have no idea. Here is another, IMHO even better calculator. And if you scroll down all the way to the bottom, there is also explanations behind his math...
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    ZFS storage is very full, we would like to increase the space but...

    No, that is not an actual real-world result, considering how complicated free space reporting is in ZFS. That is: wer misst, misst Mist A real world test would be you setting up a 4 wide RAIDZ1 vdev with 1TB HDDs, create a 16k zvol with compression disabled, create a RAW image inside that zvol...
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    NAS UGreen DXP4800 Plus

    Verstehe nicht ganz deine Frage, noch dein Setup. Ich kann nur sagen, irgendeine Form von Disk, in Form einer Datei (zum Beispiel QCOW2 oder VDI) zu verwenden, und diese Datei/Disk dann auf ein NFS share zu legen, und dieser NFS share hat dann als Unterbau eine ZFS Dateisystem, was ein CoW...
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    ZFS storage is very full, we would like to increase the space but...

    Just for fun, we can do the math for your setup and what you should get with 128k. Let's look at a 132k write. First block is an incompressible 128k write. Second is also a 128k block but with only 4k data, the rest zeros. LZ4 can compress that down to a 4k block. Side note: This is one of the...
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    ZFS storage is very full, we would like to increase the space but...

    That question is an oversimplification ;) But most likely, it would rise of course. Since a lets say from 128k down to 100k compressed block can make use of wider stripes and easier fit the pool geometry, padding has less impact and so on. But nobody would use 128k for VMs. We have a saying in...
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    ZFS storage is very full, we would like to increase the space but...

    This is another big trap. I already explained that one: So no you are correct, of course won't see 96TByte for your 8 wide 18TB RAIDZ2. You will see 6*18=108TB as your rightfully said so far we agree. But if you create a zvol with the 16k defaults and then create a 1TB RAW VM disk, and fill...