Comment on What's your opinion on Ubiquiti/Unifi gear?

• Voroxpete@sh.itjust.works ⁨1⁩ ⁨day⁩ ago

  ZFS seems pretty RAM hungry

  This is a common misunderstanding.

  Short version; ZFS isn’t RAM hungry, it’s RAM aware. If your system has unused memory lying around, ZFS will use it to improve read performance. But it will give up that memory the moment anything else needs it. Like many other Linux processes, it’s just making the best use of the resources that are available.

  and I don’t believe you can add new drives to an existing volume.

  No longer true

  source

  • tofu@lemmy.nocturnal.garden ⁨1⁩ ⁨day⁩ ago

    Oh hell yeah, I didn’t know about the raidz extension. That’s amazing!

    It’s in the latest TrueNAS versions. www.truenas.com/blog/electric-eel-openzfs-23/

    source
  • early_riser@lemmy.world ⁨1⁩ ⁨day⁩ ago

    No longer true

    Does TruNAS support this feature?

    Related, will TruNAS work on a mini PC with an attached DAS?

    source

    • Voroxpete@sh.itjust.works ⁨1⁩ ⁨day⁩ ago

      It’s part of ZFS 2.3.0, so it just depends what version TrueNAS is shipping with.

      source
    • possiblylinux127@lemmy.zip ⁨1⁩ ⁨day⁩ ago

      How is the DAS connected?

      source

      • early_riser@lemmy.world ⁨1⁩ ⁨day⁩ ago

        Don’t own one yet. But I guess USB?

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  • possiblylinux127@lemmy.zip ⁨1⁩ ⁨day⁩ ago

    It does take time to free ram. If you need the ram for other things it is best practice to limit the arc cache

    source

    • Voroxpete@sh.itjust.works ⁨1⁩ ⁨day⁩ ago

      Only when you have to write out to swap. In the case of something like ZFS, it stores data in RAM, looks for it there, then looks on the disk. So freeing up the RAM is instantaneous; you just mark the space as free, then the other process writes into it.

      source