Comment

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

ZFS seems pretty RAM hungry

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

Sort:hotnew top

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?
    
    source
    tomten@lemmy.world ⁨1⁩ ⁨day⁩ ago
    Don’t use USB to connect hdds to a nas, it isn’t reliable enough and will causes problems, it’s just a matter of time.
    
    source
    -> View More Comments
    possiblylinux127@lemmy.zip ⁨22⁩ ⁨hours⁩ ago
    TrueNAS doesn’t support external connectors like USB
    
    source
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