5 ms·

Are there performance issues for this with BTRFS as well or just ZFS?

• atmosx 6y ago
  I don't know about BTRFS but ZFS is expensive in terms of RAM and since ram is scarce on RPis, I would expect ZFS to underperform under RPis.
  • tpxl 6y ago
    RPi 4 goes up to 8G RAM which is more than enough.
    • nuker 6y ago
      I found for 5x 10TB disks TrueNAS needs more than 8GB.
      • magicalhippo 6y ago
        TrueNAS eats a lot of memory for itself though. Just the web frontend thing eats 3GB on my box, and "services" eats about 12-16GB total (most of which I have no idea where is going). Since ZFS uses memory for caching, it will perform much better with more memory, but it should work[1] with less. [1]: https://www.reddit.com/r/DataHoarder/comments/5u3385/linus_tech_tips_unboxes_1_pb_of_seagate/ddrngar/ https://www.reddit.com/r/DataHoarder/comments/5u3385/linus_t...
    • atmosx 6y ago
      is it? $ zpool status pool: storage state: ONLINE scan: resilvered 854G in 04:18:32 with 0 errors on Sat Jun 20 18:30:06 2020 config: NAME STATE READ WRITE CKSUM storage ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 sda ONLINE 0 0 0 sdc ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 sdb ONLINE 0 0 0 sde ONLINE 0 0 0 errors: No known data errors $ grep -e '^size' /proc/spl/kstat/zfs/arcstats size 4 8604931056 $ bc -q 8604931056 / (1024*1024*1024) 8 On could tune ARC opts and whatnot, but I'm not sure how reliable and fast the system will turn out to be.