Iinux ZFS Reporting improvement

Andrew Thomas

• October 04, 2022 20:45

From  Luke Bigum <luke.bigum@lmax.com>

I uploaded a set of capture data to the Live Optics UI.  The tool is impressive 🙂  Did Dell build this, or acquire this?

I can do a better capture - it's double counting some disks because the tool doesn't understand ZFS at all, and I was lazy and didn't exclude them.  On the same note, it's massively skewed the IOPS towards writes because ZFS's AR Cache will be taking quite a large portion of read hits from the disks themselves.

If you've got a line to the team behind this, put in a feature request to get it to understand Linux's in-memory disk caches, such as the standard Linux page cache or the ZFS ARC.  Right now it's not giving much insight to the read load and thus would be difficult to make a sizing decision on this data alone.

0

• 

  Peter Hunter

  • October 05, 2022 12:01

  Thanks for the info.  Yes, Live Optics is Dell built and a Dell product. Optical Prime doesn't currently support ZFS analysis.  Definitely something that we'd consider for the future.

  0

Please sign in to leave a comment.