Understanding the ZFS tuning
By Toots, 1 year, 6 months ago, modified March 3, 2009
ZFS is all about performance (many levels of caching, pre-fetch, ...) and memory consumption :-)
Here are my last links about ZFS internals, it's worth a read if you plan to use ZFS on large productions :
- The slides of Adam Leventhal's talk for the OpenSolaris Storage Summit : ZFS, Cache, and Flash
- c0t0d0s0.org : a very good explanation of the ARC cache : most recently used pages, most frequently used pages and their ghosts lists Some insight into the read cache of ZFS - or: The ARC and the writing side
- The arc_summary.pl tool is very useful for analysis, made by Ben Rockwood with the kstat counters.
- Also by Ben Rockwood : ZFS in the Trenches is an overview of a real-life-production usage of ZFS : interesting counters and tuning hints at the different levels (monitoring, ARC, ZIL, Physical I/O, backup & replication), useful tools, and experience sharing. A must-read !
- And before anything, always refer to the ZFS Best Practices Guide of solarisinternals.com
If you have some interesting links about ZFS too, share them with us in the comments !
Thomas
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Another repeating action when debugging is just to look for the value of something (call the description method of an object)
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