Understanding the ZFS tuning

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Understanding the ZFS tuning

By Toots, 2 years, 11 months ago, modified March 3, 2009

solaris
zfs

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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