Keep Da Link

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

In NAT mode (the default one), virtualbox does not give you the possibility to directly connect to your guest os.

Here is how to configure your Virtualbox to simply ssh myguest

Improving MapReduce Performance in Heterogeneous Environments