freebsd stable - Mar 2010 - ZFS question

I wasn't sure what the most appropriate mailing list to address this problem
would be, so I'll go ahead and ask it here.  This is probably most directed
toward PJD, as he did directed the porting effort of zfs to freebsd.  There
are many read only sysctl handles to L2ARC and L1ARC caches, as well as
performance stats.  Some of these are self explanatory based on their naming
conventions, however some are more vague than others.  Could I perhaps get a
detailed explanation of what those sysctls related to zfs actually are
describing?  I'm hoping to build a decent web interface with RRDTool that
has accurate and useful information in regards to ZFS performance
monitoring.  Storage analytics are becoming an increasingly popular trend
and are EMC's advantage over something like FreeNAS.  My efforts are to make
a nanoBSD based distro for NAS systems, but aim at different goals than
FreeNAS (for example, including built in HAST support).  I'm not sure if
I'm
going to use m0n0wall's framework or start from scratch, still evaluating
which endeavor will be best to maintain and fit the job.  Anyway, any
explanation would be appreciated, even if you're not the great PJD :-p.

Hi,

You may find some good information in arc_summary.pl script for
FreebBSD by jhell:
http://jhell.googlecode.com/files/arc_summary.pl

I've also did some plugins for munin, where based on that, and looking
on the code, I tried to provide some interpretation of L2ARC/ARC
statistics (see attached scripts). I'm still not sure, if I have all
the important stuff visible on the graphs.

Cheers,

Wiktor Niesiobedzki

2010/3/10 Adam Stylinski <stylinae@mail.uc.edu>:
> I wasn't sure what the most appropriate mailing list to address this
problem
> would be, so I'll go ahead and ask it here. ?This is probably most
directed
> toward PJD, as he did directed the porting effort of zfs to freebsd. ?There
> are many read only sysctl handles to L2ARC and L1ARC caches, as well as
> performance stats. ?Some of these are self explanatory based on their
naming
> conventions, however some are more vague than others. ?Could I perhaps get
a
> detailed explanation of what those sysctls related to zfs actually are
> describing? ?I'm hoping to build a decent web interface with RRDTool
that
> has accurate and useful information in regards to ZFS performance
> monitoring. ?Storage analytics are becoming an increasingly popular trend
> and are EMC's advantage over something like FreeNAS. ?My efforts are to
make
> a nanoBSD based distro for NAS systems, but aim at different goals than
> FreeNAS (for example, including built in HAST support). ?I'm not sure
if I'm
> going to use m0n0wall's framework or start from scratch, still
evaluating
> which endeavor will be best to maintain and fit the job. ?Anyway, any
> explanation would be appreciated, even if you're not the great PJD :-p.
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