Date: Fri, 25 May 2007 23:58:59 +1000 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Norberto Meijome <freebsd@meijome.net> Cc: freebsd-questions@freebsd.org Subject: gstat [was: raid or not raid] Message-ID: <Pine.BSF.3.96.1070525225605.3835C-100000@gaia.nimnet.asn.au> In-Reply-To: <20070525120026.845C416A4F5@hub.freebsd.org>
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Hey Beto,
On Fri, 25 May 2007 19:55:47 +1000 Norberto Meijome wrote:
> replying to your email down the thread...but using this content...
hijacking the thread almost entirely off to the side ..
> > 0 6 6 627 8.5 0 0 0.0 5.0| ad4s1g
>
> the g partition in slice 1 of disk ad4.
>
> They all get used (from the GEOM POV) when , for example, userland
> access the fs located in ad4s1g .
>
> clear as mud? ;)
Not having played with RAID here, gstat was useful news, ta, especially
as vmstat & iostat don't show acd0 anymore .. however I'm a bit puzzled
by the below; nothing but 'find / -name xdfsfdxfx' running, so why does
it show so much write activity? This is consistent (with find anyway).
dT: 10.005 flag_I 10000000us sizeof 240 i -1
L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name
0 0 0 0 0.0 0 0 0.0 0.0| fd0
0 0 0 0 0.0 0 0 0.0 0.0| cd0
1 156 134 880 6.7 22 352 23.0 89.0| ad0
0 0 0 0 0.0 0 0 0.0 0.0| acd0
0 0 0 0 0.0 0 0 0.0 0.0| ad0s1
1 156 134 880 6.7 22 352 23.5 89.3| ad0s2
[..]
0 0 0 4 23.4 0 0 0.0 0.7| ad0s2a
0 0 0 0 0.0 0 0 0.0 0.0| ad0s2b
0 0 0 0 0.0 0 0 0.0 0.0| ad0s2c
0 0 0 0 0.0 0 0 0.0 0.0| ad0s2d
1 155 133 876 6.8 22 352 24.0 90.6| ad0s2e
I thought maybe updating file access times? but would that be so much of
a penalty, even on this 300MHz laptop with a UDMA33 5400rpm drive ..
BTW, this is on 5.5-STABLE, seeing you weren't sure about it on 5.x
> Your reasoning is excellent -- it's only your basic assumptions that
> are wrong.
Probably very apt :)
Thanks again, Ian
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