Tried mapping asm01 to a raw device, called /dev/raw/asm01, but that doesn't
seem to be something I can run iostat against either.
I think a real trick for clustered storage is to understand the IO to
multipathed devices and graph over time.
Trying to gather (and graph my IO multipath aliases (to also send to
Ganglia)).
Using the linux native multipathd for multipathing. It is working well.
asm01 (1HITACHI_D60090910032) dm-6 HITACHI,DF600F
[size=32G][features=0][hwhandler=0]
\_ round-robin 0 [prio=1][active]
\_ 0:0:1:32 sdm 8:192 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 0:0:0:32 sdb 8:16 [active][ready]
I am trying to figure HOW I can get iostat –x information for the aliases.
An example is asm01 above. The dm that it points to can change (and does)
between reboots.
Tried mapping asm01 to a raw device, called /dev/raw/asm01, but that doesn't
seem to be something I can run iostat against either.
Has anyone figured a way todo this? Really IO stats are needed per alias.
Thanks!
Craig
On Fri, Jul 11, 2008 at 8:41 AM, Ethan Erchinger <[EMAIL PROTECTED]> wrote:
> Craig Simpson wrote:
>
> Does anyone have a method for monitoring Linux Multipathed Devices,
> created by multipthd and dm?
>
> Use udev to create /dev/ names that match your multipath names. On Rhat,
> a rule in /etc/udev/rules.d and a script in /etc/udev/scripts should be
> sufficient.
>
> http://www.redhat.com/magazine/002dec04/features/udev/
>
>
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