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From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
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Cc: freebsd-fs@freebsd.org
Subject: Re: Monitoring ZFS IO
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On Fri, 2 Dec 2011, Matt Burke wrote:

> On 12/02/11 14:47, Ronald Klop wrote:
>> while true; do gstat -b -I 1s; done
>
> Looks like I wasn't clear about what I'm after - sorry.
>
> I want to see how many bytes or KB have been read and written to a given
> zpool since creation (as in the newer of uptime or zpool creation) on the
> system.

This implies that these statistics would need to be stored in the pool 
itself, which implies that the statistics need to be periodically 
written (e.g. in each transaction group) as a form of metadata.

Bob
-- 
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/