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Date: Sun, 5 Jan 2014 11:06:09 -0600
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Subject: Re: ZFS command can block the whole ZFS subsystem!
From: Adam Vande More <amvandemore@gmail.com>
To: "O. Hartmann" <ohartman@zedat.fu-berlin.de>
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Cc: FreeBSD CURRENT <freebsd-current@freebsd.org>,
 Peter Jeremy <peter@rulingia.com>
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On Sun, Jan 5, 2014 at 9:41 AM, O. Hartmann <ohartman@zedat.fu-berlin.de>wrote:
>
> >
> > As already described by Dan and perhaps not followed up on:  dedup
> > requires at very large amount of memory.  Assuming 32GB is sufficient
> > is most likely wrong.
> >
> > What does zdb -S BACKUP00 say?
>
> That command is stuck for 2 hours by now ...


That is expected. It is not stuck, it is running.  It's output will
indicate what is the minimum required for your dataset. The command will be
slow if you have large dataset/insufficient ram.  Really slow if both.


-- 
Adam