Skip site navigation (1)Skip section navigation (2)
Date:      Fri, 22 Mar 2013 19:24:47 +1100
From:      Peter Jeremy <peter@rulingia.com>
To:        Zaphod Beeblebrox <zbeeble@gmail.com>
Cc:        freebsd-fs <freebsd-fs@freebsd.org>
Subject:   Re: ZFS: Almost a minute of dirty buffers?
Message-ID:  <20130322082447.GC81066@server.rulingia.com>
In-Reply-To: <CACpH0MfFEa5wbA2n82jX5v=V2tBPjDd=zqzTJkBs3S_GXML8QQ@mail.gmail.com>
References:  <CACpH0MfFEa5wbA2n82jX5v=V2tBPjDd=zqzTJkBs3S_GXML8QQ@mail.gmail.com>

next in thread | previous in thread | raw e-mail | index | archive | help

--BXVAT5kNtrzKuDFl
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On 2013-Mar-19 16:45:36 -0400, Zaphod Beeblebrox <zbeeble@gmail.com> wrote:
>... and ZFS takes nearly a minute of very active disk to shutdown ?!!?
>
>Are these dirty buffers?  What is it doing?  This period of disk blinking
>seems to be related to uptime (ie: longer uptime, longer blinking on
>shutdown).

Well, ZFS will be flushing all dirty buffers and the ZIL and then
serially (synchronously) updating all 4 vdev headers on each disk -
though this shouldn't take a minute.

How many filesystems are in your pool?
How much dirty data does your system have?

--=20
Peter Jeremy

--BXVAT5kNtrzKuDFl
Content-Type: application/pgp-signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (FreeBSD)

iEYEARECAAYFAlFMFU4ACgkQ/opHv/APuIcfXACgslEAV3a9kBHzyXyPK+9xzE+j
or8An3+oSDOnzB1GTu1u8M4KJOocnlq3
=QKQl
-----END PGP SIGNATURE-----

--BXVAT5kNtrzKuDFl--



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20130322082447.GC81066>