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>
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[-- Attachment #1 --] 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? -- Peter Jeremy [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlFMFU4ACgkQ/opHv/APuIcfXACgslEAV3a9kBHzyXyPK+9xzE+j or8An3+oSDOnzB1GTu1u8M4KJOocnlq3 =QKQl -----END PGP SIGNATURE-----
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