ZFS: Almost a minute of dirty buffers?

[Peter Jeremy]

On 2013-Mar-19 16:45:36 -0400, Zaphod Beeblebrox <zbeeble at 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
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 196 bytes
Desc: not available
URL: <http://lists.freebsd.org/pipermail/freebsd-fs/attachments/20130322/7ac29375/attachment.sig>