Mike Gerdts wrote:
> The UFS on zvols option sounds intriguing to me, but I would guess
> that the following could be problems:
>
> 1) Double buffering: Will ZFS store data in the ARC while UFS uses
> traditional file system buffers?
>
This is probably an issue. You also have the journal+COW combination
issue. I'm guessing that both would be performance concerns. My
application is relatively low bandwidth, so I haven't dug deep into this
area.
> 2) Boot order dependencies. How does the startup of zfs compare to
> processing of /etc/vfstab? I would guess that this is OK due to
> legacy mount type supported by zfs. If this is OK, then dfstab
> processing is probably OK.
Zvols by nature are not available under ZFS automatic mounting. You
would need to add the /dev/zvol/dsk/... lines to /etc/vfstab just as you
would for any other /dev/dsk... or /dev/md/dsk/... devices.
If you are not using the z_pool_ for anything else, I would remove the
automatic mount point for it.
-Brian
--
---------------------------------------------------
Brian H. Nelson Youngstown State University
System Administrator Media and Academic Computing
bnelson[at]cis.ysu.edu
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