On 6/23/08 7:45 PM, "Richard Elling" <[EMAIL PROTECTED]> wrote:

> I think the ability to have different policies for file systems
> is pure goodness -- though you pay for it on the backup/
> restore side.

And another reason why Automated Data Migration is the way to go.  "Backup"
and "replication" schemes are problematic for a number of reasons, not the
least of which is "remembering what filesystems to back up."  If the
filesystem itself is taking care of things, you're probably more likely to
"get it right."  This is especially true if, like ZFS object propoerties,
ADM properties are inherited.  E.g., set / to back up, and everything else
is automatically protected.  Go "custom" wherever appropriate.

Having already been saved by a Time Machine backup that occurred just 20
minutes before my laptop hard drive died, I'm convinced Apple got it right
in making the default a "back up everything" approach.  While their solution
isn't integrated into the filesystem, as I expect ADM will be with ZFS,
there's something to be said for the "whole system approach."


> A side question though, my friends who run Windows,
> Linux, or OSX don't seem to have this bias towards isolating
> /var.  Is this a purely Solaris phenomenon?  If so, how do we
> fix it?
>  -- richard

Well, having spent a lot of time on the IRIX side, yeah, it's just a
"Solaris thing."  And S10U5 at least now only defaults to TWO partitions
(bigger / than before, and /export/home).  Baby steps, I suppose :)

Charles
 

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