On 04/29/10 01:15 PM, Bart Smaalders wrote:
On 04/29/10 08:00, Dave Miner wrote:
I'm not quite following why it would need to be per subcommand; why
wouldn't a "always retain the pre-write snapshot" policy applied to all
subcommands be appropriate?
Retention of snapshots is really orthogonal to these changes, but
I think doing so would be a good idea... perhaps the default could
be that we preserve the last N changes, and delete the oldest one.
I was really focusing on the boot environment changes here... but I can
add retention of snapshots as well.
I was focusing on snapshots from the point of view that BE's don't
matter as much as long as you have a snapshot, since beadm can turn a
snapshot into a BE trivially.
We had done some preliminary design for BE snapshot retention policies
in an early version of the design doc[1] but we removed it since it
wasn't fully baked and wasn't an immediate need. I've thought it would
make sense to combine it with the time slider auto-snapshot management
policies, but hadn't tried to sort out a design at all.
Dave
[1]
http://hub.opensolaris.org/bin/download/Project+caiman/snap%2Ddocuments/snap%2Dlibbe%2Ddesign%2D0.7.pdf
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