Jerry Jelinek's blog

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Month: December 2005

Its been quite a long time since my last blog entry.
I have moved over from the SVM team onto the Zones team
and I have been busy coming up to speed on Zones.

So far I have just fixed a few Zones bugs but now I am
starting to work on some new features. One of the big
things people want from Zones is the ability to move
them and clone them.

I have a


for moving and cloning zones over on the
OpenSolaris zones discussion. This has been approved by our internal
architectural review committee and the code is basically done so it
should be available soon.
Moving a zone is currently limited to a single system but the
next step is migrating the zone from one machine to another.
Thats the next thing we’re going to work on.

For cloning we currently copy the bits from one zone instance
to another and we’re seeing significant performance wins compared
to installing the zone from scratch (13x faster on one test machine).

now available
it seems obvious that we could use ZFS clones to quickly clone
Zone instances. This is something that we are actively looking at
but for now we don’t recommend that you place your zonepath on ZFS.
This is bug

and is due to the current limitation that you won’t be able to
upgrade your system if your zonepath is on ZFS. Once the upgrade
issues have been resolved, we’ll be extending Zone cloning to be
better integrated with ZFS clones. In the meantime, while you can
use ZFS to hold your zones, you need to be aware that the system won’t
be upgradeable.

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