[Seaside] Re: [squeak-dev] Upgrading running servers?

Avi Bryant avi at dabbledb.com
Thu Apr 3 19:38:46 UTC 2008

On Thu, Apr 3, 2008 at 12:00 PM, Stephen Pair <stephen at pairhome.net> wrote:
> If I understand what DabbleDB does, they essentially give each user their
> own squeak process to run in.  When a session is first established, they
> start up a new image.  Upgrading would be a matter of dropping a new image
> somewhere and as old sessions expire and new ones created, users are
> migrated over to the new code.  With hydraVM, a scheme like that might be
> doable with just a small bit of session management in the main image.

That's more or less right, yes.  I've used variations on that strategy
before - in general, having multiple images going where old sessions
go to the old image but new sessions get routed to the new image makes
for very smooth upgrades.


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