Re: [9fans] Changelogs & Patches?

[Roman Shaposhnik <rvs@sun.com>]

On Dec 27, 2008, at 3:56 AM, erik quanstrom wrote:
>> I'm actually still trying to figure out how replica/* fits together
>> with
>> sources being a fossil server. These two, somehow, have to
>> click, but I haven't figured out the connection just yet. Any
>> pointers
>> to the good docs?
>
> there's no connection.  replica would work without a fossil server.
> for that matter, replica would work without a dump.  all you need
> is an original and a changed version.

Got it. The bit that I didn't quite get initially was the fact that
there's
history accumulated in dumps and that history might need to be
transferred *exactly* like it is to a different fileserver. And with
replica
only transferring the end result ("present moment" in history
terms) there seemed to be a missing link...

> i used replica (plus a few additional tools) to make a faithful copy
> of the coraid fileserver.  http://www.quanstro.net/plan9/history.pdf


...but your article answered that last question completely. Although,
I wonder whether direct transfer of history between two venti
servers would be possible.

Thanks,
Roman.

P.S. I also didn't quite understand the business of synchronizing Qids.
I have always thought that they are only meaningful for the duration
of the server's lifetime and thus all applications are quite immune to
potential Qid changes as long as the connection get dropped and
re-established. Or was it that your goal was to migrate so seamlessly
that *running* applications wouldn't notice?