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Posted to user@couchdb.apache.org by Stuart Rackham <sr...@gmail.com> on 2011/09/01 03:09:39 UTC
Database synchronization protocol?
Hi
I posted this question to the UnQL mailing list
(http://groups.google.com/group/unql/browse_thread/thread/ce538e3fd85fa769) and
it was recommended I post it to the CouchDB list:
In the same way that UnQL standardizes document database queries does anyone
know of any work being done on a standardized document database
synchronization protocol? It would be magical if heterogeneous
document databases could seamlessly synchonize and replicate in
CouchDB-like fashion.
Cheers, Stuart
--
Stuart Rackham
Re: Database synchronization protocol?
Posted by Mikeal Rogers <mi...@gmail.com>.
https://github.com/mikeal/replicate
On Sep 1, 2011, at September 1, 20117:00 AM, Benjamin Young wrote:
> Oh dear... ;) Not at all the same thing. :)
>
> I agree with Stuart that it'd be great to see the CouchDB replication "protocol" (HTTP + MVCC + _changes feed...mostly) codified into a specification that could be implemented anywhere. There's working being done to prove that it can be with Mikeal's PouchDB project:
> https://github.com/mikeal/pouchdb
>
> Perhaps the first step looks like listing off the key pieces of the puzzle and things that might be less obvious like needing consistent, though arbitrary, conflict "resolution" (always selecting the same winner).
>
> Anyone know if there's a wiki page or blog post that would get this process started? If not, anyone know enough about the feature to start one? :)
>
> Thanks,
> Benjamin
>
> On 9/1/11 9:07 AM, Roger Rohrbach wrote:
>> This isn't exactly what you're asking for, but behold: SyncML (http://www.openmobilealliance.org/tech/affiliates/syncml/syncmlindex.html).
>>
>> And weep. :-(
>>
>>
>> On Sep 1, 2011, at 3:09 AM, Stuart Rackham wrote:
>>
>>> In the same way that UnQL standardizes document database queries does anyone know of any work being done on a standardized document database synchronization protocol?
>
Re: Database synchronization protocol?
Posted by Paul Davis <pa...@gmail.com>.
The only thing you need to make replication work are the algorithms
around couch_key_tree. Then if you want to make it incremental, you
need the update sequence index. After that its all just optimization.
On Thu, Sep 1, 2011 at 9:00 AM, Benjamin Young <be...@couchone.com> wrote:
> Oh dear... ;) Not at all the same thing. :)
>
> I agree with Stuart that it'd be great to see the CouchDB replication
> "protocol" (HTTP + MVCC + _changes feed...mostly) codified into a
> specification that could be implemented anywhere. There's working being done
> to prove that it can be with Mikeal's PouchDB project:
> https://github.com/mikeal/pouchdb
>
> Perhaps the first step looks like listing off the key pieces of the puzzle
> and things that might be less obvious like needing consistent, though
> arbitrary, conflict "resolution" (always selecting the same winner).
>
> Anyone know if there's a wiki page or blog post that would get this process
> started? If not, anyone know enough about the feature to start one? :)
>
> Thanks,
> Benjamin
>
> On 9/1/11 9:07 AM, Roger Rohrbach wrote:
>>
>> This isn't exactly what you're asking for, but behold: SyncML
>> (http://www.openmobilealliance.org/tech/affiliates/syncml/syncmlindex.html).
>>
>> And weep. :-(
>>
>>
>> On Sep 1, 2011, at 3:09 AM, Stuart Rackham wrote:
>>
>>> In the same way that UnQL standardizes document database queries does
>>> anyone know of any work being done on a standardized document database
>>> synchronization protocol?
>
>
Re: Database synchronization protocol?
Posted by Benjamin Young <be...@couchone.com>.
Oh dear... ;) Not at all the same thing. :)
I agree with Stuart that it'd be great to see the CouchDB replication
"protocol" (HTTP + MVCC + _changes feed...mostly) codified into a
specification that could be implemented anywhere. There's working being
done to prove that it can be with Mikeal's PouchDB project:
https://github.com/mikeal/pouchdb
Perhaps the first step looks like listing off the key pieces of the
puzzle and things that might be less obvious like needing consistent,
though arbitrary, conflict "resolution" (always selecting the same winner).
Anyone know if there's a wiki page or blog post that would get this
process started? If not, anyone know enough about the feature to start
one? :)
Thanks,
Benjamin
On 9/1/11 9:07 AM, Roger Rohrbach wrote:
> This isn't exactly what you're asking for, but behold: SyncML (http://www.openmobilealliance.org/tech/affiliates/syncml/syncmlindex.html).
>
> And weep. :-(
>
>
> On Sep 1, 2011, at 3:09 AM, Stuart Rackham wrote:
>
>> In the same way that UnQL standardizes document database queries does anyone know of any work being done on a standardized document database synchronization protocol?
Re: Database synchronization protocol?
Posted by Roger Rohrbach <ro...@ecstatic.com>.
This isn't exactly what you're asking for, but behold: SyncML (http://www.openmobilealliance.org/tech/affiliates/syncml/syncmlindex.html).
And weep. :-(
On Sep 1, 2011, at 3:09 AM, Stuart Rackham wrote:
> In the same way that UnQL standardizes document database queries does anyone know of any work being done on a standardized document database synchronization protocol?