[sync] sync performance and P900

[Karsten Fourmont]

whoa.

a few days ago I thought nowbody would use this code besides me and now 
people are telling me they are syncing thousands of contacts ;-)

Well basically it's a shame that the horde server is unable to come up 
quickly enough with the data. We'll have to look into that.

Other than that the SyncML spec has a "BUSY" mechanism which should deal 
with exactly this case.

Maybe look at
http://www.syncml.org/docs/syncml_sync_protocol_v11_20020215.pdf

I added it to the todo list.

Cheers,
  Karsten


Andrew Suffield wrote:

> Syncing with a P900 mostly works for me, but with one very irritating
> problem: the phone gives up after about ten minutes of waiting for a
> response from the server.
> 
> Normally this doesn't matter - but when doing a full sync of a very
> large (thousands of entries) calendar or contacts database, the phone
> times out before the server has finished stuffing all the records into
> the database.
> 
> And the phone usefully does not provide a way to adjust the
> timeout. Which is completely broken and there's nothing we can do
> about it.
> 
> I've tried to speed this up on the server, and made some progress, but
> nowhere near enough; it still takes almost twenty minutes to process
> the stupidly huge contacts database. Ultimately it's the wrong
> approach anyway, as there will always be a point where the data set is
> too large.
> 
> I think a hack is called for, to work around this braindamaged
> device. I'm not sufficiently familiar with the protocol to figure out
> what, but the obvious answer would be to send data back to the phone
> before it's all been processed.
>