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10.6: Sync contacts to Macs, PCs, iPhones, and BlackBerries
Authored by: davidduff on May 14, '10 12:42:50PM

your instructions say "repeat these steps" for all macs, and it appears that you mean this to include turning on both mobileme and google sync. this makes me nervous. are you confident that there are mechanisms in place to track changes and to prevent problems with the two sync systems trying to "fight" each other?

example: i get sync hooked up on multiple macs between both mobileme and google and let's say it's initially stable. let's say i make a few changes to some contacts. these changes propagate out, racing to my other machines via two separate channels. updates could other machines via google first or via mobileme first. whichever one gets there first could trigger another update going to the opposite service. so for example, if the changes propagate to other macs via mobileme first, then google may see a bunch of updates for the same contact coming from multiple machines. can it tell these are the same change? or will it flag these as conflicts? can you be assured that the final result will converge to the desired state in all cases?

if all these changes are being propagated by a single "smart" architecture designed for multi-system sync (isync perhpas?), then perhaps it will "do the right thing" in terms of how it handles changes, however i am slightly skeptical regarding having cyclical dependencies in your sync chain.

anybody have experience with living with this configuration for a while? does it work reliably? are the underlying sync technologies smart enough to track things at the level of specific updates (with unique id's or timestamps)?

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10.6: Sync contacts to Macs, PCs, iPhones, and BlackBerries
Authored by: rajivpillai on May 15, '10 07:45:29PM

You are absolutely right. The only thing I forgot to mention was that you need ensure that the Time is synchronised on all systems & handhelds. Again, it doesn't have to match second to second since there will hardly be a time that you would edit the same contact on multiple systems or handheld at the exactly same time.

So, this has worked for me and anyways, I have the archive in case some stupid update somewhere screws up things.


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