Comment by aboodman
13 hours ago
But this is kind of meaningless unless the tenants themselves are in one geo. Take linear as an example, this strategy works as long as your company that uses linear is all colocated in one area. As soon as you have remote people it falls apart.
But it does mean you gracefully degrade so the majority of the company sees the target latency <100ms and the rest of the company sees "not geo-optimized" latency.
Only in the case where there is such a majority of the company that is tightly geolocated.
Again, AWS latency us-west-1 to us-east-1 is 70ms. That's absolute best case for one round-trip that does absolutely no work. And it's ignoring the case of anyone outside of continental US.
Add in actual server-side work, db interactions, and contention - and you're quickly looking at hundreds of ms.