I have 2 locations in my account. When I click on one location the web URL is graph-na02-useast1.smartthings.com, the other is just graph.api.smartthings.com. Is there a difference between them?
Yes and no. They are on different shards which splits the load. In theory nothing is different but in reality the newer shard has less users and typically gets updates a bit slower so it can be a bit more stable.
From a developer perspective have multiple shards has caused a few issues. But nothing show stopping.
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We are getting pretty close to shard parity - at this point, the delay in updates getting rolled out across regions is usually less than a few hours. From the end-user perspective, the difference in updates pretty negligible.
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Beware that I think any custom code (SmartApps or Device Type Handlers) that you write or paste into your “Account” is not automatically replicated between the Shards / Locations!
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