Horizon 1.0: a realtime, open-source JavaScript back end from RethinkDB

Re:Horizon 1.0: a realtime, open-source JavaScript back end ... by amelius on Tuesday May 17, 2016 @02:48PM (#11716221)

Are the transactions optimistic? How does the logic that concurrently applies/rolls-back these transactions over multiple clients work? I'm very interested in this, do you have some internal documentation on it?

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Re:Horizon 1.0: a realtime, open-source JavaScript back end ... by coffeemug on Tuesday May 17, 2016 @02:53PM (#11716267)

Take a look at this comment: https://news.ycombinator.com/item?id=11716145. TL;DR: currently not optimistic but will be soon; it's fairly simple to do because RethinkDB core has built in support for it. Once the feature lands we'll talk about the implementation in detail.

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Re:Horizon 1.0: a realtime, open-source JavaScript back end ... by amelius on Tuesday May 17, 2016 @03:56PM (#11716823)

Okay I can wait :)

But without optimistic transactions, what sets Horizon apart from just running the transaction-code on the server? If I understand it correctly, the latency will be the same in both cases, i.e., one network round-trip.

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Re:Horizon 1.0: a realtime, open-source JavaScript back end ... by coffeemug on Tuesday May 17, 2016 @04:16PM (#11717022)

Ease of use.

Lack of optimistic updates is a temporary state, though. The vision for Horizon definitely includes this functionality, and we'll make sure it lands ASAP.

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