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Yes, Ringpop was reference number 8 in the article. It is interesting that https://github.com/uber/ringpop-go says: "This project is no longer under active development"

So the time of Redis has passed but the successor has passed away as well?

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Basically it's been deprecated in favor of using projects that are more mature like Apache Helix (but conversely more operationally intense to get started, requires Zookeeper and a bunch of things on top if you want to use it in a non-Java setting, i.e. with Go).

I've really grown to dislike ZooKeeper. While incredibly useful, it's pretty awful. It's nearly impossible to secure in any non-trivial setup. And it's inane requirement to reserve a physical disk [1] for its transaction log is almost impossible to fulfil with virtualized hardware.

[1] From the manual:

> ZooKeeper's transaction log must be on a dedicated device.

Is this not the assumption of many SQL databases that make certain guarantees about complying with ACID? I'm not a DB expert but feels like something I've read before.

Not since the 1990s

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