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> By working with CockroachDB, we expect to be able to operate multiple active data centers – all perfectly synchronised with each other ... > Outside of Goog
by jjirsa 9y ago
> By working with CockroachDB, we expect to be able to operate multiple active data centers – all perfectly synchronised with each other
...
> Outside of Google, there is no solution like this available anywhere
Cassandra offers cross WAN, multi-DC strong consistency so the “no solution exists” line is nonsense. I built geo-aware, cross DC gaming platforms for ps3/x360 on Cassandra in 2009.
Unless this is another fun twist on words where they’re pretending like they’re beating CAP like how google asserts that their network is sufficiently reliable that partitions become a nonfactor, but of course the wording is a PR so who knows what they actually mean.
- state_machine 9y agoFWIW, CockroachDB doesn't claim to beat CAP: https://www.cockroachlabs.com/blog/limits-of-the-cap-theorem https://www.cockroachlabs.com/blog/limits-of-the-cap-theorem
- mjibson 9y agoThere were Jepsen tests done on Cassandra a few years ago: https://aphyr.com/posts/294-jepsen-cassandra https://aphyr.com/posts/294-jepsen-cassandra that showed various failures. Some of these haven't been fixed yet: https://news.ycombinator.com/item?id=13592269 https://news.ycombinator.com/item?id=13592269. So I think it's safe to claim that Cassandra doesn't offer strong consistency.
- deleted 9y ago[deleted]