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by seanmcdirmid
4801 days ago
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I don't think Brewer is stating an opinion, rather a fact. Nor is it very surprising. I'm sure banks have huge IT operations where parts rely on ACID or BASE depending on need. But any massive distributed system can't really expect ACID to work very well. I'm pretty sure "eventual consistency" doesn't mean "eventual inconsistency" under any reasonable interpretation. |
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As for the eventual inconsistency remark, this is from the original authors of Cassandra at Facebook. They did not extend the use of Cassandra because node flaps and packet losses caused nodes to be inconsistent and have old data. Bringing that data back up to date was very difficult, since the anti-entropy algorithms were too expensive to run frequently. They also found that the R=W=2 was too costly in terms of performance, and well you know the rest :-)