MongoDB 3.4.0-rc3

#1

Post by aphyr » Tue, Feb 07, 2017, 4:21 PM UTC

Re: MongoDB 3.4.0-rc3

#2

Post by kenwalger » Tue, Feb 07, 2017, 4:31 PM UTC

MongoDB 3.4 passes the rigorous and tough Jepsen test. Jepsen designs tests to make databases fail in terms of data consistency, correctness, and safety... MongoDB 3.4 passed through their newest tests.

I think that this really shows how mature of a Database MongoDB is.

Re: MongoDB 3.4.0-rc3

#3

Post by metheus » Tue, Feb 07, 2017, 5:03 PM UTC

I hadn't noticed this before, but aphyr has an elaborate and articulate ethics policy: http://jepsen.io/ethics

I like it.

Re: MongoDB 3.4.0-rc3

#4

Post by siscia » Tue, Feb 07, 2017, 5:11 PM UTC

kenwalger wrote: post #2

MongoDB 3.4 passes the rigorous and tough Jepsen test. Jepsen designs tests to make databases fail in terms of data consistency, correctness, and safety... MongoDB 3.4 passed through their newest tests. I think that this really shows how mature of a Database MongoDB is.

> In addition, we show that the new v1 replication protocol has multiple bugs, allowing data loss in all versions up to MongoDB 3.2.11 and 3.4.0-rc4. While the v0 protocol remains broken, patches for v1 are available in MongoDB 3.2.12 and 3.4.0, and now pass the expanded Jepsen test suite.

Wait, it is me not understanding what the abstract is trying to say?

Re: MongoDB 3.4.0-rc3

#5

Post by tptacek » Tue, Feb 07, 2017, 5:12 PM UTC

metheus wrote: post #3

I hadn't noticed this before, but aphyr has an elaborate and articulate ethics policy: http://jepsen.io/ethics I like it.

It's really good. I feel like a lot of security consulting shops could benefit from it as well.

Re: MongoDB 3.4.0-rc3

#6

Post by untog » Tue, Feb 07, 2017, 5:14 PM UTC

kenwalger wrote: post #2

MongoDB 3.4 passes the rigorous and tough Jepsen test. Jepsen designs tests to make databases fail in terms of data consistency, correctness, and safety... MongoDB 3.4 passed through their newest tests. I think that this really shows how mature of a Database MongoDB is.

> I think that this really shows how mature of a Database MongoDB is.

Or that it took this long for them to pass basic proficiency tests. How do other database systems fare with these tests?

Re: MongoDB 3.4.0-rc3

#7

Post by wslh » Tue, Feb 07, 2017, 5:15 PM UTC

siscia wrote: post #4

kenwalger wrote: post #2

MongoDB 3.4 passes the rigorous and tough Jepsen test. Jepsen designs tests to make databases fail in terms of data consistency, correctness, and safety... MongoDB 3.4 passed through their newest tests. I think that this really shows how mature of a Database MongoDB is.

> In addition, we show that the new v1 replication protocol has multiple bugs, allowing data loss in all versions up to MongoDB 3.2.11 and 3.4.0-rc4. While the v0 protocol remains broken, patches for v1 are available in MongoDB 3.2.12 and 3.4.0, and now pass the expanded Jepsen test suite. Wait, it is me not understanding what the abstract is trying to say?

I can only think that the article was a bit late and the new MongoDB version has the last word. Beyond this, the article is extremely valuable and it is mandatory to upgrade your MongoDB.

Re: MongoDB 3.4.0-rc3

#8

Post by ealexhudson » Tue, Feb 07, 2017, 5:15 PM UTC

siscia wrote: post #4

kenwalger wrote: post #2

MongoDB 3.4 passes the rigorous and tough Jepsen test. Jepsen designs tests to make databases fail in terms of data consistency, correctness, and safety... MongoDB 3.4 passed through their newest tests. I think that this really shows how mature of a Database MongoDB is.

> In addition, we show that the new v1 replication protocol has multiple bugs, allowing data loss in all versions up to MongoDB 3.2.11 and 3.4.0-rc4. While the v0 protocol remains broken, patches for v1 are available in MongoDB 3.2.12 and 3.4.0, and now pass the expanded Jepsen test suite. Wait, it is me not understanding what the abstract is trying to say?

It's saying it was fixed in the final 3.4.0 release (or, maybe, that there's at least a patch available) for the v1 protocol, but that the v0 protocol is unfixable - so, 3.4.0 + V1 protocol and it's solid.

Giving aphyr some money to do this makes me think much more of Mongo now; I wouldn't previously have considered it for serious use but this is an excellent demonstration of intent.

Re: MongoDB 3.4.0-rc3

#9

Post by jhugg » Tue, Feb 07, 2017, 5:15 PM UTC

kenwalger wrote: post #2

MongoDB 3.4 passes the rigorous and tough Jepsen test. Jepsen designs tests to make databases fail in terms of data consistency, correctness, and safety... MongoDB 3.4 passed through their newest tests. I think that this really shows how mature of a Database MongoDB is.

Note it’s not really “The Jepsen Test” as the tests are all a bit custom and different. Sometimes they’re looking to validate different claims.

For example, Kyle integrated some serializability tests into the VoltDB Jepsen testing that wouldn’t apply to Mongo.

Re: MongoDB 3.4.0-rc3

#10

Post by pvg » Tue, Feb 07, 2017, 5:16 PM UTC

kenwalger wrote: post #2

MongoDB 3.4 passes the rigorous and tough Jepsen test. Jepsen designs tests to make databases fail in terms of data consistency, correctness, and safety... MongoDB 3.4 passed through their newest tests. I think that this really shows how mature of a Database MongoDB is.

It's great that they're serious and committing resources to passing these tests. They just did, though, after nearly a decade of development. Which is terrific but it doesn't really show the 'how mature of a database MongoDB is'.