Pomelo.EntityFrameworkCore.MySql VS timeflake

EntityFramework uses providers to translate Linq queries into real queries and connect to the datasource and convert the data into .net readable format. The MySQL provider for .NET is the official one but I think it has fallen on hard times and is not developed as much as before. You should probably look at Pomelo, which is a community library for .net core: https://github.com/PomeloFoundation/Pomelo.EntityFrameworkCore.MySql

For MySQL and friends you'll need the Pomelo data provider from https://github.com/PomeloFoundation/Pomelo.EntityFrameworkCore.MySql . Turns out there's an example of using the MySQL provider about halfway down that shows how to, but it is missing the '-o Model' parameter that you'd use to get your database model into a folder called Model.

This approach has become my preferred way of generating IDs for database rows. It is relatively space efficient and doesn't require a round trip to the database to generate an ID like auto increment does.

While working on a C# implementation for MySQL and we found that when the DB uses Little Endian Binary that the GUID must be reversed to store in order:

https://github.com/PomeloFoundation/Pomelo.EntityFrameworkCo...

Yeah, just use a UUID unless the bits to store the UUID really are your driving limitation (they're not), having a UUID that is non-linear is almost always the most straight-forward option for identifying things, for the tradeoff of human readability (though you can get some of that back with prefixes and some other schemes). I'm not going to rehash the benefits that people have brought up for UUIDs, but they're in this thread. At this point what I'm concerned about is just... what is the best kind of UUID to use -- I've recently started using mostly v1 because time relationship is important to me (despite the unfortunate order issues) and v6[0] isn't quite so spread yet. Here's a list of other approaches out there worth looking at

- isntauuid[1] (mentioned in this thread, I've given it a name here)

- timeflake[2]

- HiLo[3][4]

- ulid[5]

- ksuid[6] (made popular by segment.io)

- v1-v6 UUIDs (the ones we all know and some love)

- sequential interval based UUIDs in Postgres[7]

Just add a UUID -- this almost surely isn't going to be what bricks your architecture unless you have some crazy high write use case like time series or IoT or something maybe.

[0]: http://gh.peabody.io/uuidv6/

[1]: https://instagram-engineering.com/sharding-ids-at-instagram-...

[2]: https://github.com/anthonynsimon/timeflake

[3]: https://en.wikipedia.org/wiki/Hi/Lo_algorithm

[4]: https://www.npgsql.org/efcore/modeling/generated-properties....

[5]: https://github.com/edoceo/pg-ulid

[6]: https://github.com/segmentio/ksuid

[7]: https://www.2ndquadrant.com/en/blog/sequential-uuid-generato...

- How long the user took to write the post. This can happen if the app creates the ID when the user starts editing the post and also shares a timestamp of the publication or save time.

- Whether or not the user edited the post after posting it. This can happen if the posts's displayed time doesn't match the timestamp in the ID.

- Whether or not the user prepared the post in advance and set it to post automatically. If the timestamp is very close to a round numbered time like 21:00:00, it was likely posted automatically. If the posting platform does not provide such functionality, then the user must be using some third-party software or custom software to do it. This information can help de-anonymize the user.

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[0] https://github.com/anthonynsimon/timeflake/issues/3

[1] https://firebase.google.com/docs/cloud-messaging/android/cli...

[2] https://www.eff.org/deeplinks/2017/03/five-creepy-things-you...

[3] https://digitalcontentnext.org/wp-content/uploads/2018/08/DC...

[4] https://www.eff.org/deeplinks/2016/08/windows-10-microsoft-b...

[5] https://www.eff.org/deeplinks/2020/11/macos-leaks-applicatio...