sqlite-readers-writers
rsqlite3
sqlite-readers-writers | rsqlite3 | |
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1 | 1 | |
1 | 154 | |
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10.0 | 1.8 | |
over 1 year ago | over 2 years ago | |
Rust | Rust | |
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sqlite-readers-writers
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In pursuit of the best value US cloud provider
This has been posted and reposted continuously for a year and I still don’t understand the comparisons in the article. Either use SQLite across the board or use MySQL/Postgres across the board. Or do both. You can even model a self-managed rdbms install on the clouds that don’t have that turnkey offering. But mixing and matching makes no sense.
I’m a huge fan of SQLite and have open sourced some .NET stuff around it (eg https://github.com/neosmart/AspSqliteCache ) but learned a very expensive mistake in using it for an ASP.NET Core Project with the default pattern (i.e. with EF Core).
SQLite locks (tables or the entire db depending on configuration) upon write. If you use shared cache mode and WAL you can get very far with one write thread and many competing reads - depending on shared cache mode, WAL, and other options. I benchmarked the different configurations with one or more writing threads here to show how it scales: https://github.com/mqudsi/sqlite-readers-writers
But this approach is hard to model with EF Core. If you use the default request-scoped DI injected connection, you risk any writes upgrading the read lock to a write lock for the duration of the request. The better approach is to use the default request-scoped connection for RO operations and then request a scoped/transient DI connection for any write ops, but copying internal EF entity tracking state from one EF instance to another is tedious and fraught with issues. You’re at least able to work around this if you try to always keep in mind write transaction lifetimes, though.
The problem comes as soon as you need a “background service” in the sense of “an operation running independently of requests and parallel to them.” If that service needs a write lock for any amount of time, you’re suddenly going to be seeing write timeouts (since default behavior is to poll repeatedly until a write lock is obtained) and that is pretty much impossible to fix.
As one of the biggest advantages of using a resident executor like .NET or Java vs a per-request stateless option like PHP is that you can do stuff independent of requests, SQLite is tricky to use correctly in prod in this model.
The good news is that if you use the SQLite EF provider and run into this, it’s usually not too hard to switch to a real DB provider as a lot of the work is abstracted.
rsqlite3
What are some alternatives?
vfsstat.rs - Example sqlite3 Dynamic Loadable Extension in Rust - vfs and vtab modules - port of vfsstat.c
tauri - Build smaller, faster, and more secure desktop applications with a web frontend.
SqliteCache for ASP.NET Core - An ASP.NET Core IDistributedCache provider backed by SQLite
turbosql - An easy local data persistence layer for Rust, backed by SQLite.
rusqlite-model - Model trait and derive implementation for rusqlite
7XX-rfc - An RFC for a new series of HTTP status codes covering developer fouls.
sea-query - đź”± A dynamic SQL query builder for MySQL, Postgres and SQLite
embed-c - Embed C code at compile time inside Rust using C2Rust
doteur - Tool to automate the visualisation of SQL schemas from a SQL file
mycelite - Mycelite is a SQLite extension that allows you to synchronize changes from one instance of SQLite to another.