SQLite (“see-quell-lite”) is a lightweight Sequel, or Structured Query Language (SQL), database engine. Instead of using the client-server

SQLite in production with WAL 🔥

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2021-05-21 18:30:07

SQLite (“see-quell-lite”) is a lightweight Sequel, or Structured Query Language (SQL), database engine. Instead of using the client-server database management system model, SQLite is self-contained in a single file. It is library, database, and data, all in one package.

For certain applications, SQLite is a solid choice for a production database. It’s lightweight, ultra-portable, and has no external dependencies. Remember when MacBook Air first came out? It’s nothing like that.

If your application can benefit from SQLite’s serverless convenience, you may like to know about the different modes available for managing database changes.

POSIX system call fsync() commits buffered data (data saved in the operating system cache) referred to by a specified file descriptor to permanent storage or disk. This is relevant to understanding the difference between SQLite’s two modes, as fsync() will block until the device reports the transfer is complete.

For efficiency, SQLite uses atomic commits to batch database changes into a single transaction. This enables the apparent writing of many transactions to a database file simultaneously. Atomic commits are performed using one of two modes: a rollback journal, or a write-ahead log (WAL).

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