dump_data_dir() checkpoints the database and writes the current data directory into a tar archive.

let db = pglite::PGlite::open("./data").await?;
db.dump_data_dir("./backup.tar").await?;
db.close().await?;

Restore into a directory before opening it:

pglite::PGlite::restore_data_dir("./backup.tar", "./restored")?;
let db = pglite::PGlite::open("./restored").await?;

The restore helper removes postmaster.pid after unpacking.

Operational notes

• Dump while the database handle is open.
• Close or drop clients before replacing a live data directory.
• Keep feature compatibility in mind. For example, an ICU-initialized data directory needs an ICU-capable build.