Vitastor 3.0.0 released

2025-12-06

A single new feature: the new log-structured metadata store implementation, described in the presentation from Moscow Highload’2025 (check it out here).

It’s now the default store for new OSDs. The support for the old store is also left in place, you can still choose it for new OSDs with vitastor-disk prepare --meta_format 2.

OSDs from previous versions with the old store format will also continue to operate just like before.

Some documentation: atomic_write_size, meta_format.