v1.13: Dumpless upgrades

[guimachiavelli]

v1.13 introduces a new experimental CLI flag: --experimental-dumpless-upgrade. Using it simplifies the upgrading process, allowing people to simply update the binary and launch Meilisearch instead of having to generate dumps.

This feature is only publicly relevant for self-hosted users. It may also be useful for the cloud, but this would be an internal change without any visibility for customers.

New update process:

1. download new binary
2. interrupt meilisearch
3. overwrite old binary
4. relaunch with ./meilisearch --experimental-dumpless-upgrade

Warning

The dumpless upgrade is not currently atomic, so it's possible some processes fail and Meilisearch still finalizes the upgrade. If this happens, it may corrupt the database. Users should take a snapshot of their db before performing a dumpless upgrade.

Cloud updates remain the same: press update button.

Tasks

• update learn/self_hosted/configure_meilisearch_at_launch.mdx
• update learn/update_and_migration/updating.mdx

References

• SME: @irevoire
• Engine issue: Dumpless upgrade meilisearch#5162
• Changes summary: https://meilisearch.notion.site/Dumpless-upgrade-fff4b06b651f81f1acafe24d4687b3f7