godzie44 authored 7 months ago and Georgy Moshkin committed 6 months ago

Closes #664

Move vshard related fields from _pico_property to _pico_tier
and adapt it in governor algorithm

We only use Eq ranges

CAS predicates should always contain the current raft term, because this
is what's explicitly checked in proc_cas.

Note that this will sometimes result in a EntryTermMismatch error
because the latest applied entry may have a different term in case the
election has started but not finished yet.

We could add this check to all the client cas precondition checks, but
it's not a big deal, because we handle the situation correctly anyways.

godzie44 authored 8 months ago and Maksim Kaitmazian committed 7 months ago

Closes #682

- add `migration_up` and `migration_down` lua API functions
- now the migration mechanism in plugins takes into account the plugin version and, accordingly, previous applied migrations
- add _pico_plugin_migration system table

Closes #683