clintropolis opened a new pull request, #19671: URL: https://github.com/apache/druid/pull/19671
### Description This PR finishes the partial load rules by wiring the partial load specs up to the segment cache, allowing historicals in virtual storage mode to eagerly load and pin parts of segments to the cache, while allowing the rest of the segment to still be loaded on demand (and evicted). This PR works by storing partial segment cache entries as weak entries, but with an additional 'rule' hold on all parts that are specified by a partial load rule/spec. It takes an imo nicer approach than #19657 which tried to store the rule specified bundles as 'static' cache entries and added a lot of additional complexity for transitions for rule changes. changes: * partial load rules/specs are now wired up to the segment cache when virtual storage mode and partial loads are enabled, allowing eager loading of parts of segments which are pinned in the cache until dropped * when under a partial load spec, partial segment cache entries are still added to the cache as weak entries, but with an additional set of 'rule' holds on all required bundles * partial load spec changes operate on a delta, dropping the rule holds for bundles no longer pinned, and loading and adding new rule holds on things which should be pinned -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
