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Posted to issues@hbase.apache.org by "VladRodionov (via GitHub)" <gi...@apache.org> on 2026/09/24 23:43:38 UTC

[PR] HBASE-30384 Add dynamic cache sizing support for CacheEngine-based caches [hbase]

VladRodionov opened a new pull request, #8702:
URL: https://github.com/apache/hbase/pull/8702

   ## Summary
   
   Adds dynamic sizing as an explicit capability of the CacheEngine architecture.
   
   This allows native cache engines and legacy BlockCache adapters to expose runtime resizing
   without adding resize operations to every CacheEngine implementation.
   
   ## Changes
   
   * Add `ResizableCacheEngine` extending `CacheEngine` with `setMaxSize(long)`.
   * Make `LruCacheEngine` implement `ResizableCacheEngine`, preserving its existing resize behavior.
   * Add `ResizableBlockCacheBackedCacheEngine` to preserve dynamic sizing when adapting a legacy
     `ResizableBlockCache`.
   * Update `CacheEngines` to select the resizable adapter when the underlying legacy cache implements
     `ResizableBlockCache`.
   * Add tests covering capability preservation and resize delegation.
   
   ## Scope
   
   This change only introduces and preserves the resize capability in the CacheEngine layer.
   
   It intentionally does not migrate `HeapMemoryManager` or `HRegionServer` to use
   `ResizableCacheEngine`. RegionServer cache ownership is still based on the legacy `BlockCache`
   interfaces and will be migrated separately as the CacheAccessService/CacheEngine architecture is
   adopted by the RegionServer.
   
   This keeps the change independent of the larger RegionServer ownership migration while ensuring
   that dynamic sizing capability is not lost during the transition from BlockCache implementations
   to native CacheEngine implementations.


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Re: [PR] HBASE-30384 Add dynamic cache sizing support for CacheEngine-based caches [hbase]

Posted by "petersomogyi (via GitHub)" <gi...@apache.org>.
petersomogyi merged PR #8702:
URL: https://github.com/apache/hbase/pull/8702


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Re: [PR] HBASE-30384 Add dynamic cache sizing support for CacheEngine-based caches [hbase]

Posted by "VladRodionov (via GitHub)" <gi...@apache.org>.
VladRodionov commented on PR #8702:
URL: https://github.com/apache/hbase/pull/8702#issuecomment-5825456311

   This failure is not related to this PR. @taklwu could you please review this PR?


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