CASSANDRA-21147 - Direct IO support for Cursor Compaction#4606
Open
samueldlightfoot wants to merge 1 commit intoapache:trunkfrom
Open
CASSANDRA-21147 - Direct IO support for Cursor Compaction#4606samueldlightfoot wants to merge 1 commit intoapache:trunkfrom
samueldlightfoot wants to merge 1 commit intoapache:trunkfrom
Conversation
samueldlightfoot
force-pushed
the
CASSANDRA-21147-cursor-direct
branch
3 times, most recently
from
fe9e9e6 to
245ac52
Compare
samueldlightfoot
force-pushed
the
CASSANDRA-21147-cursor-direct
branch
3 times, most recently
from
b6f0cb2 to
ef6f3f0
Compare
This change wires DiskAccessMode through cursor-based compaction, enabling direct I/O reads for cursor compaction to match the existing support in the iterator-based compaction path. Key changes: - Thread DiskAccessMode from DatabaseDescriptor.getCompactionReadDiskAccessMode() through CursorCompactor, StatefulCursor, and SSTableCursorReader - Consolidate SSTableReader's openDataReader/openDataReaderForScan variants into a unified openDataReaderInternal with canReuseDfile guard - Fix DirectThreadLocalReadAheadBuffer.cleanBuffer() to clean the backing buffer rather than the aligned slice - Ensure SSTable scanners are closed before opening cursor readers (resolving readahead buffer interference and excessive fd usage)
samueldlightfoot
force-pushed
the
CASSANDRA-21147-cursor-direct
branch
from
ef6f3f0 to
0d16207
Compare
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary:
Wire compaction_read_disk_access_mode through cursor compaction to enable direct IO reads, matching the existing support in the iterator-based compaction path.
Changes:
patch by Sam Lightfoot reviewed by for CASSANDRA-21147