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1 Commits (bc34a7eb3c103ae7ab2000da2a6c3925712eb226)
| Author | SHA1 | Message | Date |
|---|---|---|---|
Chris Lu
|
414cda4215
|
fix: S3 versioning memory leak in ListObjectVersions pagination (#7813)
* fix: S3 versioning memory leak in ListObjectVersions pagination This commit fixes a memory leak issue in S3 versioning buckets where ListObjectVersions with pagination (key-marker set) would collect ALL versions in the bucket before filtering, causing O(N) memory usage. Root cause: - When keyMarker was set, maxCollect was set to 0 (unlimited) - This caused findVersionsRecursively to traverse the entire bucket - All versions were collected into memory, sorted, then filtered Fix: - Updated findVersionsRecursively to accept keyMarker and versionIdMarker - Skips objects/versions before the marker during recursion (not after) - Always respects maxCollect limit (never unlimited) - Memory usage is now O(maxKeys) instead of O(total versions) Refactoring: - Introduced versionCollector struct to encapsulate collection state - Extracted helper methods for cleaner, more testable code: - matchesPrefixFilter: prefix matching logic - shouldSkipObjectForMarker: keyMarker filtering - shouldSkipVersionForMarker: versionIdMarker filtering - processVersionsDirectory: .versions directory handling - processExplicitDirectory: S3 directory object handling - processRegularFile: pre-versioning file handling - collectVersions: main recursive collection loop - processDirectory: directory entry dispatch This reduces the high QPS on 'find' and 'prefixList' operations by skipping irrelevant objects during traversal. Fixes customer-reported memory leak with high find/prefixList QPS in Grafana for S3 versioning buckets. * s3: infer version ID format from ExtLatestVersionIdKey metadata Simplified version format detection: - Removed ExtVersionIdFormatKey - no longer needed - getVersionIdFormat() now infers format from ExtLatestVersionIdKey - Uses isNewFormatVersionId() to check if latest version uses inverted format This approach is simpler because: - ExtLatestVersionIdKey is already stored in .versions directory metadata - No need for separate format metadata field - Format is naturally determined by the existing version IDs |
2 weeks ago |