milvus-io/milvus v2.6.3

milvus-2.6.3

on GitHub

v2.6.3

Release date: October 11, 2025

We are pleased to announce the release of Milvus 2.6.3, which introduces a variety of exciting new features, improvements, and critical bug fixes. This version enhances system performance, expands functionality, and fixes key issues, providing a more stable experience for all users. Below are the highlights of this release:

New Features

• Primary Key with AutoID Enabled: Users can now write the primary key field when autoid is enabled. (#44424 #44530)
• Manual Compaction for L0 Segments: Added support for manually compacting L0 segments. (#44440)
• Cluster ID Encoding in AutoID: Auto-generated IDs will now include the cluster ID. (#44471)
• gRPC Tokenizer Support: Integration of gRPC tokenizer for enhanced query flexibility. (#41994)

Improvements

• Refined the balance checker by implementing a priority queue, improving task distribution. (#43992)
• Preloaded BM25 stats for sealed segments and optimized serialization. (#44279)
• Nullable fields can now be used as input for BM25 functions. (#44586)
• Added support for Azure Blob Storage in Woodpecker. (#44592)
• Purged small files right after Woodpecker segment compaction. (#44473)
• Enabled random score functionality for boosting queries. (#44214)
• New configuration options for the int8 vector type in autoindexing. (#44554)
• Added parameter items to control hybrid search requery policy. (#44466)
• Added support for controlling the insertion of function output fields. (#44162)
• The decay function now supports configurable score merging for better performance. (#44066)
• Improved the performance of binary search on strings. (#44469)
• Introduced support for sparse filters in queries. (#44347)
• Various updates to enhance tiered index functionality. (#44433)
• Added storage resource usage tracking for scalar and vector searches. (#44414 #44308)
• Add storage usage for delete/upsert/restful (#44512)
• Enabled granular flush targets for flushall operations. (#44234)
• Datanodes will now use a non-singleton file system for better resource management. (#44418)
• Added configuration options for batch processing in metadata. (#44645)
• Error messages now include the database name for better clarity. (#44618)
• Moved tracer test to the milvus-common repository for better modularization. (#44605)
• Moved C API unit test files aside to src directory for better organization. (#44458)
• Go SDK now allows users to insert primary key data if autoid is enabled. (#44561)

Bug fixes

• Resolved CVE-2020-25576 and WS-2023-0223 vulnerabilities. (#44163)
• Fixed an issue where logical resources were used for metrics in the quota center on streaming nodes. (#44613)
• Set mixcoord in activatefunc when enabling standby. (#44621)
• Removed redundant initialization of storage V2 components. #44597)
• Fixed compaction task blocking due to executor loop exit. (#44543)
• Refunded loaded resource usage in the insert/deleterecord destructor. (#44555)
• Fixed an issue where the replicator could not stop and enhanced the replicate config validator. (#44531)
• Set mmap_file_raii_ to nullptr when mmap is disabled. (#44516)
• Made diskfilemanager use the file system from the context. (#44535)
• Forced virtual host for OSS and COS in storage V2. (#44484)
• Set report_value default value when extrainfo is not nil for compatibility. (#44529)
• Cleaned up collection metrics after dropping collections in rootcoord. (#44511)
• Fixed segment loading failure due to duplicate field mmap.enable properties. (#44465)
• Fixed load config parsing errors for dynamic replicas. (#44430)
• Handled row-to-column input for dynamic columns in Go SDK. (#44626)