OpenSearch - March 2026 (2026-03) Monthly Summary: Delivered the Virtual Shard Routing Foundation, establishing a new routing path that uses virtual shard IDs to map to physical shards. Implemented index.number_of_virtual_shards (default -1/disabled), routing changes in OperationRouting.generateShardId, and a VirtualShardRoutingHelper for vShardId resolution. Added per-index overrides via virtual_shards_routing metadata and comprehensive tests covering enabled/disabled routing, validation rules, and override/fallback behavior. Achieved a major improvement in routing flexibility, test coverage, and readiness for upcoming shard movement workstreams.

Sep 2025 highlights for wazuh/wazuh-indexer: Delivered key fixes and policy changes that improve search correctness, stability, and cross-cluster write semantics. The work emphasizes business value through safer query rewriting and robust snapshot restore workflows, with a focus on maintainability and test coverage.

August 2025 monthly summary for wazuh/wazuh-indexer. Focused on architectural enhancements to improve multi-tenant data locality, routing efficiency, and extensibility of the search pipeline. Delivered two major features with strong testing coverage and clear business value: ACL-Aware Routing for Ingest and Search, and QueryPhase Extension Points for Plugins. No high-severity bug fixes recorded this month; emphasis was on delivering reliable, test-covered capabilities and laying the groundwork for future plugin-driven growth.

July 2025 monthly summary for wazuh/wazuh-indexer. Delivered Hierarchical routing processors for ingest and search pipelines, enabling co-location of documents based on hierarchical paths and configurable routing semantics. Implemented HierarchicalRoutingProcessor (ingest) and HierarchicalRoutingSearchProcessor (search) with consistent MurmurHash3-based routing to ensure documents and queries align across stages. Configurable anchor depth, path separators, and field mapping allow tuning for various hierarchies, reducing search latency and cross-shard traffic. The work aligns with performance and scalability goals for hierarchical data indexing.