dotnet/orleans

This system is a distributed actor framework (Orleans) that provides a comprehensive runtime for building scalable, fault-tolerant applications using the actor model. It manages the lifecycle, placement, and communication of virtual actors (grains) across a cluster, supporting various clustering backends like Azure, AWS, and SQL databases. The framework includes built-in features for state persistence, persistent streaming, reminders, and transactional state, alongside extensive tooling for observability, testing, and code generation.

This period focused on modernizing the Orleans framework by introducing comprehensive abstraction layers in Orleans.Core.Abstractions, including new interfaces for lifecycle management, placement strategies, and concurrency control. The work also standardized configuration patterns across Azure, AWS, and ADO.NET providers, while establishing robust infrastructure for distributed transactions, event sourcing, and streaming.

82 changes

This period focused on modernizing the Orleans infrastructure by introducing structured configuration options, validators, and builder extensions for all major storage and streaming providers. The team also overhauled the networking stack, added comprehensive TLS security support, and enhanced the code generator and serialization system to improve developer experience and runtime performance.

78 changes

This period focused on expanding Orleans' distributed storage capabilities by introducing new providers for Redis, Cassandra, Azure Cosmos DB, and ADO.NET, alongside a new log-structured journaling system. The framework also introduced automatic activation repartitioning and load balancing to improve cluster resilience, while refactoring the core serialization pipeline to support JSON and other formats.

61 changes

This period focused on deepening observability by introducing OpenTelemetry-based distributed tracing and comprehensive diagnostic event listeners across Orleans runtime components. Concurrently, the codebase expanded its journaling capabilities with a new JSONL format and associated samples, while also adding deterministic testing infrastructure for reminders and deployment samples for Azure.

9 changes

dotnet/orleans was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point the surveyor at a repository you know and see whether you agree with it.