dotnet/orleans
Dec 2024 – Mar 2025
2 Months active
Languages Used
C#
Technical Skills
CassandraCloud NativeConfiguration ManagementDistributed SystemsNoSQLBackend Development
dmorganMsft
PROFILE
Dmorganmsft
Dan Morgan contributed to the dotnet/orleans repository by developing an optional TTL-based cleanup mechanism for Cassandra membership tables, enabling automatic removal of obsolete silo entries and improving cluster hygiene for Cassandra-backed deployments. He implemented this feature using C# and leveraged Cassandra’s default_time_to_live configuration, exposing it as an option for newly created tables. In addition, Dan addressed startup performance degradation by optimizing the IAmAlive write path, switching from cluster-wide LWT to LocalSerial when TTL is enabled, which reduced startup latency and improved reliability. His work demonstrated depth in backend development, distributed systems, and performance optimization within cloud-native environments.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
2Total
Bugs
1
Commits
2
Features
1
Lines of code
405
Activity Months2
Your Network
4215 people
Work History
March 2025
1 Commits
Mar 1, 2025Monthly performance summary for 2025-03 (dotnet/orleans): Implemented a targeted performance optimization for silo startup by adjusting IAmAlive writes TTL path from cluster-wide LWT to LocalSerial when TTL is configured, addressing startup degradation. This change, aligned with the Cassandra TTL behavior update (#9371) and committed as 25a2da73680bfe4edd109c101c733db9bf315967, reduces startup latency and improves startup reliability during scale-out. Business value includes faster time-to-ready for services relying on Orleans silos, improved predictability under TTL configurations, and enhanced stability of fleet deployments. Technologies demonstrated include Cassandra TTL behavior, TTL path optimization, LocalSerial usage, Orleans internals, .NET performance practices, and disciplined code reviews and commit traceability.
1 Commits
Mar 1, 2025Monthly performance summary for 2025-03 (dotnet/orleans): Implemented a targeted performance optimization for silo startup by adjusting IAmAlive writes TTL path from cluster-wide LWT to LocalSerial when TTL is configured, addressing startup degradation. This change, aligned with the Cassandra TTL behavior update (#9371) and committed as 25a2da73680bfe4edd109c101c733db9bf315967, reduces startup latency and improves startup reliability during scale-out. Business value includes faster time-to-ready for services relying on Orleans silos, improved predictability under TTL configurations, and enhanced stability of fleet deployments. Technologies demonstrated include Cassandra TTL behavior, TTL path optimization, LocalSerial usage, Orleans internals, .NET performance practices, and disciplined code reviews and commit traceability.
March 2025
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024: Delivered optional TTL-based cleanup for Cassandra membership tables in Orleans, enabling automatic pruning of defunct silo entries by leveraging Cassandra TTL. The feature targets newly created membership tables and is exposed via a configurable option to enable TTL cleanup, improving cluster hygiene for Cassandra-backed deployments.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024: Delivered optional TTL-based cleanup for Cassandra membership tables in Orleans, enabling automatic pruning of defunct silo entries by leveraging Cassandra TTL. The feature targets newly created membership tables and is exposed via a configurable option to enable TTL cleanup, improving cluster hygiene for Cassandra-backed deployments.
Activity
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Quality Metrics
Correctness85.0%
Maintainability80.0%
Architecture85.0%
Performance90.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C#
Technical Skills
Backend DevelopmentCassandraCloud NativeConfiguration ManagementDatabase ManagementDistributed SystemsNoSQLPerformance Optimization
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