apache/skywalking

This system is a distributed observability and monitoring backend, specifically the Apache SkyWalking OAP server, designed to ingest, analyze, and store telemetry data including traces, metrics, and logs. It provides comprehensive analysis capabilities for various data sources such as eBPF, browser, and GenAI, while supporting dynamic configuration and hot-reloadable rule engines for real-time processing. The architecture emphasizes scalability through cluster coordination, multi-backend storage, and flexible export mechanisms to external systems.

The OAP server underwent a comprehensive architectural overhaul, introducing a modular, plugin-based framework with a new module manager and provider system. This period also established a robust dynamic configuration system supporting multiple backends like Nacos, Apollo, and etcd, alongside a unified remote communication layer for internal node coordination.

100 changes

This period focused on expanding the OAP server's capabilities to support continuous and async profiling, browser observability, and a new metering system for metrics. The team also introduced new data sources for events, Zabbix, and Kafka, while refactoring the core storage and analysis engines to support these new data types.

78 changes

The codebase underwent a major architectural shift by replacing the Groovy-based LAL and MAL engines with a new v2 implementation using ANTLR4 and Javassist for improved performance and hot-update capabilities. Concurrently, the system significantly expanded its observability scope by introducing comprehensive support for eBPF, pprof, and async profiling, alongside new data sources like Telegraf and AWS Firehose.

91 changes

apache/skywalking 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.