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Alcor v0.19-alpha
Pre-release
Pre-release
Release Summary
This release focuses solely on performance and scalability improvement on agent, controller and agent-controller communication.
Some highlight of the v0.19-alpha release:
- Deliver ACA ovs-driver v2.0 with 100-1000x latency and scalability improvement to support one-million ports per VPC.
- Reduce latency of new on-demand workflows by 70% with various optimizations on messaging and multi-threading modes.
- Improve port api throughout by 60% and achieve up to 16x throughout gain compared to Neutron at performance tipping point.
- Deliver routing policy feature and complete e2e integration.
- Onboard Alcor distributed tracing framework enabled by Jaeger/Opentracing for fine-grain performance profiling.
- Introduce daily Jenkins jobs to automate build, deployment and e2e testing (for Alcor and OVS data plane).
- Stabilize code and fix 10+ functionality bugs & 20+ performance bugs.
Features Added
New Features Development
- Alcor Control Agent ovs-driver v2.0 Design & Development
- New diver communication layer to enhance openflow connection/flow control performance (Agent PRs #261)
- Host ip lookup optimization (Agent PR #258)
- Batching and parallel resource state processing for one million OVS flows (Agent PR #264)
- Alcor routing policy and feature E2E integration
- Route Manager supports routing rule update (Controller PR #624 )
- Data Plane Manager supports routing rule update (Controller PR #664)
- Alcor Control Agent supports OVS programming of routing rules (Agent PRs #244, #247, #254, #257)
- API GW onboards Nova-compatible route APIs (Controller PRs #676, #677)
- Alcor Python client and Rally plugin to supports new API perf test (Client PR #1, Alcor Rally PR #1)
- Alcor distributed tracing framework
Alcor Performance & Scalability
- Performance/Scalability report and plan
- gRPC performance analysis and channel optimization for Alcor on-demand workflow (Perf PR #7)
- ACA v2.0 ovs driver refactoring perf report (Perf PR #8)
- ACA goal state processing report for massive L2/L3 neighbor (Perf PR #9)
- Alcor performance test plan (Controller PR #643)
- Controller Performance Design & Improvement
- Design on Alcor database/cache transactions (Controller PR #611)
- Optimize VPC creation of default segment table from 10s to 1s (Controller PR #642)
- Remove RM transactions for a single cache operation (Controller PR #658)
- Optimize cache write latency in NCM to sub-second and reduce up to 90% latency (Controller PR #659)
- Transaction atomicity mode change for microservices (Controller PR #673)
- Fix race condition for Subnet and Port APIs (Controller PR #685)
- Messaging performance improvement
- gRPC channel/stub pool and channel keepalive (Controller PR #637)
- gRPC channel warm-up (Controller PR #670)
- Async gRPC client, cleanup thread and intelligent sleep (Agent PR #241)
- Async gRPC server implementation and thread pool for goal state push (Agent PR #255)
- Adjustable thread pool size based on host core number (Agent PR #256)
- [Backward compatibility] async grpc server gsv1 support (Agent PR #260)
- Message Queue scale path improvement
Alcor Fundamental
- Alcor DevOps and CI/CD enhancement
- Alcor K8s deployment improvement (Controller PRs #622, #672, #675)