varnishcache/varnish-cacheArchived

Features

• HTTP Reverse Proxies - Functions as a high-performance reverse proxy that intercepts traffic to protect and optimize backend origin servers.
• Domain Specific Languages - Transforms a specialized domain language into machine code to execute request processing logic at line rate.
• Cache Invalidation Tags - Groups cached content using metadata tags to enable targeted purging of multiple related objects simultaneously.
• In-Memory Response Caches - Stores HTTP responses in a high-performance memory pool to minimize disk I/O and reduce delivery latency.
• Edge Content Distribution - Manages request and response processing at the network edge to optimize delivery and normalize incoming traffic.
• Custom Request Logic Execution - Defines custom logic for processing requests and responses using a specialized configuration language.
• HTTP Traffic Management - Manages backend request routing, implements rate limiting, and isolates unhealthy origin servers to ensure stability.
• Edge Proxies - Acts as a network edge proxy that optimizes HTTP traffic through request routing and header normalization.
• Traffic Routing - Directs incoming network traffic to specific origin servers using dynamic configurations and proxy logic.
• Dynamic Routing - Proxies network traffic to specific origin servers based on real-time configuration and request metadata.
• Web Traffic Accelerators - Optimizes network paths and reduces latency between clients and backends to accelerate overall website performance.
• Compiled Configuration Languages - Uses a specialized compiled language to define high-performance request handling and caching logic.
• Configuration Compilations - Executes complex request and response logic at line rate using a compiled configuration language.
• SSL/TLS Termination - Handles the decryption of secure HTTPS connections at the proxy layer before forwarding traffic to backend servers.
• Programmable Configurations - Defines custom rules for handling requests and caching responses using a compiled, programmable configuration language.
• Upstream Health Monitoring - Tracks error thresholds for upstream servers to automatically isolate unhealthy backends and prevent serving broken content.
• Response Caching - Stores backend responses in a high-performance memory pool to reduce origin server load and improve delivery speed.
• Backend Health Isolation - Automatically marks and isolates unhealthy backend servers based on error thresholds to ensure service reliability.
• Request Body Hashing - Calculates unique identifiers based on payload content to include request bodies in cache lookup keys.
• URL Query Parameter Normalization - Improves cache hit rates by filtering, sorting, and removing redundant query parameters from incoming URLs.
• Cloud Native Infrastructure - Enables scalable caching infrastructure deployment within cloud-native environments using containers and Kubernetes orchestration.
• Request Rate Limiting - Restricts the frequency of requests based on client IP addresses or specific headers to prevent server overload.
• Routing Extension Modules - Adds specialized processing capabilities through optional plugins that provide extra feature sets for the proxy.
• Plugin-Based Extensibility - Integrates optional modules into the processing pipeline to add specialized capabilities like geolocation or JSON parsing.
• HTTP Content Negotiation - Sanitizes Accept and Accept-Language headers to reduce unnecessary cache variations during content negotiation.
• Caching - HTTP accelerator designed for content-heavy dynamic web sites.
• Networking and Load Balancing - High-performance HTTP accelerator and caching proxy.

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