Cache Architectures¶
Cache refers to a mechanism that uses high-speed memory to temporarily store frequently accessed data or instructions, aiming to improve system performance by reducing data access latency.
Client Side Cache¶
Client-side caching stores web content on the user's device to speed up loading of previously visited pages. This cache is managed by the user's browser and can include HTML, CSS, images, and JavaScript.
Content Delivery Network (CDN)¶
A Content Delivery Network (CDN) is a geographically distributed network of data centers and proxy servers that delivers web content and media efficiently. Requests are served by the nearest data center, reducing latency and improving user experience.
- Improved loading times
- Increased availability and redundancy
- Reduced bandwidth costs
- Enhanced security
Cloud Services¶
Azure - Azure CDN - Azure Front Door
AWS - AWS CloudFront - AWS Global Accelerator
Messaging Cache Systems (Queue)¶
Messaging systems like RabbitMQ or Apache ActiveMQ act as temporary data buffers in distributed systems, allowing asynchronous communication and improving performance.
- Temporary storage for updates
- Caching messages in memory for faster delivery
Cloud Services¶
Azure - Azure Queue Storage - Azure Event Hubs - Azure Service Bus - Azure Redis Cache
AWS - Amazon SQS - Amazon Kinesis - AWS ElastiCache
Disk-based Cache Systems¶
Disk-based cache systems use disk storage for caching data, providing larger capacity at lower cost. Useful for caching large amounts of data and persisting cache across restarts.
- Database query cache
- Key-value stores with disk persistence (Redis, RocksDB)
Cloud Services¶
Azure - Azure SQL Database Read Scale-Out - Azure Redis Cache
AWS - Amazon RDS Read Replicas - AWS ElastiCache
Distributed Cache¶
A distributed cache spreads operations among multiple nodes, pooling memory resources for high-load applications. It provides high availability and redundancy.
Cloud Services¶
Azure - Azure Cache for Redis - Azure Managed Instance for Apache Cassandra
AWS - Amazon ElastiCache - Amazon DynamoDB DAX
Full Text Search Index¶
Full-text search caches store results of search queries for faster retrieval. Dedicated search services handle full-text search, while caching services store query results.
Cloud Services¶
Azure - Azure Cognitive Search - Azure Cache for Redis - Azure Cosmos DB
AWS - Amazon ElasticSearch Service - ElastiCache
Database Cache¶
Database caching uses memory to store frequently accessed data, improving performance and reliability.
- Write-Ahead Log (WAL)
- Buffer Pool
- Materialized Views
- Transaction Logs
- Replication Logs
Cloud Services¶
Azure - Azure SQL Database - Azure Database for MySQL and PostgreSQL - Azure Cosmos DB
AWS - Amazon RDS - Amazon Aurora - Amazon DynamoDB
Popular Cache Products¶
Redis¶
Redis is an open-source, in-memory data structure store used as a database, cache, and message broker. It supports various data structures, persistence, replication, transactions, Lua scripting, and pub/sub capabilities.
ElastiCache¶
Amazon ElastiCache is a managed in-memory data store supporting Redis and Memcached. It provides high-speed access, scaling, high availability, security, and integration with AWS services.
Memcached¶
Memcached is a high-performance distributed memory object caching system. It is a simple key-value store, effective for caching small data chunks, and uses LRU caching