Alibaba Cloud Tair vs Caffeine

Alibaba Cloud Tair is a cloud database service for applications that need high-throughput, low-latency operations using the Redis protocol. It supports strings, lists, sets, sorted sets, hashes, streams, transactions, and Pub/Sub, with standalone, master-replica, cluster, and read/write-splitting architectures. The product page describes compatibility with multiple open-source Redis versions and migration without application code changes, plus online scaling without downtime and point-in-time recovery accurate to the second. Additional structures include distributed locks, multidimensional leaderboards, sliding windows, and JSON file storage. Its management platform monitors CPU, memory, connections, and disk use, with alerts, audit logs, and diagnostic reports. Security options include IP whitelists, VPC access, TLS in transit, transparent RDB encryption, and backups. Integrations include OpenAPI, Alibaba Cloud SDKs, CLI, and Resource Orchestration Service; SDKs are listed for Java, C#, Go, Python, Swift, TypeScript, PHP, and C++. New users can access either listed 30-day, 1 GB RAM trial plan at free.

Caffeine is a free, open-source in-memory caching library for Java, distributed under the Apache License, Version 2.0. It provides an API inspired by Google Guava and can load entries automatically, including asynchronously. Size-based eviction uses configured limits with frequency and recency, while entries can expire according to time since their last access or write. When a stale entry is first requested, Caffeine can refresh it asynchronously. Other functions include weak keys, weak or soft values, removal notifications, writes to external resources, and cache statistics. The project offers JSR-107 JCache, Guava adapters, and a simulation extension, with community integrations listed for Spring Cache, Play Framework, Micronaut, Quarkus, and Apache Camel. The project directs users to Maven Central and provides Gradle coordinates for the core library and optional extensions. Version 3.x is intended for Java 11 or newer; earlier Java versions use 2.x. Maven Central artifacts are accompanied by GPG and Sigstore signature files according to the security policy.