从Redis的使用者的角度来看，一个Redis节点包含多个database（非cluster模式下默认是16个，cluster模式下只能是1个），而一个database维护了从key space到object space的映射关系。这个映射关系的key是string类型，而value可以是多种数据类型，比如：string, list, ...

系统应对高并发需结合“缓存策略+限流方案”，缓存减少数据库压力，限流防止流量过载，两者协同保障系统稳定性。 主动更新：数据变更时同步更新缓存（如商品价格修改后立即更新Redis）。 过期更新：设置TTL（如1小时），过期后自动从DB加载并更新（适用 ...

Get started with Java streams, including how to create streams from Java collections, the mechanics of a stream pipeline, examples of functional programming with Java streams, and more. You can think ...

Need more villagers for your survival world? In this tutorial, you’ll learn how to build an easy villager breeder farm in Minecraft 1.21+, fully working in both Java and Bedrock Edition. This design ...

Learn how to build an easy automatic cow farm in Minecraft 1.20+ for both Java and Bedrock Edition. This compact survival-friendly design generates cooked beef and leather on autopilot — great for ...

Yes, Java certification is still worth it, but it pays to know which ones will help you stand out. Here's what you need to know about Java course certificates and hiring in 2025. Java, which turns 30 ...

多个业务系统，共用一个redis，还是应该分开。规划好key，特别是前缀，a.b.c.d 如果缓存数据变大了，就可以分区，但注意按业务垂直拆分，避免 key 的冲突。 一般小公司研发团队都是需要申请缓存资源直接得到对应的 ip 地址，但大公司最多只能得到key/token。

The most significant addition to the Java language since Sun Microsystems rewrote the collections API for Java 5 is the introduction of Java records. Java records address two significant pain points ...

Redis, the popular in-memory data store, is switching away from the open source three-clause BSD license. Instead, in a move that is clearly aimed to prevent the large cloud providers from offering ...