[{"createTime":1735734952000,"id":1,"img":"hwy_ms_500_252.jpeg","link":"https://activity.huaweicloud.com/cps.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=V1g3MDY4NTY=&utm_medium=cps&utm_campaign=201905","name":"华为云秒杀","status":9,"txt":"华为云38元秒杀","type":1,"updateTime":1735747411000,"userId":3},{"createTime":1736173885000,"id":2,"img":"txy_480_300.png","link":"https://cloud.tencent.com/act/cps/redirect?redirect=1077&cps_key=edb15096bfff75effaaa8c8bb66138bd&from=console","name":"腾讯云秒杀","status":9,"txt":"腾讯云限量秒杀","type":1,"updateTime":1736173885000,"userId":3},{"createTime":1736177492000,"id":3,"img":"aly_251_140.png","link":"https://www.aliyun.com/minisite/goods?userCode=pwp8kmv3","memo":"","name":"阿里云","status":9,"txt":"阿里云2折起","type":1,"updateTime":1736177492000,"userId":3},{"createTime":1735660800000,"id":4,"img":"vultr_560_300.png","link":"https://www.vultr.com/?ref=9603742-8H","name":"Vultr","status":9,"txt":"Vultr送$100","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":5,"img":"jdy_663_320.jpg","link":"https://3.cn/2ay1-e5t","name":"京东云","status":9,"txt":"京东云特惠专区","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":6,"img":"new_ads.png","link":"https://www.iodraw.com/ads","name":"发布广告","status":9,"txt":"发布广告","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":7,"img":"yun_910_50.png","link":"https://activity.huaweicloud.com/discount_area_v5/index.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=aXhpYW95YW5nOA===&utm_medium=cps&utm_campaign=201905","name":"底部","status":9,"txt":"高性能云服务器2折起","type":2,"updateTime":1735660800000,"userId":3}]
redis概述
REmote DIctionary
Server(Redis)是一个基于key-value键值对的持久化数据库存储系统。redis和大名鼎鼎的Memcached缓存服务软件很像,但是redis支持的数据存储类型比memcached更丰富,包括strings(字符串),lists(列表),sets(集合)和sorted
sets(有序集合)等。
这些数据类型支持push/pop,add/remove及取交集,并集和差集及更丰富的操作,而且这些操作都是原子性的。在此基础上,redis支持各种不同方式的排序。与memcached缓存服务一样,为了保证效率,数据都是缓存在内存中提供服务。和memcached不同的是,redis持久化缓存服务还会周期性的把更新的数据写入到磁盘以及把修改的操作记录追加到文件里记录下来,比memcached更有优势的是,redis还支持master-slave(主从)同步,这点很类似关系型数据库MySQL主从复制功能。
Redis是一个开源的使用C语言编写(3万多行代码),支持网络,可基于内存亦可持久化的日志型,Key-Value数据库,并提供多种语言的API。从2010年3月15日起,Redis的开发工作由VMware主持。
Redis软件的出现,再一定程度上弥补了memcached这类key-value内存缓存服务的不足,在部分场合可以对关系数据库起到很好的补充作用。redis提供了Python,Ruby,Erlang,PHP客户端,
1.2 redis特点
key-value键值类型存储 支持数据可靠存储及落地 单进程单线程高性能