WebSep 22, 2024 · 在 Redis 2.6.12 版本之后，Redis 支持原子命令加锁，我们可以通过向 Redis 发送 「set key value NX 过期时间」 命令，实现原子的加锁操作。. 比如某个客户端想要获取一个 key 为 niceyoo 的锁，此时需要执行 「set niceyoo random_value NX PX 30000」 ，在这我们设置了 30 秒的锁 ... WebJun 1, 2016 · If I try to save this value of my database I see the same date but with .127 millisecond. Assuming that you're saving to an SQL database as a datetime this is the …
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WebThe only difference is that the time provided is in milliseconds. PSETEX key millisecond value. In the example below, we are storing the stock price of Amazon with 20,000 milliseconds as the expiry time. Instead of using the PSETEX command, we can also use the SET command with the PX option as shown below. SET key value PX milliseconds WebApr 10, 2024 · 1. 单键值. 设置指定 key 的值: set key value. 获取指定 key 的值: get key. 可选参数: set key value [NX XX] [GET] [EX seconds PX millisedonds EXAT unix-time-seconds PXAT unix-time-milliseconds KEEPTTL] 1. NX: 键不存在的时候设置键值, 若键存在时返回 nil. XX: 键存在的时候设置键值. plumbing supplies in nottingham
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The SETcommand supports a set of options that modify its behavior: 1. EX seconds-- Set the specified expire time, in seconds. 2. PX milliseconds-- Set the specified expire time, in milliseconds. 3. EXAT timestamp-seconds-- Set the specified Unix time at which the key will expire, in seconds. 4. PXAT timestamp … See more Simple string reply: OK if SETwas executed correctly. Null reply: (nil) if the SET operation was not performed because the user specified the NX or XXoption but … See more Note: The following pattern is discouraged in favor of the Redlock algorithmwhich is only a bit more complex to implement, but offers better guarantees and is fault … See more Web127.0.0.1:6379> set myKey "hello" it displays (error) ERR unknown command 'set' if I type 127.0.0.1:6379> help set it displays SET key value [EX seconds] [PX milliseconds] … Web一、Redis常用命令. 设置键的值 语法：set key value [ex seconds] [px seconds] [nx xx] 选项： ex seconds:给键设置秒级的过期时间; px milliseconds:给键设置毫秒级的过期时间; nx：当键不存在时才能设置成功，用于新增; xx：当键存在时才设置成功，用于更新; 新增一个键name并设置值： 127.0.0.1:6379> set name jingjing OK plumbing supplies in penrith nsw