if redis.call("get",KEYS[1])==ARGV[1] then return redis.call("del",KEYS[1]) else return 0 end 1. 2. 3. 4. 5. 接下来,可以给 Lua 脚本求一个 SHA1 和,命令如下: redis-cli -a (这里填密码) -x script load < lua/releasewherevalueequal.lua 1. 结果展示: 然后就在 java 代码里面...
slave-priority 100 # It is possible for a master to stop accepting writes if there are less than # N slaves connected, having a lag less or equal than M seconds. # # The N slaves need to be in "online" state. # # The lag in seconds, that must be <= the specified value, is...
setnx key value, 是set if not exists的意思,如果当前 key 存在,则不作任何操作并且返回 0, 如果当前 key 不存在,则进行 set 操作,并且返回 1. 那么此时的分布式锁流程是: 代码语言:javascript 复制 # 获取锁 setnx key valueif0:放弃if1:成功,做业务操作 # 释放锁 del lock_key 服务宕机 下一个问题来...
V = count_of_zero_registers( registers ) # the number of registers equal to zero if V == 0: # if none of the registers are empty, use the HLL estimate DV = DV_est else: DV = m * log(m/V) # i.e. balls and bins correction if DV_est <= ( 1/30 * 2^32 ): # intermed...
127.0.0.1:6379> CLIENT SETNAME "www.biancheng.net" OK 127.0.0.1:6379> CLIENT GETNAME "www.biancheng.net" 127.0.0.1:6379> CLIENT KILL 127.0.0.1:49502 OK Redis服务器命令 Redis 服务器是对客户端提供服务的主体,只要是安装了 Redis 数据库的计算机都可以通过本地,或者远程的方式对外提供服务。
since: 1.0.0This command is equal to SINTER, but instead of returning the resulting set, it is stored in destination.该命令等于 SINTER,但是不返回结果集,而是存储在目标中。If destination already exists, it is overwritten.如果目的地已经存在,则覆盖它。1.6.2 返回结果集中的元素数 ...
is.not.lessThanOrEqualTo(date).return.all() Searching String Arrays If you have a field type of string[] you can search for whole strings that are in that array: let albums // find all albums where genres contains the string 'rock' albums = await albumRepository.search().where('genres...
# It is possible for a master to stop accepting writes if there are less than # N slaves connected, having a lag less or equal than M seconds. # # N个从机需要处于“在线”状态。 # The N slaves need to be in "online" state. # # 滞后时间(以秒为单位)必须<=指定值,它是从从从机...
(EVENT_ONE_LOOP_FINISHED,function(){redisClient.hget(key,'name',function(err,reply){if(err){returndone(err);}expect(Number(reply)).to.be.equal(LOOP_COUNT);done();});});cmd.on(EVENT_SEND_ERROR,function(err){done(err);});for(vari=0;i<LOOP_COUNT;i++){cmd.addData(key,1,'name...
作为新插入节点下一个节点的起始位置/* We need space for both the length of the previous entry and* the length of the payload. */reqlen+=zipStorePrevEntryLength(NULL,prevlen);reqlen+=zipStoreEntryEncoding(NULL,encoding,slen);/* When the insert position is not equal to the tail, we need...