voidprocessInputBuffer(client*c){while(c->qb_pos<sdslen(c->querybuf)){……// 根据客户端输入缓冲区的命令开头字符判断命令类型if(!c->reqtype){// 符合 RESP 协议的命令if(c->querybuf[c->qb_pos]=='*'){c->reqtype=PROTO_REQ_MULTIBULK;}e
This command allows the client to provide information about itself for possible logging and statistical purposes. All clients SHOULD send this command after connecting to the server. All DICT servers MUST implement this command (note, though, that the server doesn't have to do anything with the ...
say("failed to authenticate: ", err) return endwhere we assume that the Redis server is configured with the password foobared in the redis.conf file:requirepass foobared If the password specified is wrong, then the sample above will output the following to the HTTP client:...
intprocessCommandAndResetClient(client *c){intdeadclient =0; client *old_client = server.current_client; server.current_client = c;if(processCommand(c) == C_OK) { commandProcessed(c); }if(server.current_client ==NULL) deadclient =1;/* * Restore the old client, this is needed because...
* command, arguments are in the client argv/argc fields. * processCommand() execute the command or prepare the * server for a bulk read from the client. * * If C_OK is returned the client is still alive and valid and * other operations can be performed by the caller. Otherwise ...
redis是当前最热门的NoSQL技术之一。 Redis是一个开源(BSD许可)的,内存中的数据结构存储系统,它可以用作数据库、缓存和消息中间件。 它支持多种类型的数据结构,如字符串(strings),散列(hashes),列表(lists),集合(sets),有序集合(sorted sets)与范围查询,bitmaps,hyperloglogs和地理空间(geospatial)索引半径查询。
void *clientData) // cron,定时执行 - void replicationCron(void) // 处理主从复制相关的cron - 判断server.repl_state == REPL_STATE_CONNECT - int connectWithMaster(void) // 链接主节点 - 设置server.repl_state 为 REPL_STATE_CONNECTING; - 设置建立完成回调函数为syncWithMaster函数,核心作用是与主...
redis = Redis.new(reconnect_attempts: 0) redis.subscribe_with_timeout(5, "news") do |on| on.message do |channel, message| # ... end end If no message is received after 5 seconds, the client will unsubscribe. Reconnections By default, this gem will only retry a connection once and...
主节点为从节点保存的状态记录在客户端结构redisClient中的replstate属性中。从主节点的角度看,从节点需要经历的状态分别是:REDIS_REPL_WAIT_BGSAVE_START、REDIS_REPL_WAIT_BGSAVE_END、REDIS_REPL_SEND_BULK和REDIS_REPL_ONLINE。 当主节点收到从节点发来的”SYNC”或”PSYNC”命令,并且需要完全重同步时,将从节点...
server.replid和server.master_repl_offset) // 变成一个cachemaster client // 建立起与新主节点的...