ShardedPub/SubinRedis7improvespub/subscalabilitybydistributingmessagetrafficacrossmultiplethreads.TraditionalRedisPub/Subwaslimitedbyasingle-threadedmodelthatcouldbecomeabottleneckunderhighload.WithShardedPub/Sub,channelsaredividedintoshardsassignedt

Redisislimitedbymemoryconstraintsanddatapersistence,whiletraditionaldatabasesstrugglewithperformanceinreal-timescenarios.1)Redisexcelsinreal-timedataprocessingandcachingbutmayrequirecomplexshardingforlargedatasets.2)TraditionaldatabaseslikeMySQLorPos

Redisisbestsuitedforusecasesrequiringhighperformance,real-timedataprocessing,andefficientcaching.1)Real-timeanalytics:Redisenablesupdateseverysecond.2)Sessionmanagement:Itensuresquickaccessandupdates.3)Caching:Idealforreducingdatabaseload.4)Messagequ

Redismanagesclientconnectionsefficientlyusingasingle-threadedmodelwithmultiplexing.First,Redisbindstoport6379andlistensforTCPconnectionswithoutcreatingthreadsorprocessesperclient.Second,itusesaneventlooptomonitorallclientsviaI/Omultiplexingmechanisms

RedisonLinuxrequires:1)AnymodernLinuxdistribution,2)Atleast1GBofRAM(4GB recommended),3)AnymodernCPU,and4)Around100MBdiskspaceforinstallation.Tooptimize,adjustsettingsinredis.conflikebindaddress,persistenceoptions,andmemorymanagement,andconsiderusingc

INCR and DECR are commands used in Redis to increase or decrease atomic values. 1. The INCR command increases the value of the key by 1. If the key does not exist, it will be created and set to 1. If it exists and is an integer, it will be incremented, otherwise it will return an error; 2. The DECR command reduces the value of the key by 1, which is similar in logic and is suitable for scenarios such as inventory management or balance control; 3. The two are only suitable for string types that can be parsed into integers, and the data type must be ensured to be correct before operation; 4. Commonly used in concurrent scenarios such as API current limiting, event counting and shared counting in distributed systems, and can be combined with EXPIRE to achieve automatic reset temporary counters.

TransactionsensuredataintegrityinoperationslikedatabasechangesbyfollowingACIDprinciples,whilepipelinesautomateworkflowsacrossstages.1.Transactionsguaranteeall-or-nothingexecutiontomaintaindataconsistency,primarilyindatabases.2.Pipelinesstructureandau

The ZRANK command returns the ranking of members in an ordered set, arranged based on ascending fractions. For example, if the member "alice" score is the lowest, ZRANKuser_scoresalice returns 0; if it is the third lowest, it returns 2. When the scores are the same, Redis is sorted dictionary. If the key or member does not exist, nil is returned. To get the descending ranking, use the ZREVRANK command. Common considerations include: index starts from 0, processing score parallelism, confirming that the key type is an ordered set, and testing whether ZRANK returns nil if it exists. Applicable scenarios include game rankings, user rankings, progress bar display, etc., with a time complexity of O(logN), which is highly efficient. Anyway, use ZRAN