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####ForewordThe rows of the RowKey of HBase are sorted by row keys in dictionary order. This design optimizes scanning and allows the storage of related rows or adjacent rows that will be read together. However, poorly designed row keys are a common cause of hotspotting. When a large amount of client traffic is directed to one or more nodes in ...

This article mainly introduces the installation of MongoDB and the software versions used: MongoDB 5.0.5 and Centos 7.6. 1. Stand alone installation 1.1. Download and unzip MongoDB Download address: https://www.mongodb.com/try/download/community Decompression: tar zxvf mongodb Linux x86_ 64-rhel70-5.0.5. tgz 1.2. Create data and log direct ...

1, Introduction to Redis    NoSQL (Not Only SQL), which means Not Only SQL, but also non relational database.   with the development of internet web2 With the rise of web2.0 website, the traditional relational database is dealing with web2.0 0 websites, especially the super large-scale and highly concurrent SNS type web2 0 ...

brief introduction Delete data in batch according to table primary key POST http://{Tcaplus_REST_URL} Request syntax Http request #Tencent cloud console RESTful Endpoint, ip:80, port: 80 by default http://172.17.0.22 #Tcallusdb local docker RESTful Endpoint, ip:31001, port default 31001 http://9.135.8.93:31001 Http head nameRequiredRes ...

brief introduction Obtain relevant records according to the primary key index, which is defined in the table definition proto file. The primary key index is an index designed based on the primary key field. The interface also supports the return of filter fields. Specify the field name to be returned through the Select parameter; The number of ...

Redis The REmote DIctionary Server(Redis) is a key value storage system written by Salvatore Sanfilippo. Redis is an open source log and key value database written in ANSI C language, complying with BSD protocol, supporting network, memory based and persistent, and provides API s in multiple languages. It is often called a data structure ...

Architecture diagram Install Redis service wget http://download.redis.io/releases/redis-2.8.6.tar.gz tar -xvf redis-2.8.6.tar.gz cd redis-2.8.6 make mkdir /usr/local/redis/etc cp redis.conf /usr/local/redis/etc/ ps: make error resolvent: Execute the command make MALLOC=libc Modify the profile to start the service vim /usr/local/re ...

catalogue 1. Know Redis What can Redis do? characteristic 2. Basic knowledge Redis is single threaded Why is Redis single thread so fast? 3. Redis five data types 1,String 2,List 3,Set 4,Hash 5,Zset 4. Redis has three special data types 1,geospatial 2,hyperloglog 3,Bitmaps 5. Redis transaction 6. Redis implements optimistic ...

Nosql overview Why use Nosql Stand alone MySQL Era In the 1990s, the number of visits to a website was generally not too large, and a single database was sufficient. However, with the increase of users, the following problems occurred: The amount of data is too large for one machineThe index of data (B+ tree) can't fit into a machine's m ...

[tcallusdb knowledge base] restfulapi2 0 for generic table - [PB] FieldGetRecord introductionbrief introductionThe corresponding field selected in the auto increment record only works on numeric type fields. It is often used in scenes such as players' experience value increase and level increase to avoid checking and updating first and reduce n ...