nosql data modeling

to be supported. This method of valuation of the different types of insurance, such as the price of the insurance is only related to the period and the period of payment, there is no correlation between sex and age of insurance, in which case the storage in the database will be different, and the formula will not be the same, in addition, not every type of insurance option values are consistent, For example, during the insurance period of this option, a insurance may be 10 and 20 two option

Do a year of freshman year project, for relational database structure still have some understanding, sometimes think this two-dimensional table is not very handy. After reading an article, I had a preliminary understanding of NoSQL (Https://keen.io/blog/53958349217/analytics-for-hackers-how-to-think-about-event-data). The article here is very good, and it does write the "where" of

toss the bottom platform to build and configuration, simple to complete the installation. This is the Gospel for Hadoop beginners.Pull a little bit more, back in the home to share the installation and use of Dkhadoop, today want to share with you is the database of big Data base content: SQL and NoSQL. To understand these two types of data, it is only necessary

"NoSQL essence" Reading notes, reproduced please indicate the source "Jiq Technical Blog"The main reason for the emergence of NoSQL is the need for a database that can run on a large clusterAggregation-oriented databases are well suited for scale-out cluster architectures, where aggregation naturally becomes a data distribution unit with two main paths to

Features of the NoSQL aggregation data modelThe aggregation data model is characterized by putting frequently accessed data together (aggregated in one piece);The benefits are obvious, and for a query request, you can take all the data out in one interaction with the databas

In terms of creating, communicating, accessing content, sharing information, and buying products, the rapid expansion of a new generation of internet-based services, such as e-mail, blogs, social media, search, and E-commerce, has actually redefined the behavior and trends of WEB users. As the number of these systems continues to grow, IT professionals are witnessing the scaling up of data and data consumed

192.168.157.11 6379Redis6381.confPort 6381182 Dbfilename Dump6381.rdb513 Appendfilename "Appendonly6381.aof"211 Slaveof 192.168.157.11 6379Note: default: Read-only from node(Error) READONLY you can ' t write against a read only slave.Modify Parameters:Slave-read-only Yes# Masterauth 4. The process of communication between master and slave nodesMaster node from nodeSynchronizing an RDB----------->Synchronizing the aof-----------> Redo LogsMust NOTE: Each time you start, the number of nodes from

is treated as an key empty string, so an operation that does not exist key BITCOUNT results in0eg> Set name 123OK> Get name"123"> Bitcount nameTen> Bitcount nameTen> Bitcount Count0> Set Test 1OK> Get Test"1"> Bitcount Test3> Set name 0OK> Get Naem(nil)> Get name"0"> Bitcount name2> Set name 3OK> Get name"3"> Bitcount name4(one): GetRange key Start endGets the specified substring of the valu corresponding to the keyeg:> Set name JilindaxueOK> GetRange Name 1 4"Ilin"(+1): incr key increment that

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minus the specified value append appends a string to the specified key to return the length of the new string value strlen takes the length of the value of the specified key N Bsp Hashes type Redi->hash is a string-type field and value mapping table, and his addition, delete operations are all 0 (1). Hash is suitable for storing objects, which is equivalent to dividing each field of an object into the brother string type, storing a degree downstream in a hash type with less memory, and p