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Installation and configuration of Monstache monstache is a go daemon that can synchronize MongoDB data to Elasticsearch in real time. preparation Ready for mongodb4 4.6 replica set environment The Elasticsearch 7 environment is ready github source code address of monstache: https://github.com/rwynn/monstache monstachemongodbelashticsearch53 ...

preface Simply sort out the general operations. text Although generally speaking, writing code depends on ideas, how can you know whether mongodb meets your needs if you don't know what common operations mongodb has? For example, if you don't have aggregation functions and you have to write aggregation yourself, then the workload is still quite ...

At present, the database is divided into: Relational database:             mysql，sqlserver，Oracle Note: the data is stored in the data table, which is stored in the computer disk Non relational database:             mongoDB，redis Note: the data is stored in the computer memory, so it is faster to read and write data To insta ...

This article comes from the works that won the shortlisted case award of 2021MongoDB technology practice and application case solicitation activityAuthor: Zhang JiaqiaoProblem descriptionThis paper introduces a detailed process and solutions to help businesses troubleshoot the problem of slow online query operation.The business is using find() ...

MongoDB is used in recent projects, so I probably learned the basic operation. Please forgive me for the bad writing. For more details, please go to the official website: https://docs.mongodb.com/manual/aggregation/ 1,$type 1.1 description The     $type operator retrieves the matching data types in the collection based on ...

1. MongoDB index1.1. Create index db.books.ensureIndex{{number:1}} Create an index and specify the name of the index db.books.ensureIndex({number:1},{name:"book_"}) 1.2 points needing attention in index use1) When creating an index, note that 1 is creating an index in positive order - 1 is creating an index in reverse order2) Index creation wil ...

catalogue introduce background Indexes Default index How to create an index Different types of indexes in MongoDB 1. Single field index  2. Composite index 3. Multi key index 4. Text index MongoDB index properties 1. Unique 2. Sparse 3. Partial index 4. TTL index Some key points 1. getIndexes() 2. dropIndex() 3. dropInd ...

1, Demand analysis The following functions are required: 1) Basic addition, deletion, modification and query API 2) Query comments by article id 3) Comment like 2, Table structure analysis The data for storing article comments is stored in MongoDB. The data structure is as follows: Database: articledb Column comment Field nameField meaningF ...

MongoDb tutorial 1, Installing MongoDB on Linux platform MongoDB provides 32-bit and 64 bit installation packages on linux platform. You can download the installation package on the official website. Download address: https://www.mongodb.com/download-center#community 1. Find the corresponding download address wget https://fastdl.mongodb.org/ ...

MongoDB's aggregate query is quite complex, but don't rush to persuade yourself. Remember to see that there are colored eggs in the end 1, What is the MongoDB Aggregation Framework MongoDB aggregation framework is a computing framework that can: Acting on one or more sets;A series of operations on data in a set;Convert these data into ...