Requirement background: a certain timing task generates thousands or more JSON data. This data has not been fully written into the database, and the data of the next scheduled task has been generated. How to solve the data congestion caused by this?
When spring boot is used to insert data into MongoDB database, the save method in MongoTempla ...
Added by ghettopixel on Tue, 30 Jun 2020 19:43:06 +0300
MongoDB mass data query is fast without data model
Suitable for log database
Or the intermediate database reads and stores some business data to be read from the MySQL database
MongoDB is not suitable for multi table transaction function, and there is not a good determination mechanism for write operation. It is not suitabl ...
Added by steved on Tue, 05 May 2020 01:46:33 +0300
Elastsearch basic query
Elasticsearch is a very powerful full-text search engine. The purpose of using elasticsearch is to quickly query the desired data.
Basic query: query with elastic search built-in query criteria
Composite query: a composite query that combines multiple basic queries
Filter: when querying, filter out the desired data ...
Added by natronp on Mon, 04 May 2020 06:30:21 +0300
The calculated function of real-time calculation attributes, real-time calculation attributes, is just the function writing method, and there is no need to declare in data. Some business logic codes can be placed in computed. Remember to return.
As for the operation of mongodb's embedded objects, uncle has said in the. net platform. At the same time, uncle has encapsulated mongo's storage and is very convenient to use. In the java springboot framework, of course, there are corresponding methods. Let's talk about it. I hope it can help the students who just contacted mongodb!
Data stru ...
Added by harlowhair on Thu, 02 Apr 2020 05:26:27 +0300
Author: Yang Taotao
Senior database expert, specializing in MySQL for more than ten years. Good at mysql, PostgreSQL, MongoDB and other open-source database related backup and recovery, SQL tuning, monitoring operation and maintenance, high availability architecture design, etc. At present, he is working in aikesheng, providing MySQL related ...
Front of Article
This content is just to introduce the most basic use and configuration of mongodb. As a well-known database, it has quite a lot of advanced usage. It will expand to introduce a lot of content. Of cours ...
Added by coder9 on Fri, 24 Jan 2020 06:42:43 +0200
MongoDB has supported the change stream capability since version 3.6 (many enhancements have been made in versions 4.0 and 4.2) for subscribing to modifications within MongoDB. change stream can be used for incremental data migration, synchronization between MongoDB and for applying MongoDB's incremental subscription to other related systems; f ...
Added by hubbardude on Sun, 05 Jan 2020 05:42:03 +0200