MongoDB data import and export and data backup _mongodb

This article is reproduced to: https://www.cnblogs.com/qingtianyu2015/p/5968400.html

1. Export tool: Mongoexport 1, Concept: the Mongoexport tool in MongoDB can export a collection to a file in JSON format or CSV format.     You can specify the exported data items through parameters, or you can export the data based on the criteria you specify.             2. Syntax: mongoexport-d dbname-c collectionname-o file--type json/csv-f field parameter description:-D: Database name -c:collection name-o: Output filename--type: output format, default to json-f: Output field, if-type is CSV, you need To add-F "field name" 3, Example:

2, Data import: Mongoimport 1, Syntax: mongoimport-d dbname-c collectionname--file filename--headerline--type -F Field Parameter description:-d: Database name-c:collection name--type: Imported format default json-f: Import Field name--headerline: If the imported format is CSV, you can use the header of the first row as the imported field--file: File 2 To import, example: sudo mongoimp ort-d mongotest-c users--file/home/mongodump/articles.json--type JSON
-------------------MongoDB Backup and Recovery-------------------1, MongoDB database backup     1, Syntax:         Mongodump-h dbhost-d dbname-o dbdirectory         parameter description:            - H:MONGDB address of the server, for example: 127.0.0.1, of course, you can also specify the port number: 127.0.0.1:27017            -D: Database instances that need to be backed up, For example: Test            -O: Backup data storage location, such as:/home/mongodump/, of course, the directory needs to be established in advance, this directory contains the database instance of the backup data.     2, example:         sudo rm-rf/home/momgodump/        sudo mkdir-p/ho Me/momgodump         sudo mongodump-h 192.168.17.129:27017-d itcast-o/home/mongodump/  &NBSP ;    -2, MongoDB database recovery     1, Syntax:         mongorestore-h dbhost-d dbname--dir Dbdi Rectory           parameter or name:          -H:MONGODB server address   &NBSP ;        -D: Database to be restoredExample: Test, of course, this name can also be different from the backup time, such as Test2            --DIR: Backup data location, for example:/home/mongodump/ itcast/           --drop: When recovering, first delete the current data, and then restore the backed-up data. That is, after the recovery, the data added modified after the backup will be deleted and used with caution.     2, Example: