How Do I Backup A Collection In MongoDB?

To create backup of database in MongoDB, you should use

mongodump command

. This command will dump the entire data of your server into the dump directory. There are many options available by which you can limit the amount of data or create backup of your remote server.

How do I restore my MongoDB database?

The basic way to restore a database is to

use the mongorestore command to specify the backup directory (dump directory)

without any options. This option is suitable for databases located in the localhost (127.0. 0.1) using the port 27017.

How do I restore a collection in MongoDB?

Run the mongorestore command

to restore the dump file into any MongoDB instance. Choose either the original MongoDB instance that the backup was created for, or any alternative instance. When the database or collection restore operation finishes, go to Jobs and Operations > Active Resources.

How do I view MongoDB collections?

Use show collections command from MongoDB shell

to list all collections created in the current database. First, select the database you want to view the collection.

How do I revert to a previous change in MongoDB?

2 Answers.

There is no rollback option

(rollback has a different meaning in a MongoDB context), and strictly speaking there is no supported way to get these documents back – the precautions you can/should take are covered in the comments.

Where is MongoDB data stored?

Install MongoDB On Windows

MongoDB requires a data folder to store its files. The default location for the MongoDB data directory is

c:datadb.

So you need to create this folder using the Command Prompt.

Which is the method used to check whether collection is capped or not?

isCapped() command

is used to check if a collection is a Capped collection or not. Advantages of Capped Collections: 1. Queries do not need an index to return documents in insertion order due to which it provide higher insertion throughput.

Which field is required of all MongoDB documents?

In MongoDB, each document stored in a collection requires a

unique _id field

that acts as a primary key. If an inserted document omits the _id field, the MongoDB driver automatically generates an ObjectId for the _id field.

How do I export a MongoDB database?

1. Step 1: Connecting To A MongoDB Instance. A MongoDB instance running on port “27017”, doesn’t necessarily require a host or port to be specified. …
2. Step 2: Specifying Host And/Or Port Of The MongoDB Instance. The port and/or hostname can be specified in multiple ways:

What is MongoDB backup?

You can create a backup of a MongoDB deployment by

making a copy of MongoDB’s underlying data files

. If the volume where MongoDB stores its data files supports point-in-time snapshots, you can use these snapshots to create backups of a MongoDB system at an exact moment in time.

How do I list all collections in MongoDB?

1. connect with the MongoDB database using mongo . This will start the connection.
2. then select the database you want. In the above it is anuradhfirst . Then run use anuradhfirst . This will switch to the database you want.
3. then run show collections command. This will show all the collections inside your selected database.

How do I show all collections in MongoDB shell?

To list all collections in Mongo shell, you can use

the function getCollectionNames()

.

How do I list all files in MongoDB?

Connect to a database using the

getDatabase()

method. Get the object of the collection from which you want to retrieve the documents, using the getCollection() method. Retrieve the iterable object containing all the documents of the current collection by invoking the find() method.

How do I undo a delete in MongoDB?

1. To delete multiple documents, use db. collection. deleteMany() .
2. To delete a single document, use db. collection. deleteOne() .

How do I restore a single database in MongoDB?

To restore a single database you need to provide the path

to the dump directory as part of the mongorestore command line

. The –db option for mongodump specifies the source database to dump. The –db option for mongorestore specifies the target database to restore into.

Does MongoDB have rollback?

By default,

when a rollback occurs, MongoDB writes the rollback data to BSON files

. Starting in Mongo 4.4, the rollback directory for a collection is named after the collection’s UUID rather than the collection namespace.