How do I restore a collection in MongoDB?
Run the MongoDB mongodump command to create a dump file of any specific database or collection. 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.
How do I restore a single database in MongoDB?
include the following options to connect to the tunnel [1]:
- –port set to the port for the tunnel.
- –db set to the name of the database to export.
- –collection for a single collection.
- –out set to an empty directory to output the data dump. Important.
How restore MongoDB dump Ubuntu?
- Start mongod.
- Navigate to folder where you have extracted “enron.zip” in OS shell(cmd in case of windows)
- Then type “>mongorestore -d your_db_name dump/enron”
How do I back up 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.
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.
Where is Mongodump stored?
The mongodump command will overwrite the existing files within the given backup folder. The default location for backups is the dump/ folder. When the WiredTiger storage engine is used in a MongoDB instance, the output will be uncompressed data.
Does Mongodump lock the database?
Mongdump does not lock the db. It means other read and write operations will continue normally. Actually, both mongodump and mongorestore are non-blocking. So if you want to mongodump mongorestore a db then its your responsibility to make sure that it is really a desired snapshot backup/restore.
Which of the following is supported for backing up and restoring MongoDB deployments?
MongoDB Cloud Manager
The MongoDB Cloud Manager supports the backing up and restoring of MongoDB deployments. MongoDB Cloud Manager continually backs up MongoDB replica sets and sharded clusters by reading the oplog data from your MongoDB deployment.
How do I schedule a backup in MongoDB?
- Step 1 — Insert Test Data.
- Step 2 — Use mongodump to Back Up MongoDB Data.
- Step 3 — Upload the Backup Archive to DigitalOcean Spaces.
- Step 4 — Create and Test Backup Script.
- Step 5 — Schedule Daily Backups Using Cron.
- Step 6 — Perform a Test Recovery.
What is the maximum size of collection in MongoDB?
Sharding Operational Restrictions
| Average Size of Shard Key Values | 512 bytes | 256 bytes |
|---|---|---|
| Maximum Number of Splits | 32,768 | 65,536 |
| Max Collection Size (64 MB Chunk Size) | 1 TB | 2 TB |
| Max Collection Size (128 MB Chunk Size) | 2 TB | 4 TB |
| Max Collection Size (256 MB Chunk Size) | 4 TB | 8 TB |
Can I have time to live index with capped collection?
TTL indexes are not compatible with capped collections.
How to restore backups created by mongodump?
You can restore the dumps (backups) created by the mongodump command into a MongoDB instance using the mongorestore command. In this article, you will learn how to utilize the mongorestore command to restore database backups effectively.
How is mongorestore used to restore backups?
mongorestore is a simple utility that is used to restore backups. It can load data from either: A database dump file created by the mongodump command The standard input to a mongod or mongos instance
Is there a way to restore a collection in MongoDB?
You can also restore a specific collection or collections from the dump/ directory. For example, the following operation restores a single collection from corresponding data files in the dump/ directory: If the dump/ directory does not contain the corresponding data file for the specified namespace, no data will be restored.
Where does mongodump connect to the MongoDB instance?
When you run mongodump without any arguments, the command connects to the MongoDB instance on the local system (e.g. localhost) on port 27017 and creates a database backup named dump/ in the current directory. You can also specify the –host and –port of the MongoDB instance that the mongodump should connect to. For example: