Contents
How do I restore my Oplog?
Recover a database
- Dump the MongoDB Oplog to a folder (e.g. ~/oplog): mongodump -u root –authenticationDatabase admin -d local -c oplog.rs -o ~/oplog.
- Create a copy of the dump file to ensure you can manipulate it safely: mkdir ~/oplog2 && cp ~/oplog/local/oplog.rs.bson ~/oplog2/oplog.bson.
How do I restore a dropped database in MongoDB?
Your best option would be to restore from your most recent MongoDB backup. In a standalone MMAP deployment without backups, the only other possibility would be writing custom data recovery scripts to try to identify and salvage deleted documents.
What is the default Oplog size?
Oplog Size
| Storage Engine | Default Oplog Size |
|---|---|
| In-Memory Storage Engine | 192 MB of physical memory |
| WiredTiger Storage Engine | 192 MB of free disk space |
How to run mongoestore from the command line?
The mongorestore command has the following form: Run mongorestore from the system command line, not the mongo shell. For example, to restore from a dump directory to a local mongod instance running on port 27017: As mongorestore restores from the dump/ directory, it creates the database and collections as needed and logs its progress:
Is the MongoDB server compatible with mongorestore?
Starting with MongoDB 4.4, mongorestore is now released separately from the MongoDB Server and uses its own versioning, with an initial version of 100.0.0. Previously, mongorestore was released alongside the MongoDB Server and used matching versioning.
How to restore data from mongod to localhost?
The –nsInclude statement specifies to only restore documents in the transactions database while –nsExclude instructs mongorestore to exclude collections whose names end with _dev. mongorestore restores data to the mongod instance running on the localhost interface on port 27017 .
How to restore from compressed files in mongodump?
mongorestore can restore from compressed files or compressed archive files created by mongodump. To restore from a dump directory that contains compressed files, run mongorestore with the –gzip. For example, the following operation restores the test database from the compressed files located in the default dump directory: