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In MongoDB, is it possible to dump a database and restore the content to a different database? For example like this:
mongodump --db db1 --out dumpdir mongorestore --db db2 --dir dumpdir But it doesn't work. Here's the error message:
building a list of collections to restore from dumpdir dir
don't know what to do with subdirectory "dumpdir/db1", skipping...
done
546
Basic mongorestore syntax 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.
Mongorestore only uses insert commands and does not execute any modifications when restoring data into an existing database. As a result, the restoration process will not overwrite existing documents that have a matching value for the _id field of the documents in the backup.
To restore a single database or a collection (or specific documents) from a snapshot, you can use the Queryable Backup to export a single database or collection to restore to the target deployment.
The best way to do it is from the mongodb console: > use mydb; > db. dropDatabase(); Alternatively, you can stop mongod and delete the data files from your data directory, then restart.
You need to actually point at the "database name" container directory "within" the output directory from the previous dump:
mongorestore -d db2 dumpdir/db1 And usually just <path> is fine as a positional argument rather than with -dir which would only be needed when "out of position" i.e "in the middle of the arguments list".
p.s. For archive backup file (tested with mongorestore v3.4.10)
mongorestore --gzip --archive=${BACKUP_FILE_GZ} --nsFrom "${DB_NAME}.*" --nsTo "${DB_NAME_RESTORE}.*" 
mongodump --db=DB_NAME --out=/path-to-dump mongorestore --nsFrom "DB_NAME.*" --nsTo "NEW_DB_NAME.*" /path-to-dump If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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