Mongorestore to a different database

问题

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

回答1:

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}.*"

回答2:

In addition to the answer of Blakes Seven, if your databases use authentication I got this to work using the --uri option, which requires a recent mongo version (>3.4.6):

mongodump --uri="mongodb://$sourceUser:$sourcePwd@$sourceHost/$sourceDb" --gzip --archive | mongorestore --uri="mongodb://$targetUser:$targetPwd@$targetHost/$targetDb" --nsFrom="$sourceDb.*" --nsTo="$targetDb.*" --gzip --archive

来源：https://stackoverflow.com/questions/36321899/mongorestore-to-a-different-database