How to use backup and restore all databases from mongodb?

The backups are stored in the directory that you have specified with the --out option in command line. If you do not specify any output dir the backup will be placed to ./dump directory. With the mongorestore you have to specify the directory where you have dumped before as a command line argument.

On sharded environment the backup will be flattened if you use mongodump through a mongos. After restore you will have to re-shard the collections. so restoring not always effortless. See documentation:http://docs.mongodb.org/manual/tutorial/backup-small-sharded-cluster-with-mongodump/

You can dump directly the db folders too, check the cli options.

For sharded clusters you can check the possibilities here: http://docs.mongodb.org/manual/administration/backups/#sharded-cluster-backups

restore allmongorestore --host= --port= --username= --authenticationDatabase= --nsInclude "."

backup allmongodump --ssl --host --port -p --authenticationDatabase -u -p --out

If you want to backup databases use:mongodump --ssl --host --port -p --authenticationDatabase -u -p --out

if the database has ssl enabled include the --ssl flagif you don't include the --out mongodump will create a "/dump" directory.inside the dump or specified backup directory you'll find directories with the names of your databases, inside each of them, you'll find the backups files, for each collection you'll find a ".bson" and a ".metadata.json"

To restore all the databases use:mongorestore --ssl --host= --port= --username= --authenticationDatabase= --nsInclude "."

Again if the database has ssl enabled include the --ssl flag if not just remove it.the "--nsInclude" flag tell mongorestore which databases or collections you want to restore.Examples:--nsInclude=test.users (this will backup the users collection of the database test, and therefore will fail if the path to the dump is anything but the path to the users.bson of that particula database)

To include all the database and all the collections use --nsInclude=. or --nsInclude .then define the path to all the collection directories of your backup