w3resource

MongoDB: db.fsyncLock() method

db.fsyncLock

The db.fsyncLock() method is used to force the mongod to flush all pending write operations to the disk and locks the entire mongod instance to prevent additional writes until the user releases the lock with the db.fsyncUnlock() command. db.fsyncLock() is an administrative command.

Syntax:

db.fsyncLock()

This function locks the database and create a window for backup operations.

Example: MongoDB: db.fsyncLock() method

db.fsyncLock();

Sample document in the restaurants collection:

Output:

> db.fsyncLock();
{
        "info" : "now locked against writes, use db.fsyncUnlock() to unlock",
        "seeAlso" : "http://dochub.mongodb.org/core/fsynccommand",
        "ok" : 1
}

Retrieve the restaurants data from here

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