Create MongoDB index in background

gistfile1.txt

//query to create an index in background. won't stop current reads/writes on the collection
db.collection.createIndex( { 'key1': 1 }, { background: true } )

//query to create a compount index in background. won't stop current reads/writes on the collection
db.collection.createIndex( { 'key1': 1, 'key2': 1 }, { background: true } )

//to check the progress of indexing operation
db.currentOp(true).inprog.forEach(function(op){ if(op.msg!==undefined) print(op.msg) })

//to kill the indexing operation, just in case.
db.killOp(<opid of the query to kill>)