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Build index in the background with MongoDB
To create index in the background, use createIndex() method and set “background: true” as in the below syntax −
db.yourCollectionName.createIndex({"yourFieldName1":1,"yourFieldName2":1},{background: true} );Let us implement the above syntax in order to create index and set background −
> db.indexCreationDemo.createIndex({"StudentName":1,"StudentAge":1},{background: true} );
{
"createdCollectionAutomatically" : true,
"numIndexesBefore" : 1,
"numIndexesAfter" : 2,
"ok" : 1
}Let us display the indexes −
> db.indexCreationDemo.getIndexes();
This will produce the following output −
[
{
"v" : 2,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "web.indexCreationDemo"
},
{
"v" : 2,
"key" : {
"StudentName" : 1,
"StudentAge" : 1
},
"name" : "StudentName_1_StudentAge_1",
"ns" : "web.indexCreationDemo",
"background" : true
}
]
Updated on: 27-Mar-2020
2K+ Views
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