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I'm using MongoDB and have a collection with roughly 75 million records. I have added a compound index on two "fields" by using the following command:
db.my_collection.ensureIndex({"data.items.text":1, "created_at":1},{background:true}). Two days later I'm trying to see the status of the index creation. Running db.currentOp() returns {}, however when I try to create another index I get this error message:
cannot add index with a background operation in progress. Is there a way to check the status/progress of the index creation job?
One thing to add - I am using mongodb version 2.0.6. Thanks!
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In MongoDB, you can use the cursor. explain() method or the db. collection. explain() method to determine whether or not a query uses an index.
MongoDB automatically determines whether to create a multikey index if the indexed field contains an array value; you do not need to explicitly specify the multikey type.
Finding indexes You can find all the available indexes in a MongoDB collection by using the getIndexes method. This will return all the indexes in a specific collection. Result: The output contains the default _id index and the user-created index student name index.
CreateIndex() Method. In MongoDB, indexes are special data structures that store some information related to the documents such that it becomes easy for MongoDB to find the right data file. The indexes are ordered by the value of the field specified in the index.
At the mongo shell, type below command to see the current progress:
rs0:PRIMARY> db.currentOp(true).inprog.forEach(function(op){ if(op.msg!==undefined) print(op.msg) }) Index Build (background) Index Build (background): 1431577/55212209 2% If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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