- Is MongoDB good for large data?
- Which is the method used in MongoDB to grant user?
- Is MongoDB better than SQL?
- Can I run MongoDB locally?
- How many concurrent requests can MongoDB handle?
- Is MongoDB multithreaded?
- What is the maximum document you can insert read replace in a collection?
- Is MongoDB transactional?
- Which lock in MongoDB provides concurrency?
- How do I insert multiple rows in MongoDB?
- What is the maximum size of collection in MongoDB?
- How many collections can be created in MongoDB?
- How do I limit in MongoDB?
- Is the method in MongoDB similar to SQL order by clause?
- How much RAM does MongoDB need?
- Which field is always the first field in the document?
- How many connections can MongoDB handle?
- Is MongoDB thread safe?
Is MongoDB good for large data?
Because of its features, MongoDB is The database for Big Data processing.
MongoDB, the open-source NoSQL database, was recently named “Database Management System of the Year” by DB-Engines with a good reason, as NoSQL databases are generally better-suited for processing Big Data than RDBMS..
Which is the method used in MongoDB to grant user?
To add a user, MongoDB provides the db. createUser() method. When adding a user, you can assign roles to the user in order to grant privileges. The first user created in the database should be a user administrator who has the privileges to manage other users.
Is MongoDB better than SQL?
MongoDB is almost 100 times faster than traditional database system like RDBMS, which is slower in comparison with the NoSQL databases. … MongoDB supports deep query-ability i.e we can perform dynamic queries on documents using the document-based query language that’s nearly as powerful as SQL.
Can I run MongoDB locally?
To connect to your local MongoDB, you set Hostname to localhost and Port to 27017 . These values are the default for all local MongoDB connections (unless you changed them). … This is how you can use MongoDB Compass to connect to a MongoDB that’s running on your own computer.
How many concurrent requests can MongoDB handle?
Scaling Crittercism to 30,000 Requests Per Second and Beyond with MongoDB.
Is MongoDB multithreaded?
MongoDB uses multi-granularity locking  that allows operations to lock at the global, database or collection level, and allows for individual storage engines to implement their own concurrency control below the collection level (e.g., at the document-level in WiredTiger).
What is the maximum document you can insert read replace in a collection?
CosmosDB is not meant to be used for asset storage, that’s why each document has a size limit of 2 MB.
Is MongoDB transactional?
In MongoDB 2.2, individual operations are Atomic. … By having per database locks and control reads and writes to collections, write operations on collections are Consistent and Isolated.
Which lock in MongoDB provides concurrency?
MongoDB uses reader-writer locks that allow concurrent readers shared access to a resource, such as a database or collection, but in MMAPv1, give exclusive access to a single write operation. WiredTiger uses optimistic concurrency control. WiredTiger uses only intent locks at the global, database and collection levels.
How do I insert multiple rows in MongoDB?
collection. insert () method to insert the multiple documents into the collection. To create an array of documents, need to define the variable with some name and assign the array of documents to the created variable and then insert into Mongodb.
What is the maximum size of collection in MongoDB?
Sharding Operational RestrictionsAverage Size of Shard Key Values512 bytes64 bytesMaximum Number of Splits32,768262,144Max Collection Size (64 MB Chunk Size)1 TB8 TBMax Collection Size (128 MB Chunk Size)2 TB16 TBMax Collection Size (256 MB Chunk Size)4 TB32 TB
How many collections can be created in MongoDB?
That is merely the default setting. Yes, there is a default setting. It does say on the limits page that 24000 is the limit ( http://docs.mongodb.org/manual/reference/limits/#Number%20of%20Namespaces ), as though there is no way to expand that but there is.
How do I limit in MongoDB?
In MongoDB, you can use the limit() method to specify a maximum number of documents for a cursor to return. When you query a collection using the db. collection. find() method, you can append limit() to specify the limit.
Is the method in MongoDB similar to SQL order by clause?
8. Which of the following method corresponds to Order by clause in SQL? Explanation: The sort() method orders the documents in the result set. … Explanation: limit() corresponds to the LIMIT statement in SQL.
How much RAM does MongoDB need?
approximately 1GBMongoDB requires approximately 1GB of RAM per 100.000 assets. If the system has to start swapping memory to disk, this will have a severely negative impact on performance, and should be avoided.
Which field is always the first field in the document?
_id fieldThe _id field is always the first field in the documents. If the server receives a document that does not have the _id field first, then the server will move the field to the beginning. The _id field may contain values of any BSON data type, other than an array.
How many connections can MongoDB handle?
5000 connectionsOn MongoDB, connections are a lot lighter and we set the limit at 5000. That’s across the database as a whole, not particular portals. So, with 5000 connections it should be pretty hard to hit the limit and if you do, chances are there’s something up with your application.
Is MongoDB thread safe?
Thread Safety Not all of the MongoDB client classes are thread-safe – please refer to the documentation of your specific driver to check if the classes you’re using are thread-safe. For example, in the Java driver, the MongoClient class is thread-safe.