MongoDB Developer Certification – Practice tests

1. A collection in MongoDB is a group of:  Related documents  Databases  Schema  Rows Explanation: Answer: (a) Explanation: A collection in MongoDB is a group of related documents. 2. Select the correct query to find all the users whose age…

YCSB Automated for MongoDB Benchmarkds

http://dbversity.com/wp-content/uploads/2019/02/YCSB_MongoDB_Benchmarks_indexes_on_different_datastores.docx

Mongo Compass Vs Studio 3T – Comparision

http://dbversity.com/wp-content/uploads/2019/02/Studio3Tvs.MongoDBCompass-featurecomparison.pdf

Numberly Moves from MongoDB to Scylla to Simplify Operations and Reduce Costs

Numberly is a leading programmatic advertising firm that helps brands collect and activate consumer data across digital channels. The company’s multi-platform, multi-device, multi-format solutions include real-time bidding, targeted display advertising, CRM program and an advanced data management platform. A big…

Building a MongoDB 4.0.2 Sharded Cluster

Building a MongoDB 4.0.2 Sharded Cluster

http://dbversity.com/wp-content/uploads/2019/01/Building-a-Sharded-Cluster.docx

Depth of nested fields in MongoDB

var spaceChar = ‘ ‘; function getParentNames(jsstr, n, pos) { if (n <= 1) { return “”; } else { var spacesBeforeParent = jsstr.substr(pos, n) + ‘”‘; var indexParent = jsstr.lastIndexOf(spacesBeforeParent, pos); if (indexParent > 0) { var posParent =…

How to Rock with MyRocks !!

Please join Percona’s Chief Technology Officer, Vadim Tkachenko as he presents “How to Rock with MyRocks” on, Thursday, January 17th at 10:00 AM PST (UTC-8) / 1:00 PM EST (UTC-4). MyRocks is a new storage engine from Facebook and is…