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SQL Joins are used to combine documents/rows from 2 or more tables based upon common field present in them. MongoDB 3.2 launched the most awaited feature "Joins" which is supported in SQL database however was not present in the earlier version of MongoDB. This feature will change the way you design your database schema and application...
Everyone thinks of creating index, but nobody pays attention towards removing them once they are created and not required .Too many indexes or unnecessary index can degrade your DB performance. To Optimize indexes in mongo we need to understand following things : How indexes works in mongoDB: Let’s say we have created compound...
Cypher Query Language or CQL is the language to traverse and update graph structures in Neo4J. The language is similar to SQL and provides a declarative syntax for querying. However, it is worth mentioning that unlike SQL in which one needs to provide the complete procedure how to get records by defining joins etc. CQL's language...
Neo4J is a NoSQL database that stores information in the form of a huge property graphs where tuples/rows (nodes) are connected to each other with relationships (edges) both of which can have variable number of properties associated with them. Traversing data in the form of graphs implies that we can explore highly connected...
Our cloud DevOps engineers have been using Elasticsearch on production environment for an e-commerce website for quite a while. The website has one admin server to manage activities such as adding new production, managing discounts on various items, fetching reports etc. We came across a requirement where downloading reports from admin...
Our DevOps team was using Found for one of our projects in the production environment. We have been facing a problem with found where it’s memory pressure frequently goes up and does not drop down so easily and until the time it remains up the Found was not able to serve the requests. Then, we decided to move to self-hosted...
Application Security, Technology
MongoDB is a NoSQL database that delivers a performance oriented, highly available and scalable database system. Recently, a large number of MongoDB instances were found to be publicly accessible over the Internet. A large amount of data was leaked due to the fact that these instances were running an outdated and unpatched version of...
MongoDb introduced free text search beta in its v2.4 but it was in experimental phase. In v.2.6, MongoDb has finally made its free text search (the most requested feature) production ready. In this post, we will have a look at how can we use this pretty useful feature that MongoDb offers us. To enable Free text search, Mongodb...
The day one at GGX 2013 London was really awesome. The atmosphere, the sessions and the speakers really made the day wonderful. We could feel the buzz and energy of the thriving and closely knitted Groovy/Grails community all day long. The show was very well managed by Skills Matter and nicely driven by Peter Ledbrook. Here are some...