DBVersity at Paper.li
The mongodb Daily Published by DBVersity MongoDB 10 June 2016 Science Technology Leisure Business Education #mongodb #javascript Today’s headline MongoDB queries don’t always return all matching documents! — Meteor Engineering engineering.meteor.com – When I query a database, I generally expect…
MongoDb Interview questions
1.What makes MongoDB the best? MongoDB is considered to be best NoSQL database because of :Document-oriented (DO) High performance (HP) High availability (HA) Easy scalability Rich query language 2.How to do transactions/locking in MongoDB? MongoDB does not use conventional locking…
You can make Left Join in MongoDB ?
Most will say no , because it is NoSQL ( free of schemas and joins ) . But from the new version of MongoDB (3.2) , the answer is YES! Visit the blog… We all know that one of…
MongoDB: Defragmentation testing
[dbversit@dbversity bin]$ ps -ef | grep mongo | grep -v grep dbversit 6471 1 0 04:55 ? 00:00:45 ./mongod –configsvr –dbpath /tmp/mongodb/config1 –logpath /tmp/mongodb/logs/config.log –port 30001 –config /etc/mongod.conf dbversit 7165 1 3 05:00 pts/2 00:07:47 ./mongod –shardsvr –replSet rs –dbpath…
Why MongoDB have variant fragmented space in a same ReplicaSet members ?
Why MongoDB have variant fragmented space in a same ReplicaSet members ? When we’ve 3 node replica set (PSS) and do have bulk updates and delete operations, though they’ll be in sync through same OpLog mechanism – why do I…
mongoimport of a JSON Array with ‘to’ field got issues ?!!
While importing attached JSON array as below, I see below errors – Sample records from the JSON file are below. [{ “_id” : { “$oid” : “52fa519da6342a0dcd97222a” }, “active” : true, “from” : { “$date” : “2000-01-01T00:00:00.000-0500” }, “kind” :…
MongoDB Compass Overview
With MongoDB Compass, you can visually explore your data and run ad-hoc queries in seconds. Compass empowers you to make smarter decisions about indexing, document validation, and more. No command line needed Screen shots : MongoDB_Compass_Overview Know your data with…
MariaDB’s RHEL package installation
[ root @ dbversity : /home/mariadb ] ll -lhtr total 29M -rw-r–r– 1 root root 1.6K May 19 05:45 install -rw-r–r– 1 root root 25K May 19 05:45 rh-mariadb101-mariadb-config-10.1.13-1.el6.x86_64.rpm -rw-r–r– 1 root root 60K May 19 05:45 rh-mariadb101-mariadb-common-10.1.13-1.el6.x86_64.rpm -rw-r–r– 1…
How the ICIJ Used Neo4j to Unravel the Panama Papers ?
Webinar | Thursday, May 26th How the ICIJ Used Neo4j to Unravel the Panama Papers Webinar Thursday, May 26th 9:00 PDT | 18:00 CEST Register here for the On-Demand Recording Register Now Involving 2.6 TB of data and…
DBVersity MongoDB Assessment tests
Download at : DBVersity_MongoDB_Assessment_papers DBVersity MongoDB Assessment MongoDB manages collections of _________ like documents which are internally stored in binary format referred to as BSON? XML JavaScript HTML JSON All of above Purpose of MongoDB Replication…