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Don’t miss the 2nd annual MongoDB Community Open House

June 15, 2016 · by dbversity · in MariaDB, MongoDB

Maybe people from Percona at this event will be able to tell us why they are more focused on MongoDB instead of MariaDB…     View in browser     Mark your calendar! We’re excited to announce the 2nd annual…

DBVersity at Paper.li

June 10, 2016 · by dbversity · in MongoDB

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

June 6, 2016 · by dbversity · in MongoDB

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 ?

June 6, 2016 · by dbversity · 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

May 30, 2016 · by dbversity · in MongoDB

[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 ?

May 30, 2016 · by dbversity · in MongoDB

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 ?!!

May 25, 2016 · by dbversity · in MongoDB

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

May 24, 2016 · by dbversity · in MongoDB

  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

May 19, 2016 · by dbversity · in MongoDB

[ 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 ?

May 19, 2016 · by dbversity · in Neo4j

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…

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