Cassandra vs. MongoDB

see http://db-engines.com/en/ranking_trend
Cassandra vs. MongoDB Are you considering Cassandra or MongoDB as the data store for your next project?  Would you like to compare the two databases?  Cassandra and MongoDB are both "NoSQL" databases, but the reality is that they are very different . They have very different strengths and...



Introduction to Redis Data Structures: Bitmaps

Binary background
Bitmaps (also called bit arrays, bit vectors etc.) is the data structure that immediately pops in your head when the need is to map boolean information for a huge domain into a compact representation.  It is a very popular data structure whenever memory space is at a premium: OS kernels (memory...

Understanding Mongodb backup options

backup
Backup and restore workflows are extremely important for any production MongoDB cluster. Apart from the actual functionality of backup and restore you also have to consider other non functionals like availabilty of backups, security, recovery time, recovery granularity etc. At a high level you...

Managing long running operations in MongoDB

Managing long running operations in MongoDB
MongoDB gives you a number of tools to manage long running operations in the system. It is extremely important to keep track of operations running on your production server at any point of time - in some cases you might have rouge queries or index builds that are killing the performance of your...



Analyzing slow queries in MongoDB

MongoDB slow query analyzer
We are happy to announce the public availability of our slow query analyzer for MongoDB! Using the slow query analyzer you can quickly identify slow queries on any of your servers in a particular period of time. By default "slow queries" are defined as queries that take longer than...