an aggregator for blogs about MongoDB

Multi-AZ Support / Auto Failover for Amazon ElastiCache for Redis

Like every AWS offering, Amazon ElastiCache started out simple and then grew in breadth and depth over time. Here's a brief recap of the most important milestones:

  • August 2011 - Initial launch with support for the Memcached caching engine in one AWS Region.
  • December 2011 - Expansion to four additional Regions.
  • March 2012 - The first of several price reductions.
  • April 2012 - Introduction of Reserved Cluster Nodes.
  • November 2012 - Introduction of four additional types of Cache Nodes.
  • September 2013 - Initial support for the Redis caching engine including Replication Groups with replicas for increased read throughput.
  • ...


260,000 Students Later: MongoDB University Celebrates its Two Year Anniversary

By Shannon Bradshaw, Director of Education at MongoDB

We’re at MongoDB SF 2012 and Andrew Erlichson has a crazy idea. “Let’s create free online classes on MongoDB and make them available to everyone in the world.” CEO Dwight Merriman and President Max Schireson love the idea, and within days a small team at MongoDB begins building out the first two courses, M101 and M102.

In October 2012, we open enrollment for the first MongoDB University courses. Andrew and Dwight announce the courses over a webcast from New York City. By the time Andrew and Dwight walk from the webcast back to their desks 1,000 people have already registered for the inaugural courses.

Two years later, we’...


Sharding Pitfalls Part III: Chunk Balancing and Collection Limits

In Parts 1 and 2 we have covered a number of common issues people run into when managing a sharded MongoDB cluster. In this final post of the series we will cover a subtle, but important distinction in terms of balancing a sharded cluster as well as an interesting limitation that can be worked around relatively easily, but is nonetheless surprising when it comes up.

6. Chunk balancing != data balancing != traffic balancing

The balancer in a sharded cluster cares about just one thing:

Are chunks for a given collection evenly balanced across all shards?

If they are not, then it will take steps to rectify that imbalance. This all sounds perfectly logical, and even with extra com...


MongoDB – Estratégias de índices para escalabilidade

Como consultor, tenho atendido diversas empresas que estão utilizando MongoDB. Um problema bastante comum é o crescimento exponencial da base que causa certa lentidão na leitura e gravação dos dados que estão no MongoDB. Em quase todos os casos, essa lentidão acontece por erros básicos na implementação do MongoDB, seja no schema design ou na […]

O post MongoDB – Estratégias de índices para escalabilidade apareceu primeiro em Christiano Anderson.


MongoDB – Estratégias de índices para escalabilidade

Como consultor, tenho atendido diversas empresas que estão utilizando MongoDB. Um problema bastante comum é o crescimento exponencial da base que causa certa lentidão na leitura e gravação dos dados que estão no MongoDB. Em quase todos os casos, essa lentidão acontece por erros básicos na implementação do MongoDB, seja no schema design ou na […]

O post MongoDB – Estratégias de índices para escalabilidade apareceu primeiro em Christiano Anderson.