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Alec Noller07/23/14
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Redis Commands Visualized: One Good-Lookin' Database

For no particular reason at all, Redis Labs' Itamar Haber took a D3.js swing at the bulk of Redis' 160-ish commands, creating an interactive visualization of the lot of them - in Redis colors, of course. The end result is useful, but more importantly, it looks pretty cool.

Mark Needham07/23/14
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Neo4j: LOAD CSV - Processing Hidden Arrays in Your CSV Documents

I was recently asked how to process an ‘array’ of values inside a column in a CSV file using Neo4j’s LOAD CSV tool and although I initially thought this wouldn’t be possible as every cell is treated as a String, Michael showed me a way of working around this which I thought was pretty neat.

Don Pinto07/22/14
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Indexes and Selectivity

Indexes in Couchbase are a flexible means of performing back end processing. When utilizing indexes it's possible to create decision tree type aggregations and selectivity functionality, such as those found in an inventory control system.

Zardosht Kasheff07/21/14
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Introducing Ark: A Consensus Algorithm For TokuMX and MongoDB

Most of the time, our blog posts explain what’s great about the MongoDB improvements we’ve already shipped in TokuMX. Sometimes, though, it’s fun to talk about what’s coming soon, especially when user feedback would really help get the feature right.

Max De Marzi07/21/14
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Scaling Concurrent Writes in Neo4j

A while ago, I showed you a way to scale Neo4j writes using RabbitMQ. Which was kinda cool, but some of you asked me for a different solution that didn’t involve adding yet another software component to the stack. Turns out we can do this in just Neo4j using a little help from the Guava library.

Alec Noller07/20/14
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The Best of the Week (July 11): NoSQL Zone

Make sure you didn't miss anything with this list of the Best of the Week in the NoSQL Zone. This week's best include Couchbase's reasoning for choosing RxJava for the Java SDK, Redis use patterns for the SQL practitioner, group by and sorting in Neo4j's Cypher and Clojure, and more.

Ayende Rahien07/18/14
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When a Race Condition is What You Want…

I have an interesting situation that I am not sure how to resolve. We need to record the last request time for a RavenDB database. Now, this last request time is mostly used to show the user, and to decide when a database is idle, and can be shut down.

Don Pinto07/18/14
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Updates to libcouchbase 2.4

If you've been following along, a developer preview version of the library was released last month. It contained a whole bunch of improvements. Now we've made some more stability improvements to the library and fixed some minor issues along the way.

Alec Noller07/17/14
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The Best of DZone: July 9 - 16

If you missed anything on DZone this week, now's your chance to catch up! This week's best include reasons not to switch to Java 8 (yet), Raspberry Pi's new release, the Dockerized future, the downsides of Google Play Services 5.0, the good, bad, and ugly of JSON, and more.

Adam Warski07/17/14
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Making the Reactive Queue Durable with Akka Persistence

Some time ago I wrote how to implement a reactive message queue with Akka Streams. The queue supports streaming send and receive operations with back-pressure, but has one downside: all messages are stored in-memory, and hence in case of a restart are lost. But this can be solved.

A. Jesse Jiryu Davis07/16/14
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Motor 0.3.2 Released

Yesterday I released version 0.3.2 of Motor, the asynchronous MongoDB driver for Python and Tornado. This release is compatible with MongoDB 2.2, 2.4, and 2.6. It requires PyMongo 2.7.1.

Don Pinto07/15/14
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Why Couchbase Chose RxJava for the New Java SDK

This blog post explains our reasoning and motivation behind choosing RxJava as one of the integral components in our new Java SDK.

Mark Needham07/15/14
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Neo4j: Set Based Operations with the Experimental Cypher Optimizer

With the release of Neo4j 2.1 we can now make use of Ronja – the experimental Cypher optimiser – which performs much better for certain types of queries. I thought I’d give it a try.

Alec Noller07/14/14
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Redis Use Patterns & the SQL Practitioner

This talk from Itamar Haber, Chief Developers Advocate at Redis Labs, took place at DevconTLV and provides an introduction to Redis use patterns, particularly compared to a relational perspective.

Adam Fowler07/14/14
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Upcoming in MLJS…

I’ve been slowly (oh so sloooowwwwly) working on MLJS since my last release in April. Going to try to do smaller, more frequent releases in the future. Done some cool stuff for demos and my other pre-sales colleagues in MarkLogic – all based on real world customer requirements.

Don Pinto07/11/14
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Couchbase Java SDK 2.0.0 Developer Preview 2

On behalf of the whole SDK team I'm glad to announce the second developer preview of the Java/JVM SDK release train nicknamed Armstrong. It currently contains both the JVM core package "core-io" 0.2 as well as the Java SDK 2.0 preview 2.

Mark Needham07/11/14
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Neo4j’s Cypher vs. Clojure: Group By and Sorting

One of the points that I emphasised during my talk on building Neo4j backed applications using Clojure last week is understanding when to use Cypher to solve a problem and when to use the programming language. A good example of this is in the meetup application I’ve been working on.

Mikko Ohtamaa07/10/14
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Rolling Time Window Counters with Redis and Mitigating Botnet-Driven Login Attacks

This blog post presents rolling time window counting and rate limiting in Redis. You can apply it to activate login CAPTCHA on your site only when it is needed.

A. Jesse Jiryu Davis07/10/14
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Motor 0.3.1 Released

Yesterday I released version 0.3.1 of Motor, the asynchronous MongoDB driver for Python and Tornado. This release is compatible with MongoDB 2.2, 2.4, and 2.6. It requires PyMongo 2.7.1.

Andreas Kollegger07/10/14
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From the Neo4j Community: Best of June 2014

The Neo4j community once again posted tons graph-tastic stuff this past month from awesome articles to great GraphGists. Here are a few of our favorites from the Neo4j community in June:

Dustin Marx07/09/14
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Custom Cassandra Data Types

Cassandra has numerous built-in data types, but there are situations in which one may want to add a custom type.

Dharshan Rangegowda07/09/14
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MongoDB Shards and Unbalanced Aggregation Loads

In the 2.6 release, MongoDB made a subtle but significant change in the way the underlying aggregation pipelines execute in a sharded environment.

Chris Chang07/08/14
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Using Fluentd and MongoDB serverStatus for Real-Time Metrics

When our friends over at Treasure Data wrote to me about Fluentd, an open-source logging daemon written in Ruby that they created and maintain, I immediately saw value for MongoDB users looking for a quick way to collect data streams and store information in MongoDB.

Alec Noller07/07/14
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The Achilles' Heel of NoSQL

NoSQL is big business, but according to John A De Goes, it has a fatal flaw in its lack of analytics tooling. Given that SQL is working to incorporate some of the advantages of NoSQL, what will happen as the divide between the two becomes narrower?

Chris Chang07/07/14
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Production-ready MongoDB Replica Sets on Google Cloud Platform

Recently Google, MongoDB Inc., and MongoLab announced the arrival of fully-managed, production-ready MongoDB replica set plans on the Google Cloud Platform (GCP). These plans are hosted on Google Compute Engine (GCE) and managed by MongoLab.