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Mitch Pronschinske08/06/13
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0 replies

Keeping the Transactions Lightweight in Cassandra 2.0

There's an in-depth post the Datastax about doing lightweight transactions in Cassandra. It's an interesting read for those looking into the tradeoffs between availability and consistency in their database system.

Jan Machacek08/05/13
3172 views
0 replies

Akka & Cassandra Activator

In this tutorial, I am going to use the Spray-Client, DataStacks Cassandra driver and Akka to build an application that downloads tweets and then stores their id, text, name and date in a Cassandra table

Mitch Pronschinske08/05/13
1452 views
0 replies

Music Recommendation Dataset Gist

As a followup to his "Fun with Music, Neo4j and Talend" post a few weeks ago, Rik Van Bruggen also posted a gist of his Last.fm dataset.

Mitch Pronschinske08/05/13
1097 views
0 replies

Graph Relations at Scale with Neo4j

Need an introduction to graphs, graph databases, and a NoSQL graph database like neo4j along with a graph query language – Cypher?

Ayende Rahien08/05/13
1482 views
0 replies

Reviewing Lightning Memory-Mapped Database Library: On Page Splits and Other Painful Things

The LMDB codebase is a very dense piece of code, but at the same time, it is also quite interesting. In particular, B-Trees are pretty much The Answer for a lot of on disk data structures, but they tend to be quite hard to handle properly.

Seth Proctor08/05/13
1148 views
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Replicating from MySQL to NuoDB using Tungsten Replicator

Tungsten Replicator is a software package that allows replication to be established between MySQL and another database product. This blog post describes how to configure replication between MySQL and NuoDB.

Mitch Pronschinske08/04/13
4786 views
0 replies

Getting Started with the Neo4j Batch Importer

Batch importing and processing is getting more and more popular it seems. This video, featuring DZone MVB Mark Needham, gives a brief tutorial on how to use the neo4j batch importer - a tool used to import large data sets.

Dan Wilson08/03/13
3968 views
0 replies

Using MongoDB Aggregation Framework to Filter Trello Cards

When I was helping prepare for the CFSummit conference, we organized the sessions on Trello. The MongoDB aggregation framework is a relatively new addition to the platform. Using this framework, you can group, sort, calculate and handle information gathering in the aggregate sense. Here's how I did this for the Trello JSON data.

Mitch Pronschinske08/02/13
3733 views
0 replies

Flyclops' Review of NoSQL Databases

Flyclops, a game company, recently decided that MySQL wasn't cutting it for them anymore. They tried out a bunch of different databases including CouchDB, MongoDB, Cassandra, HBase, Neo4j, DynamoDB, PostgreSQL, and a bunch more. What they finally settled on was...

Mitch Pronschinske08/02/13
6258 views
1 replies

Real-World Example Using Clojure, Datomic, Angular, and Ansible

If you're looking to learn some real-world usage scenarios for all four of these technologies all in one sweep, then look no further.

Mitch Pronschinske08/02/13
2124 views
0 replies

Redis 2.8 is SO Close!

Redis 2.8 hit release candidate 2 status this week with some of the major bugs finally getting fixed. The new release should be a welcome change given Redis' recent, and very public, incident with Twilio's billing system.

Mitch Pronschinske08/02/13
1104 views
0 replies

How to Use Riak Incorrectly

If you've tried Riak and didn't like it, or you're about to start using it, you'll want to take a look at this video to see if you were using the best practices when working with this database.

Jon Brisbin08/01/13
6313 views
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Asynchronous Datastore Manifesto

J Brisbin's work with NoSQL datastores over the last couple of years has given me some insight into the direction applications will inevitably take as NoSQL becomes the dominant data storage and retrieval method—at least for web and cloud-based applications.

Mitch Pronschinske08/01/13
2103 views
0 replies

Aerospike: A NoSQL DB Focused On Real-Time Processing

A relatively new NoSQL data store on the scene is Aerospike. They're focused on pushing the limits of SSD/Flash in-memory data processing and providing "Storm speed" (perhaps he's referring to Twitter Storm?) which is about 10 million messages a second.

Hüseyin Akdoğan08/01/13
1823 views
0 replies

The Core MongoDB Operations with Native Java Driver

This article will show you how core MongoDB operations are made using the MongoDB Java Driver version 2.11.1.

Mitch Pronschinske08/01/13
1933 views
0 replies

CouchDB and BigCouch: By Their Powers Combined

Although it's not yet in a code release, Cloudant and the rest of the Apache CouchDB community has finally finished the merging of BigCouch, a HA, fault-tolerant, clustered version of CouchDB, with the primary CouchDB Apache project. The code is now in the testing phase, which you can help with.

Mark Needham08/01/13
2143 views
0 replies

Polyglot Persistence: Embrace the ETL

Over the past few years I’ve seen the emergence of polyglot persistence i.e. using different data storage technologies for different data and in most situations we work that out up front. The main down side to this approach is that we now have to keep two data sources in sync but it’s interesting to think about whether this trade off is worthwhile...

Eric Genesky07/30/13
2217 views
0 replies

Animated Short: SQL vs. NoSQL

Here's a real quick video of the war between SQL and NoSQL methodologies.

Don Pinto07/30/13
789 views
0 replies

Couchbase Developer Days and LivePerson: Who, What and Why?

I've recently returned from a rather brilliant Couchbase trip to Israel. My colleague Tug Grall and I lead the Couchbase Developer Day held at the LivePerson offices . . .

Ayende Rahien07/30/13
573 views
0 replies

Reviewing Lightning memory-mapped database library: On disk data

As mentioned, the data in LMDB is actually stored in page. And I am currently tracking through the process in which we add a new item to the database.

Marko Rodriguez07/30/13
510 views
0 replies

Global vs. Local Graph Ranking

Graph ranking algorithms are all about mapping a complex graphical structure to a numeric vector. For a given algorithm, a single numeric value in the resultant vector corresponds . . .

Eric Genesky07/30/13
1347 views
0 replies

Managing MongoDB Clusters on AWS with Chef

Here's a discussion of how to manage large numbers of clusters using Chef roles, as well as how to automatically snapshot RAID arrays.

Esen Sagynov07/29/13
1109 views
0 replies

New CUBRID PHP and PDO drivers now support altHosts and loadBalancing

We are happy to announce that we have updated our CUBRID PHP and PDO drivers to roll out loads of improvements and bug fixes.

Eric Genesky07/29/13
1135 views
0 replies

Mapping Music with Facebook

More than 110 million songs, albums and radio stations have been played 40 billion times through apps integrated with Facebook’s Open Graph.

Eric Genesky07/29/13
868 views
0 replies

On Cascading Behavior in Complex Networks

This lecture from 2010 was presented by Jon Kleinberg of Cornell University. He focuses his discussion of cascading behavior on large social networks by . . .