…CouchDB, because we are a database, people often asked us to add features that were in traditional RDBMS's, but didn't fit well with the CouchDB data model. Not being intimately familiar with CouchDB's model and how it all fits together, they don't realize that what they're asking for simply doesn't work. But because we explicitly stated on the project site we aren't a relational database and aren't trying to replace relational databases, it made it …
- Engine Yard Ruby on Rails Blog: Key-Value Stores in Ruby: The Wrap Up
- till's blog: PHP: So you'd like to migrate from MySQL to CouchDB? - Part I
- Viget Extend : The Development Lab: Around "Hello World" in 30 Days
- High Scalability: Poppen.de Architecture
- : jQueryConf 2009
- Me Dev, You Jane: Power CouchDB - Basic HTTP Handlers
Why NoSQL Matters
" NoSQL" is a label which encompasses a wave of innovation now happening in the database space. The NoSQL movement has sparked a whirlwind of discussion, debate, and excitement in the technical community. Why is NoSQL generating so much buzz? What does it mean for you, the application developer? And what place does NoSQL have for apps running on the Heroku platform?
SQL (the language) and SQL RDBMS implementations ( MySQL, PostgreSQL, Oracle…
- Viget Extend : The Development Lab: Around "Hello World" in 30 Days
- Vineet Gupta | Computer Programmer: NoSql Databases - Part 1 - Landscape
- paperplanes: Relational Data, Document Databases and Schema Design
- I can't code! Now what?: Redis is great
- Intridea - Company Blog: Friday Coffee Hour at Intridea
- Engine Yard Ruby on Rails Blog: Key-Value Stores in Ruby: The Wrap Up
A relational OLAP (or ROLAP) server uses data stored in an RDBMS. These systems trade the performance of a multidimensional store for the convenience of an RDBMS. These servers almost always query over a database which is structured as a STAR or snowflake type schema. To go back to the sales analysis example above, in a STAR schema the facts about the sales would be stored in the fact table, and the list of customers and products would be stored in separate dimension …
- How Software is Built: Interview with Brian Gentile - CEO of Jaspersoft
Relational databases know how to manage relational data. That's what they do, it's in their name. Referential integrity ensures that a child row always has a valid reference to a parent row. If a child has parent_id of 1, then a parent with an id of 1 is guaranteed to exist. Referential integrity has been a solved problem for decades using foreign keys. It is a proven fundamental property of solid applications, yet Rails has no best practice for using them. Rails has tried to reinvent …
- Jake Scruggs: Rails Conf 2010 Day 2
- Eddorre.com: Tutorial: Filtering Results with jQuery UI Slider and Rails 3 Beta 3
- The Hobo Blog: Interview for InfoQ
- Simone Carletti's Blog: Unobtrusive JavaScript in Rails 3
- Riding Rails - home: Ruby on Rails 2.3.8 Released
- The Queue Blog: Link dump for June 5th through June 6th
Relational Databases are all about the Data
Yes, they are. They are about trying to fit your data into a constrained schema, constrained in length, type, and other things if you see fit. They're about building relationships between your data in a strongly coupled way, think foreign key constraints. Whenever you need to add data, you need to migrate your schema. That's what they do. They're good at enforcing a set of ground rules on your data.
See where I'm going with this? …
- MySQL Performance Blog: Extending Index for Innodb tables can hurt performance in a surprising way
- Travis Dunn: acts-as-taggable-on Table Indexes
- railsexpress.de: Roll your own SQL session store
- JJinuxLand: Rails: seeds.rb and rake db:test:prepare
- How Software is Built: Interview with Amr Awadallah - Cloudera CTO
- Steve's Blog: Selenium and Ruby: They actually work together!
About five years ago, I was done with a startup and decided I didn't want to take a normal job. Relational databases were everywhere at that point, and MySQL was getting insanely popular. I had a lot of fondness for the LotusNotes platform, although it was very much the ugly duckling.
I saw all of its warts, but I also saw that it had some beauty, and I wanted to take that beautiful part and bring that into the modern open source web. I quit my paid software career and moved my family …
- Damien Katz: Replication
- There's no Place Like ::1: Two more contributions to the open source world
- paperplanes: Redis and Rails sitting on the Couch
- A Fresh Cup: Double Shot #633
- Ruby on Rails Podcast: RailsConf Europe: Jacqui Maher, Pat Allan and Intridea - Ruby on Rails Podcast
- Binary Logic: Authlogic: keeping you in the loop
Creativity & Constraint - Neal Ford
"Some of the 'facts' in this talk may in fact be harmless lies" - disclaimer of @ neal4d # railsconf
This disclaimer needs to be in front of all keynotes.
I'm Not Old, I'm seasoned. @ neal4d # railsconf
Me too buddy, me too.
"The right community to suggest something really weird to" @ neal4d # railsconf
RT I so wanna go to Neal Ford's halloween party! # railsconf
Constraints are liberating: …
- Softies on Rails - Home: RailsBridge
- igvita.com: Distributed Ruby with the MagLev VM
- Locomotivation: Same train, new station
- Litany Against Fear: RailsConf 2009 And the Greatest of these is Rack Support
- Freelancing Gods: Rails Camps - Coming to a Country Near You
- Orlando Ruby Users Group: Meeting Thursday May 13th
Nodes: a node is basically an entity as RDBMS people (like probably you and I) are familiar with. A node could represent a person, customer, blog post, photograph, video or tweet. It isn't always true, nor is it a good idea to think of graph database concepts only in terms of RDBMS concepts, but we could consider most tables that do not represent an actual relationship or association between other tables as an entity. It is a simplification, so use only in this initial learning phase …
- Vineet Gupta | Computer Programmer: NoSql Databases - Part 1 - Landscape
- igvita.com: Future of RDBMS is RAM Clouds & SSD
- High Scalability: Paper: High Performance Scalable Data Stores
- elc technologies - Blog : Ruby on Rails, iPhone, Flash, Agile, Interactive Design: Amazon Reduces S3/EC2/Data transfer prices
- A Fresh Cup: Double Shot #573
- starjuice - Home: Saving Uploaded Images to the Database
…AE service runs during "major compactions" (the equivalent of rebuilding a table in an RDBMS) so it is a relatively heavyweight process that runs infrequently. AE uses a Merkle Tree to determine where within the tree of column family data the nodes disagree and then repairs each of those branches.
This is the last post in my series on Cassandra. I hope you enjoyed them! Please leave a comment if you have questions or if I've made an error above.
- paperplanes: NoSQL And You - Thoughts On Finding Right Partner In Chrime
- Rails Envy ยป Home: Rails Envy Podcast - Episode #099
- High Scalability: 1 Billion Reasons Why Adobe Chose HBase
- Axon Flux // A Ruby on Rails Blog: WTF is a SuperColumn? An Intro to the Cassandra Data Model (Arin Sarkissian explains)
- castilhor blog: Digg Says Yes To NoSQL Cassandra DB, Bye To MySQL
- Ruby News: Red Dirt RubyConf 2010
…especially when the data application is just as concerned with connections between entities (aka records in RDBMS or nodes in graph databases) than just the entities themselves.
First off I want to look at the inherent problems with modelling real world data in relational databases and how the approach of graph databases can overcome many, if not all, of these problems. Then I will launch into a specific snippet of code to demonstrate modelling marriages that can be between any two consenting …
- Ruby, Javascript, Erlang blog: Snakes, Gems & Coffee: DRAFT: Why proponents of marriage equality should love graph databases, Part 2: A Reply to 'The Database Engineering Perspective
- The Real Adam: Give attribute_mapper a try
- Litany Against Fear: RailsConf 2009 Rails 3 Step off of the Golden Path
- Locomotivation: TweetSaver.com Launched on MongoDB, MongoMapper
- Open Sourcery: Driving Business Processes in Ruby
- Freelancing Gods: A Month in the Life of Thinking Sphinx