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May 18 2011

Ta-da! Here is my thesis. : validates_presence_of :purpose

The title is “Implementation of a distributed application using the document-oriented database CouchDB — An outliner as a replicable distributed system” (originally “Umsetzung einer verteilten Anwendung mit der dokumentenorientierten Datenbank — CouchDB Ein Gliederungseditor als replizierbares Verteiltes System”).

June 17 2010

March 15 2010

Visual Guide to NoSQL Systems - Nathan Hurst's Blog

There are so many NoSQL systems these days that it's hard to get a quick overview of the major trade-offs involved when evaluating relational and non-relational systems in non-single-server environments. I've developed this visual primer with quite a lot of help (see credits at the end), and it's still a work in progress, so let me know if you see anything misplaced or missing, and I'll fix it.

December 30 2009

Terrastore - Scalable, elastic, consistent document store.

Terrastore is a new-born document store which provides advanced scalability and elasticity features without sacrificing consistency.

Here are a few highlights:

  • Ubiquitous: based on the universally supported HTTP protocol.
  • Distributed: nodes can run and live everywhere on your network.
  • Elastic: you can add and remove nodes dynamically to/from your running cluster with no downtime and no changes at all to your configuration.
  • Scalable at the data layer: documents are partitioned and distributed among your nodes, with automatic and transparent re-balancing when nodes join and leave.
  • Scalable at the computational layer: query and update operations are distributed to the nodes which actually holds the queried/updated data, minimizing network traffic and spreading computational load.
  • Consistent: providing per-document consistency, you're guaranteed to always get the latest value of a single document, with read committed isolation for concurrent modifications.
  • Schemaless: providing a collection-based interface holding JSON documents with no pre-defined schema, you can just create your collections and put everything you want into.
  • Easy operations: install a fully working cluster in just a few commands and no XML to edit.
  • Features rich: support for push-down predicates, range queries and server-side update functions.

Read, participate, download and clone it!

November 10 2009

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