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Databases

A Tale of Two Databases, Revisited: DynamoDB and MongoDB 73

Posted by Unknown Lamer
from the there-can-be-only-fifty-or-so dept.
Questioning his belief in relational database dogma, new submitter Travis Brown happened to evaluate Amazon's Dynamo DB and MonogDB. His situation was the opposite of Jeff Cogswell's: he started off wanting to prefer Dynamo DB, but came to the conclusion that the benefits of Amazon managing the database for him didn't outweigh the features Mongo offers. From the article: "DynamoDB technically isn't a database, it's a database service. Amazon is responsible for the availability, durability, performance, configuration, optimization and all other manner of minutia that I didn't want occupying my mind. I've never been a big fan of managing the day-to-day operations of a database, so I liked the idea of taking that task off my plate. ... DynamoDB only allows you to query against the primary key, or the primary key and range. There are ways to periodically index your data using a separate service like CloudSearch, but we are quickly losing the initial simplicity of it being a database service. ... However, it turns out MongoDB isn't quite as difficult as the nerds had me believe, at least not at our scale. MongoDB works as advertised and auto-shards and provides a very simple way to get up and running with replica sets." His weblog entry has a few code snippets illustrating how he came to his conclusions.
Displays

Carmack On VR Latency 94

Posted by Soulskill
from the harder-better-faster-stronger dept.
An anonymous reader writes "For a while now, John Carmack has been pushing to bring virtual reality technology back to the gaming world. VR was largely abandoned over a decade ago when it became apparent that the hardware just wasn't ready to support it. In 2013, things are different; cheap displays with a high pixel density and powerful processors designed for small systems are making virtual reality a... reality. One of the last obstacles to be conquered is latency — the delay between moving your head and seeing your perspective change in the virtual world. In a lengthy and highly-technical post at #AltDevBlogADay, Carmack has outlined a number of strategies for mitigating and reducing latency. With information and experience like this being shared with the game development community at large, it shouldn't be long until VR makes a permanent place for itself in our gaming lives."

Machines certainly can solve problems, store information, correlate, and play games -- but not with pleasure. -- Leo Rosten

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