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Closed 11 years ago.
I am working on a project and as I want it to be hassle free so I am considering using Amazon SimpleDB for the sake of simplicity. At least I can cross out DB administration.
But why there is so little info about SimpleDB on the net? As if nobody cares about it and I feel like I might be on the wrong track. Is it so unpopular? The other major NoSQL databases have a lot more coverage. What could be the reason? Is it because it is hosted? Does it lack major important features which I don't notice? Is it horrible performance-wise? Is it not durable? Why people are not very interested? Are there better alternatives for hosted NoSQL?
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Closed 9 years ago.
I'm looking for a simple RDF library for Scala. So far I've found three, which all seem to have issues:
scardf (https://code.google.com/p/scardf/) doesn't seem to be currently maintained, although it has documentation and positive comments
banana-rdf (https://github.com/w3c/banana-rdf) seems to be actively maintained, but has no docs
FeDeRate (https://dvcs.w3.org/hg/FeDeRate/summary) seems unmaintained and undocumented
Does anyone have any recommendations? I'm using Scala 2.10, and would like something light, fast and clean. I'm mostly going to be carrying out simple queries and storing stuff, but I'd like the option to work with external endpoints as well.
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Closed 10 years ago.
Japid is a fast template engine (probably 2x to 20x faster) supported by play framework, But is it better enough or stable enough to be used in production environment ? And if japid is better than why play shipped examples projects in scala?
Japid is not faster because it is written in Java. It's faster because the people who wrote it decided to spend the effort to make it faster. Scala can be just as fast.
It's also newer, and a plugin, which explains why it isn't used for the core examples for Play.
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Closed 11 years ago.
I am writing my dissertation on the topic of "Business Intelligence via Real Time Data Warehousing". I am almost done with my literature review part. Now I need to prepare a questionnaire for warehousing people to check how the installation of RTDW helped them in decision making and improving Business intelligence. Can anyone help suggest me some ideas about the type of questions I put into the questionnaire.
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Closed 11 years ago.
Is there a paper/blog-post on when to use Cassandra or Membase or Hadoop or plain old relational databases ? Is there a paper discussing the strengths/weaknesses of each, and on what scenarios either of these technologies should be chosen ?
I am thinking of writing a new webservice which will have about a million hits per day and data spanning about a few terabytes.
EDIT The NoSQL Ecosystem by Adam Marcus (from the book The Architecture of open source applications): http://www.aosabook.org/en/nosql.html
general thoughts and comparison http://www.thoughtworks.com/articles/nosql-comparison
technical comparison http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-vs-redis
a Master's Thesis - Analysis and Classification of NoSQL Databases http://scholar.googleusercontent.com/scholar?q=cache:rQlbiz6bojAJ:scholar.google.com/+comparison+of+nosql&hl=en&as_sdt=0,5&as_vis=1
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Closed 11 years ago.
I have heard that projects that use EF as their ORM mostly fail when they have huge databases and actually objects that are dealing with several mappings at the same time. Is it true that EF is still not quite ready for big enterprises?
Whoever said that didn't spend too much time working with EF. I've worked on/been involved with several projects using EF with very complex database schemas and large amounts of data and we had no issues outside of your normal problems you encounter with any ORM.