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I would like to learn how to properly design MongoDB documents. I know about MongoDB manual with special section about document design. Where can I find some practical examples of documents for social networks, cms sites, logging applications? Code that I can look into and learn from.
Thanks for your time and have a nice day!
Please check this out if you really want to see a detailed approach from mongodb's creators; this is really good: http://docs.mongodb.org/ecosystem/use-cases/ .
MongoDB has some great talks with examples. I would particularly concentrate on the schema design talks.
I bought a book on Amazon titeled MongoDB Applied Design Patterns from Rick Copeland. It is a "short" book with practical use cases on how to use MongoDB. It describes practically how to use MongoDB in CMS, social networking, online gaming, ecommerce, etc... Exactly what I was looking for. :)
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I have been looking around for powerful raytracing interfaces and discovered references to OpenRT but can't seem to find it anywhere. Does it even still exist?
If it is gone, what is the most used library for raytracing that is powerful enough for realtime rendering.
My answer below is all I have managed to find.
Update
I have continued my search and only seem to find OpenRL as it supports most of what I need. However I may end up writing my own wrapper or engine that suits my needs as there seems to be no mature solution. Thanks for the suggestions.
PowerVR Wizard GPUs by Imagination Technologies have been announced recently.
"Wizard is essentially an extension of Imagination’s existing PowerVR
Series6XT Rogue designs, taking the base hardware and adding the
additional blocks necessary to do ray tracing"
Possible, and seems to be the only, solution I have found is OpenRL.
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I am planning to create a website which will contain number of documents and each document can be tagged with one or more tags.
I am planning to use mongodb for this. So can you guys suggest me how should I design the backend in mongodb means the database design.
Also could you please suggest any example website which has such kind of functionality that I can use as reference.
Thanks in advance
A very much visible example for this would stackoverflow itself.
It has questions which have many tags.
Example:
{_id:123,link:url,subject:'test subject',desction:'test description',tags:[{name:'mongodb',desc:'mongodb'},{name:'groovy',desc:'groovy'}]}
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what is the best documented and stable version of nosql technology to use with python or maybe with another programming languages ?
Are there any good tutorials ?
Many thanks.
The two most popular are MongoDB and Redis.
If you have a specialized need there are other choices that are better. But in general those two is what most people want.
There is no unique "NoSQL" solution which fits all requirements. You need to provide more information on what you want to achieve so we can guide into a specific direction.
Nonetheless here are some good databases (which all target a different market actually):
MongoDB, CouchDB, Redis, Cassandra, Riak
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What book would you recommend on the distributed computing concepts/database internals used with Cassandra?
A list of concepts and defintions are listed at this Cassandra glossary
Thanks!
Since Cassandra is a mix between Amazon Dynamo and Google BigTable I suggest you go ahead and read the research papers about these systems:
Dynamo: Amazon’s Highly Available Key-value Store
Bigtable: A Distributed Storage System for Structured Data
Read the Dynamo paper first. Concepts like Quorum, Read Repair, Eventual Consistency, etc. are explained very well there. After that read the Big Table paper. If you don't understand some of the terms used in these papers go ahead an google for them.
Check out the nosql summer reading list for a bunch of good papers on nosql concepts. http://nosqlsummer.org/papers
Although it doesn't delve much into the concepts, note that there is an O'Reilly book dedicated to Cassandra. It's OK, but not up to the usual O'Reilly standard in some places. The explanation of the detailed architecture is rather chaotic and hard to follow.
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is there any well written perl open source out there (not using any kinda of framework) that i could use as sample for learning and good pratice of the perl...
I've searched around and found many things for PHP, but nothing in perl that uses no framework.
Thanks in advance.
Have you tried browsing CPAN? You can find code there doing pretty much anything, and many distributions post links to their github repositories, so you can follow along in the development process.
CPAN Ratings has reviews and rankings of a large number of releases, which helps you differentiate between good releases and bad ones, but being able to make this determination for yourself would be best, which you get through learning and experience.