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We are thinking of moving from Oracle database to Cassandra. Is a there a step by step techniques to design Cassandra tables based on what we have in Oracle ?
You should look some slides by Patrick McFadin about modeling techniques, it should definitely help :
The Datamodel is dead, long live the data model
Become a super modeler
The world' next top data model
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With Neo4j we can create nodes with shape circle. But how can I create nodes such as Squarer, Cube types?
Thanks!
The Neo4j browser only has a single shape. You'll have to build your own visualization to get anything further.
Possible starting points for building such a visualization include:
d3.js (you already put the tag on the question)
vis.js
Cytoscape
sigma.js
Linkurious
and more
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Which is the best way to export huge data from Oracle DB and load into teradata db?
I would suggest using Teradata Parallel Transport. It offers different operators to move data depending on your needs and volume of data. It may be possible to accomplish this via named pipes so that you don't have to physically land the data to disk before loading it into Teradata.
I would recommend reading the information available about TPT and rephrase your question accordingly once you have a general direction in which you would like to proceed. This article on Teradata's Developer Exchange is a few years old but provides you a foundation from which you can move forward.
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This is a trivial question - but something I always miss in the day-to-day programming.
Is there a gook lookup reference available for the common algorithms that we usually face in our everyday programming - sorting,sequences,graphs.
The emphasis is more on the applicability and pseudocode ,rather than the mathematical proofs(which I find is what books tend to stress on).
The idea is to keep a ready reference,as and when we need to resort to one of these algorithms into our respective development project and languages.
Dictionary of Algorithms and Data Structures
How about this?
List of algorithms#Wikipedia
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HI
Are there any free comparison papers for ETL tools.
thanks
Ben
Kettle from Pentaho is an open source ETL tool that you can look into. Here are some comarision links
http://www.jonathanlevin.co.uk/2008/03/open-source-etl-tools-vs-commerical-etl.html
Commercial: http://www.etltool.com/
comparision from pentaho itself: http://www.pentaho.com/docs/informatica_pentaho_etl_tools_comparison.pdf
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what is the work flow of page rank algorithm?
Have a look at "The Anatomy of a Large-Scale Hypertextual Web Search Engine" by Sergey Brin and Larry Page.
Have a read of the simplified algorithm section here.