velocity pertains not only to how quickly data is generated, but also to how quickly someone interprets and acts upon it

"Big velocity" means "drinking from a firehose" - http://cacm.acm.org/blogs/blog-cacm/157589-what-does-big-data-mean-part-3/fulltext

Hi Hassan,

You may find the following frameworks worth checking:

• Apache Spark: http://spark.apache.org
• Storm: https://storm.incubator.apache.org
• Dempsy: http://dempsy.github.io/Dempsy/  
• Samoa: http://samoa-project.net
• Impala: http://www.cloudera.com/content/cloudera/en/products-and-services/cdh/impala.html
• Elasticsearch: http://www.elasticsearch.org

There are many other solutions in case you combine appropriate databases(like MongoDB, SciDB), data structures(like Bloom Filter: http://en.wikipedia.org/wiki/Bloom_filter ) and algorithms( Like Count–min sketch: http://en.wikipedia.org/wiki/Count–min_sketch ). The problem you are trying to solve will determine which combination will work.

Update: I found a long list of tools/libraries for big data: https://github.com/onurakpolat/awesome-bigdata Many parts of it are relevant to  velocity dimension of big data.

Greetings,

Ali

On social media sometimes a few seconds old messages (a tweet, status updates etc.) is not something interests users. They often discard old messages and pay attention to recent updates. The data movement is now almost real time and the update window has reduced to fractions of the seconds. This high velocity data represent Big Data.

To gain the right insights, big data is typically broken down by three characteristics:

• Volume: How much data
• Velocity: How fast data is processed
• Variety: The various types of data

Imagine when the usage time of data storing is much more than the needed response time from computing.  

velocity pertains not only to how quickly data is generated, but also to how quickly someone interprets and acts upon it

As per my knowledge,  reply from @Muddsair Sharif is the best answer so far. It sounds quite professional and expert reply.

"Velocity"  means generation of data in very fast manner.... i.e.within few seconds large amount of data is generated from different websites(e-commerce, social etc...) and network(wired, wireless, mobile......)

why physics (statistical mechanics) does not help to answer?

Hi,

     i have enclosed a picture for you to understand better about velocity!

Regards

Muddsair