Free Large datasets to experiment with Hadoop

Question

Do you know any large dataset to experiment with Hadoop which is free/low cost? Any pointers/links related are appreciated.

Preference:

• At least one GB of data.

• Production log data of webserver.

Few of them which I found so far:

1. Wikipedia dump

2. http://wiki.freebase.com/wiki/Data_dumps

3. http://aws.amazon.com/publicdatasets/

Also can we run our own crawler to gather data from sites e.g. Wikipedia? Any pointers on how to do this is appreciated as well.

Unpredictable

datanami recently posted this list of links: datanami.com/2015/01/29/9-places-get-big-data-now - perhaps someone has time to convert this to a proper answer. – Tweeter

Answer 1

Few points about your question regarding crawling and wikipedia.

You have linked to the wikipedia data dumps and you can use the Cloud9 project from UMD to work with this data in Hadoop.

They have a page on this: Working with Wikipedia

Another datasource to add to the list is:

• ClueWeb09 - 1 billion webpages collected between Jan and Feb 09. 5TB Compressed.

Using a crawler to generate data should be posted in a separate question to one about Hadoop/MapReduce I would say.

Burette

link "Working with Wikipedia" is dead. is this replacement lintool.github.com/Cloud9/docs/content/wikipedia.html ? – Singletree

link for ClueWeb09 is dead. New link seems to be lemurproject.org/clueweb09. It looks you need to pay for the data. – Salters

Answer 2

One obvious source: the Stack Overflow trilogy data dumps. These are freely available under the Creative Commons license.

Julius

@toddlermenot - the Dumps are now hosted on the Internet Archive. I've updated the link. Read the reason why it changed on this SE Blog page. – Julius

Answer 3

This is a collection of 189 datasets for machine learning (which is one of the nicest applications for hadoop g): http://archive.ics.uci.edu/ml/datasets.html

Object

Answer 4

It's no log file but maybe you could use the planet file from OpenStreetMap: http://wiki.openstreetmap.org/wiki/Planet.osm

CC licence, about 160 GB (unpacked)

There are also smaller files for each continent: http://wiki.openstreetmap.org/wiki/World

Glossy