Data Explosion The digital universe was ~281 exabytes (281 billion gigabytes)in 2007;it would grow 10 times by 2011 Images and video,captured by over one billion devices (camera phones),are the major source To archive and effectively use this data,we need tools for data categorization http://eon.businesswire.com/releases/information/digital/prweb509640.htm http://www.emc.com/collateral/analyst-reports/diverse-exploding-digital-universe.pdf 尚Data Explosion • Th di it l i 281 b t The digital universe was ~281 exabytes (281 billion gigabytes) in 2007; it would grow 10 times by 2011 • Images and video, captured by over one billion d i ( h ) th j devices (camera phones), are the major source • To archive and effectively use this data, we need tools for data categorization http://eon.businesswire.com/releases/information/digital/prweb509640.htm http://www.emc.com/collateral/analyst-reports/diverse-exploding-digital-universe.pdf