Some Amazing fact about memory (petabyte,exabyte,zettabyte) And How much data exists on the Web?

Now the Digital world is growing to fast that our need for storing data is increasing day by day. I remember once our computer teacher told that he purched a  Personal Computer XT/370 and paid more then a lakh for it and cobtainns 512K of memory chips.but Now you can you can find 64bit computers with 8 gb of ram laptops . Even mobiles come with 3 Gb ram(Note 3 of samgang)

And going towards harddisk we are no more talking about GBs now its all about Terabytes . And not we stop here we moved toward Petabyte(1000 TB). I here remember
 Moore’s Law, which says that the number of transistors on a chip doubles every 1.5 to 2 years.

Let me share on intresting fact:-

The biggest photo sharing website Facebook has over 15 billion photos. For each uploaded  photo, Facebook generates and stores four images of different sizes, which translated to a total of 60 billion images and 1.5 petabytes of storage, to date this will be even greater.

 If the average MP3 encoding for mobile is around 1MB per minute, and the average song lasts about four  minutes, then a petabyte of songs would last over 2,000 years playing continuously.
    If the average smartphone camera photo is 3MB in size and the average printed photo is 8.5 inches wide, then the assembled petabyte of photos placed side by side would be over 48,000 miles long - almost long enough to wrap around the equator twice.
      One petabyte is enough to store the DNA of the entire population of the US – and then clone them, twice.
        If you counted one byte per second, it would take 35.7 million years.

        It would take 223,000 DVDs (4.7Gb each) to hold 1Pb.

        It would take 746 million 3.5-inch high-density floppy discs (1.44Mb each) to hold one petabyte; 746 billion floppy discs weigh 13,422 tonnes (if each one weighs 18g)

        Astronomical project : “The Square Kilometer Array (SKA), funded by 20 countries to the sum €1.5bn is a radio telescope that can read faint signals from the Big Bang." 
        The SKA (due to be completed in 2024), estimates Big Blue, will generate 1,376 petabytes per day, twice daily global internet traffic.

        Facebook was storing 100 petabytes one year ago, according to its IPO filing to the US Security and Exchange Commission on 1 February, 2012.

        Google processed about 24 petabytes of data per day in 2009.
         It is estimated that the human brain's ability to store memories is equivalent to about 2.5 petabytes of binary data

        How much data exists on the Web

        Now a big question raise here that if i want to download internet then what should be the size of hard-disk.
        or in other words How much data exists online?
        So here is the Answer according to some researches it is  1.2 Zettabytes (1.3 trillion gigabytes) is now stored. So if you want to download the complete data from internet and you are getting the speed of 
        100MB/sec then it willl take 380517 Years  to complete.

        This year it is estimated that 70 percent of the data coming on internet will be user genrated and it will be about  900 Exabytes.

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        Some Amazing fact about memory (petabyte,exabyte,zettabyte) And How much data exists on the Web?

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