How Big is google’s database

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How Big is google’s database

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Google search crawler uses 850 TB of information, so that’s the amount of raw data from the web.

Google Analytics uses 220 TB stored in two tables: 200 TB for the raw data and 20 TB for the summaries.

Google Earth uses 70.5 TB: 70 TB for the raw imagery and 500 GB for the index data.

The second table “is relatively small (500 GB), but it must serve tens of thousands of queries per second per datacenter with low latency”.

Personalized Search doesn’t need too much data: only 4 TB.
Personalized Search stores each user’s data in Big table.
Each user has a unique user id and is assigned a row named by that user id.
All user actions are stored in a table.

Google Base uses 2 TB and Orkut only 9 TB of data.
If we take into account that all this information is compressed. For example, the crawled data has compression rate of 11%, so 800 TB become 88 TB, Google uses for all the services mentioned before 220 TB.

It’s also interesting to note that the size of the raw imagery from Google Earth is almost equal to the size of the compressed web pages crawled by Google.


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2 Comments

David

July 21, 2009 at 8:09 pm

nice post – very informative!

mike

November 10, 2010 at 6:14 am

Google is so impressive I really cannot get over the amount of data they have, The search’s they catalog. By 2020 Google will search for 80% Of internet traffic, World wide. Main storage data center will be over 50,000 Plus Terabytes. It wont be long before Google will be on board the Space station, Then mars by 2030. Google you rule

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