Si hace algunas semanas nombrábamos de pasada el dato en la conferencia de Mateo Valero, en la historia se muestran unos cuantos números para que nos hagamos una idea de lo que estaríamos hablando:
La web personal: guardar todas las páginas que visitamos.
I've been on the Web for almost 12 years. Assume a high estimate of the average number of web pages I've visited per day, like 100. I don't know what average web page size is, but average web page size used to be 60k a few years ago. Let's call it 100k now to account for bigger images now available due to wider broadband adoption, knowing full well that like the average of 100 pages a day I read, the estimate is high. That would make an upper bound on the size of the Personal Web I've personally seen is 12 x 365.25 x 100 x 100k = 4383 days x 100 pages/day x 100,000 bytes/page = 43,830,000,000 bytes, or less than 44 Gigabytes.
12 años de navegación en una quinta parte del disco duro que viene con un PC de los que podemos comprar ahora, sin comenter un gran exceso.
Vamos un poco mas allá, no sólo guardamos las páginas visitadas, sino el contenido completo de los sitios que las alojan:
Let's be conservative and say I visit an average of 50 websites a day, year after year, but how many of those are unique? Let's conservatively say I discover on average 10 new web sites a day -- and I know that number is high if I average it over decades. How big is the average website? Let's be really conservative and say that it's 1000 pages. Using our earlier assumption of 100k per page, I have 10 new sites/day x 1000 pages/site x 100k bytes/page, or 1 Gigabyte per day on average of new material to add to the store of all information around the periphery of my Personal Web. Over 12 years (or 4383 days) the upper bound on the amount of storage I would have needed to save my PersonalWeb++ is therefore less than 4.4 Terabytes. Uncompressed. Which seems small if I have a 100 Terabyte hard drive at my disposal.
Pero ... ¿Cuánto de eso leeremos?
29,220 days times 720k per day is 21,038,400 kilobytes that I could read in a lifetime. In other words, with my wildly conservative estimates an upper bound on the amount of text I could possibly read in a lifetime is 21 Gigabytes.