I am curious to know how many copies of user data are maintained by majors like facebook, google, Microsoft, Yahoo etc. Is it really practical to expect a total data loss from these Biggies ?
Pretty sure Google by default keep around 3 separate copies.<p>One copy on a particular server, another copy on a server in the same 'rack', and another copy either in another site or on a different rack.<p>Then there's whatever backups they do daily etc.