Various Amazon S3 questions
I just got an Amazon S3 account and I am developing my production backup script / strategy and just had a few questions.
- Monthly Storage - how exactly is this measured, and when? Is it a snapshot based thing where at a particular time your usage is measured? IE what is stopping someone from keeping a 2GB file there for 29 days out of the month, then deleting it when billing comes around? I would assume this is pro-rated or something?
- Rates - "$0.150 per GB - first 50 TB / month of storage used" . To confirm - if i keep 2GB of data in my bucket for one month, my bill is $0.30, but if I clean it out to be only 1GB when next month comes around, my bill will drop to $0.30? This sort of ties in to my last question about at what point storage is measured.
- FTP - there is no FTP access to my buckets at all? How come this is restricted?
Edit: One last one - I know it is WIDELY used, but just how reliable is this service? Are there any guaruntees that Amazon offers upon sign up? Has it ever gone down?