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Backup: why do it and how?
Paulo Nuin, Dec 16th 2008(Bio)Informatics Seminar Series
local/internal
external
on the “cloud”/third-party
costs money
saves money
internal/local
an extra HDD
tape drive
CD-RW
USB-key (larger size)
an extra HDD
“cheapest” solution, fast
most computers are set
risk: moderate/high
tape drive
inexpensive, slow
requires special drives
risk: moderate
CD-RW
almost free, slow, laborious, inefficient, small
already installed in most systems
risk: high
USB-key
expanding in size, but still small
portable
risk: low/moderate
external
external HDD
external computer
fileserver
external hard disk
relatively cheap, relatively fast
home made or factory ready
risk: moderate
external computer
requires another system, fast (depends)
not exactly expensive or cheap
risk: moderate
fileserver
expensive, fast, reliable
did I mention it’s expensive?
risk: low
on the “cloud”/third-party
company provided
community provided
free solutions
company provided
=paid
Amazon S3 (simple storage service)
charges storage, transfer, extremely reliable
community provided
institution, department, etc
usually free
limited space?
free solutions
limited space, usually slow
did I mention free?
can be upgraded or combined
