[thechat] Online Backup

Matt Warden mwarden at gmail.com
Wed Dec 1 10:09:37 CST 2010

On Wed, Dec 1, 2010 at 9:39 AM, Mohan Arun L <marun2 at gmail.com> wrote:
> Why online backup?
> Unless you are going to need file sync with all the devices you are using, I
> would advise investing in a USB external storage drive.
> They are less than $100 these days for a reasonable capacity of 1 TB.

Do the math on redundant backup and you'll understand why online is a
better option. Bandwidth really isn't an issue, as almost every online
backup option does differential backups.

"Amazon S3 provides a highly durable storage infrastructure designed
for mission-critical and primary data storage. Objects are redundantly
stored on multiple devices across multiple facilities in an Amazon S3
Region. To help ensure durability, Amazon S3 PUT and COPY operations
synchronously store your data across multiple facilities before
returning SUCCESS. Once stored, Amazon S3 maintains the durability of
your objects by quickly detecting and repairing any lost redundancy.
Amazon S3 also regularly verifies the integrity of data stored using
checksums. If corruption is detected, it is repaired using redundant
data. In addition, Amazon S3 calculates checksums on all network
traffic to detect corruption of data packets when storing or
retrieving data.

Amazon S3’s standard storage is:
Backed with the Amazon S3 Service Level Agreement.
Designed to provide 99.999999999% durability and 99.99% availability
of objects over a given year.
Designed to sustain the concurrent loss of data in two facilities."

Matt Warden
Austin, TX, USA

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