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The Cloud is not a Silver Bullet

stu.mp

1–8 of 8 posts

Re: The Cloud is not a Silver Bullet

#2
Great, insightful discussion of the key problem with people building on top of AWS today - it does not solve all of your problems. You still have to have an operations strategy, a high-availability strategy and a disaster recovery strategy. All AWS does for you is save you the cost of racking and maintaining your own servers.

Re: The Cloud is not a Silver Bullet

#6
post #3

Not sure what is meant by "S3 has 11 nines of durability". Obviously not an availability number, but what is it?

99.999999999% uptime?

... which translates to 3ms of downtime in 10 years with their current data, which makes no sense.

I'm guessing it's closer to the way that telecom guys work: 1 bit error in 10^12 bits is common for fiber comm.

Re: The Cloud is not a Silver Bullet

#7
post #6

Earlier quoted context omitted.

99.999999999% uptime?

... which translates to 3ms of downtime in 10 years with their current data, which makes no sense. I'm guessing it's closer to the way that telecom guys work: 1 bit error in 10^12 bits is common for fiber comm.

Their explanation is here: http://aws.amazon.com/s3/#protecting

Looks like they're differentiating between durability ("99.999999999%") and availability ("99.99%").

So it's not uptime that has 11 9s…my mistake. Should have checked the documentation.

Re: The Cloud is not a Silver Bullet

#8
post #6

Earlier quoted context omitted.

99.999999999% uptime?

... which translates to 3ms of downtime in 10 years with their current data, which makes no sense. I'm guessing it's closer to the way that telecom guys work: 1 bit error in 10^12 bits is common for fiber comm.

Also relevant: http://stackoverflow.com/questions/4179027/99-99-durability-...