Q

Calculating downtime in simple redundant networks

I have a simple redundant network of path A and path B. Using RBDs, I show this as path A in parallel with path B. So I'd have to have a failure in path A and B at the same time before my availability would be affected. In reality however, a failure in path A would cause a 30 second outage (downtime) while the software re-routes traffic down path B. Any ideas how I account this in my RBDs and availability calculations?
As with all downtime, you calculate it from a user's perspective. Can the user get his job done during the outage? If not, then you must count the 30 seconds as downtime. As far as the user can tell, it is no less downtime than occurs during a server crash.
This was first published in September 2004

Dig deeper on Storage Resources

Pro+

Features

Enjoy the benefits of Pro+ membership, learn more and join.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

0 comments

Oldest 

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:

-ADS BY GOOGLE

SearchSolidStateStorage

SearchVirtualStorage

SearchCloudStorage

SearchDisasterRecovery

SearchDataBackup

Close