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OSS Bandwith Calculation

clamparth
2,908 Views

Is there a seizing tool for the bandwith required if we use OSSV to backup file server data over the WAN? We currently have 1.5TB with a daily change rate of 5-7GB.

Thanks

3 REPLIES 3

reide
2,908 Views

Yes.  It's called a calculator.    In all seriousness, your assigned NetApp Systems Engineer should have access to a utility called "Quick Bandwidth Wizard" in his Synergy 3.0 tool. This individual can assist you. In the meantime, you can take a swag at this calculation:

( 7 GB of changed blocks / 8 hour backup window )  =  917.5 MB/hr   / 60 minutes = 15.3 MB/minute / 60 seconds = 254.8 KB/sec. So you would need a WAN link capable of sustaining 255 Kilobytes (2040 kilobits) per second for 8 hours.  So if your backup window was only 8 hours, a T1 link capable of 1.544 megabits per second ( 193 Kilobytes per sec) wouldn't quite cut it.

Here is a handy tool you can use to determine the type of WAN link you'd need.

http://www.ibeast.com/content/tools/band-calc.asp

reide
2,908 Views

I forgot to mention that the Synergy 3.0 bandwidth wizard also factors-in things like WAN latency, packet size and packet loss so it is much more accurate than my example above.

clamparth
2,908 Views

Hi Reide

Yup that helpded thank you for the answer.

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