I found both these useful, all credit to the authors: Application-Driven Bandwidth Guarantees in Data Centers www.hpl.hp.com/people/jklee/Sigcomm14-CloudMirror.pdf <http://www.hpl.hp.com/people/jklee/Sigcomm14-CloudMirror.pdf> Surviving failures in Bandwidth-Constrained Datacenters http://research.microsoft.com/pubs/167565/fp285-bodikPS.pdf Roy **Roy Hirst* 425-556-5773 XKL LLC | 12020 113th Ave NE, Suite 100 | Kirkland, WA 98034 | USA * On 1/6/2015 12:49 PM, Roy Hirst wrote:
I know there is no such thing as a patient line of packets. There was recently some research done on feedback from big early adopters (hosts) that I will try to dig out if you need it. I remember that (1) user-to-data center bandwidth is much less than the resulting in-data-center bandwidth or dc-dc bandwidth (2) there are some useful metrics (ratios) for estimating bandwidth if you know the workload server GHz, installations need balance (3) Many (most?) estimates underestimate fiber bandwidth actual requirements. Roy
**Roy Hirst* 425-556-5773 XKL LLC | 12020 113th Ave NE, Suite 100 | Kirkland, WA 98034 | USA
* On 1/6/2015 12:37 PM, Bob Evans wrote:
I have a customer that heavily uses Microsoft Office 365. It's hosted. All the data I see about usage per user appears theoretical. In that the formulas assume people are taking turns using the bandwidth as if there is a patient line of packets at the Internet gas pump. Nobody is clicking at the same time. We all know that is not the real world.
Does anyone have any experience with Office 365 hosted that can tell me the practical bandwidth allocation (NOT in KB per month, but in megabits/sec) for 100 users (during normal work hours) needs to be available ?
Thank You in advance, Bob Evans CTO Fiber Internet Center