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Corey Goldberg is a software developer from Boston. His interests include Python, Linux, Open Source, and Testing. Corey is a DZone MVB and is not an employee of DZone and has posted 31 posts at DZone. You can read more from them at their website. View Full User Profile

Rackspace Cloud - Outbound Bandwidth Caps, Network Too Slow

05.26.2012
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Have you seen the network/bandwidth caps that Rackspace places on their cloud servers?

From the Rackspace Cloud Server FAQ:

"Your Cloud Server has a bandwidth cap that is applied in relation to the size of the server. Please note that the bandwidth caps are placed on outbound bandwidth only. Inbound bandwidth is not capped."

Server SizePublic LimitServiceNet Limit
256MB10 Mbps20 Mbps
512MB20 Mbps40 Mbps
1024MB30 Mbps60 Mbps
2048MB40 Mbps80 Mbps
4096MB50 Mbps100 Mbps
8192MB60 Mbps120 Mbps
15872MB70 Mbps140 Mbps

I was going to use the Rackspace Cloud to do some performance testing of a new server. I wanted to run 2 servers in a clustered mode, replicating data to each other. My first concern was the speed of the internal network interconnects between cloud nodes.

After doing some research, I realized the bandwidth caps make it a non-starter. 20-140 Mbps private interconnects?? That's not enough. I would saturate the network almost immediately, even on their largest server class. Sorry Rackspace.

In comparison, Amazon's EC2 Cloud offers High Performance Computing nodes with 10 Gigabit interconnects: Amazon HPC

Published at DZone with permission of Corey Goldberg, author and DZone MVB. (source)

(Note: Opinions expressed in this article and its replies are the opinions of their respective authors and not those of DZone, Inc.)

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