Other cloud providers let me choose the configuration of my Virtual Machines. Am I able to choose how much CPU power or Memory my instances have?
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The Windows Azure team added the capability to specify the configuration of VM instances. To quote the Windows Azure FAQs: Developers now have the ability to choose the size of VMs to run their application based on the applications resource requirements. Windows Azure compute instances come in four unique sizes to enable complex applications and workloads. Compute Instance Size CPU Memory Instance Storage I/O Performance Small 1.6 GHz 1.75 GB 225 GB Moderate Medium 2 x 1.6 GHz 3.5 GB 490 GB High Large 4 x 1.6 GHz 7 GB 1,000 GB High Extra large 8 x 1.6 GHz 14 GB 2,040 GB High Each Windows Azure compute instance represents a virtual server. Although many resources are dedicated to a particular instance, some resources associated to I/O performance, such as network bandwidth and disk subsystem, are shared among the compute instances on the same physical host. During periods when a shared resource is not fully utilized, you are able to utilize a higher share of that resource. The different instance types will provide different minimum performance from the shared resources depending on their size. Compute instance sizes with a high I/O performance indicator as noted in the table above will have a larger allocation of the shared resources. Having a larger allocation of the shared resource will also result in more consistent I/O performance. Pricing was announced at PDC 2009: Each increment in VM size is twice the hourly cost of the predecessor; i.e., Extra Large is costs 8 times the hourly price of a Small instance. (But you knew this already, Dave) --rj |
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