Amazon Elastic Compute Cloud Developer Guide General Information Technical FAQ Select from the following: • General_Information • Operation Information • IP Information • Monitoring, Errors, and Unexpected Behavior • Error Messages • Paid AMIs • Miscellaneous General Information How many instances can I launch? Each user has a concurrent running instance limit. For new users during the public beta, this limit is 20. How do I sign a request? Signing SOAP requests are discussed in the section called “Request Authentication”. Signing Query requests are discussed in the section called “Making Requests” What username do I use for the various Amazon EC2 tools? When you sign up with Amazon Web Services, you are given an AWS Account ID. This is your username. More detail is provided in the Getting Started Guide. Why do my instances take so long to start? Amazon EC2 has to move the images around the network before they can be launched. For big images and/or congested networks, this can take several minutes. Images are cached to alleviate this problem, so it should be less noticeable as you use your images more frequently. What happens to my running instances if the machines they are running on go down? The instances themselves will be terminated and will have to be relaunched. The data on the instances' API Version 2007-03-01 149
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