Release: Elastic Load Balancing on 2009-11-11

Release Notes>Release: Elastic Load Balancing on 2009 11 11
New AWS SDK for .NET.


Submitted By: cheriaws
Release Date: November 11, 2009 12:00 AM GMT
Latest Version: 2009-05-15
Created On: November 11, 2009 6:50 PM GMT
Last Updated: November 12, 2009 4:40 AM GMT

New Features

Feature Description
AWS SDK for .NET AWS now provides libraries, sample code, tutorials, and other resources for software developers who prefer to build applications using .NET language-specific APIs instead of Query or SOAP. These libraries provide basic functions (not included in the Amazon Elastic Load Balancing Query or SOAP APIs), such as request authentication, request retries, and error handling so that it's easier to get started. For more information about language-specific libraries and resources, go to Programming Language Support in the Amazon Elastic Load Balancing Developer Guide.


Known Issues

Issue Description Impact
1 Elastic Load Balancing is a feature of Amazon Elastic Compute Cloud (EC2). You must be signed up for Amazon Elastic Compute Cloud (EC2) service in order to call the Elastic Load Balancing APIs.
2 The Amazon CloudWatch Latency metric for a LoadBalancer aggregates the latency for all requests to all LoadBalancer ports (Listeners ) into a single metric. If you have a LoadBalancer that is handling traffic on multiple ports, you cannot view the Latency of the requests for each port. Moreover, for LoadBalancers with TCP listeners, the Latency metric is not a meaningful measure of the TCP request latency.
3 When an Availability Zone is removed from the LoadBalancer, instances in that Availability Zone might continue to take traffic after they are described as OutOfService by DescribeInstanceHealth. Instances might continue to take traffic for a short period after the Availability Zone is removed from the LoadBalancer.
4 A LoadBalancer might not fail traffic away from an Availability Zone if all the instances in a given Availability Zone fail health checks. In the event that all your instances in an Availability Zone fail, traffic will still be routed to the failed Availability zone and those requests will fail.
5 When instances are registered with a LoadBalancer, they are assumed to be healthy. Regardless of the actual health of an instance, the LoadBalancer will assume a newly registered instance is healthy and put it into the InService state. If the instance is unhealthy, it will be transitioned to the OutOfService state on the first health check.
6 You cannot charge customers for their use of Elastic Load Balancing for instances running an Amazon EC2 paid AMI. At this time, you cannot use Elastic Load Balancing with instances running Amazon EC2 paid AMIs.
7 SOAP requests over HTTP will result in the following error: Premature end of file. AWSRequestId:No request id received. API requests using SOAP are only supported over HTTPS.
8 The LoadBalancer does not report zeros for the RequestCount metric in Amazon CloudWatch when there are no requests. You will get no datapoints for the RequestCount metric for the period when there are no requests. You cannot set Auto Scaling triggers that rely on zero RequestCount.
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