A user has configured an Auto Scaling group with ELB. The user has enabled detailed CloudWatch monitoring
on Elastic Load balancing. Which of the below mentioned statements will help the user understand this
functionality better?
A.
ELB sends data to CloudWatch every minute only and does not charge the user
B.
ELB will send data every minute and will charge the user extra
C.
ELB is not supported by CloudWatch
D.
It is not possible to setup detailed monitoring for ELB
Explanation:
CloudWatch is used to monitor AWS as well as the custom services. It provides either basic or detailed
monitoring for the supported AWS products. In basic monitoring, a service sends data points to CloudWatch
every five minutes, while in detailed monitoring a service sends data points to CloudWatch every minute.
Elastic Load Balancing includes 10 metrics and 2 dimensions, and sends data to CloudWatch every minute. This
does not cost extra.
Answer – D
http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/supported_services.html
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I believe the answer is B
Elastic Load Balancing
Elastic Load Balancing sends data to CloudWatch every minute. You can create alarms using Elastic Load Balancing Dimensions and Metrics. For more information, see Monitor Your Load Balancer Using Amazon CloudWatch in the Elastic Load Balancing Developer Guide.
The same link in the above comment.
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A is correct. Refer the followig in http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/elb-metricscollected.html:
“CloudWatch provides detailed monitoring of Elastic Load Balancing by default. Unlike Amazon EC2, you do not need to specifically enable detailed monitoring. “
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Where in the above inside quotation do you read “does not charge the user”? A is incorrect
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D should be correct.
Its already 60 seconds (detailed) by default and you cannot turn this on or off.
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Hey Folks , don get confused with this ques , actually u can’t enable detailed cloudwatch monitoring on ELB and by default it is set to 60secs and no one can change it….SO the CORRECT ANSWER is D
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Hi Karthik. 60 secs = detailed monitoring. regular monitor is 5 minutes.
AWS documentation says:
“CloudWatch provides detailed monitoring of Elastic Load Balancing by default. Unlike Amazon EC2, you do not need to specifically enable detailed monitoring.”
http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/elb-metricscollected.html
Answer is A
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ELB default is 1 minute. Default cloud watch metrics are available for free and granular metrics would incur extra cost. Given ELB metrics are already 1 minute by default there is no way you can enable detailed monitoring on them.
D should be the answer.
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B
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a
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The answer should be A.
– Elastic Load Balancing sends data to CloudWatch every minute.
– Auto Scaling sends data to CloudWatch every 5 minutes by default.
For an additional charge, you can enable detailed monitoring for Auto Scaling, which sends data to CloudWatch every minute.
– Amazon EC2 sends data to CloudWatch every 5 minutes by default. For an additional charge, you can enable detailed monitoring for Amazon EC2, which sends data to CloudWatch every minute.
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Elastic Load Balancing reports metrics to CloudWatch only when requests are flowing through the load balancer. If there are requests flowing through the load balancer, Elastic Load Balancing measures and sends its metrics in 60-second intervals. If there are no requests flowing through the load balancer or no data for a metric, the metric is not reported.
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Answer is B.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-cloudwatch-new.html
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a
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A
ELB can send data to cloud watch every minute without extra cost
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A
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A
https://aws.amazon.com/cloudwatch/details/#other-aws-resource-monitoring
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Answer is B, in the article you posted I found this quote:
“Detailed Monitoring for Amazon EC2 instances: All metrics available to Basic Monitoring at one-minute frequency, for an additional charge. Instances with Detailed Monitoring enabled allows data aggregation by Amazon EC2 AMI ID and instance type.”
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None of the links indicated have mentioned anything about ELB detailed monitoring, and also nothing about it being free.
Guys- check your links, don’t spread rumors
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the Answer is A:
“Auto Scaling groups: seven pre-selected metrics at one-minute frequency, optional and for no additional charge.
Elastic Load Balancers: thirteen pre-selected metrics at one-minute frequency, for no additional charge.
Amazon Route 53 health checks: One pre-selected metric at one-minute frequency, for no additional charge.”
https://aws.amazon.com/cloudwatch/details/#other-aws-resource-monitoring
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