You are using an m1.small EC2 Instance with one 300 GB EBS volume to host a relational database. You
determined that write throughput to the database needs to be increased. Which of the following approaches
can help achieve this? Choose 2 answers
A.
Use an array of EBS volumes.
B.
Enable Multi-AZ mode.
C.
Place the instance in an Auto Scaling Groups
D.
Add an EBS volume and place into RAID 5.
E.
Increase the size of the EC2 Instance.
F.
Put the database behind an Elastic Load Balancer.
C and E
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D & E
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this one is tough for me.
Doubt about D because:
RAID 5 and RAID 6 are not recommended for Amazon EBS because the parity write operations of these RAID modes consume some of the IOPS available to your volumes
Source: http://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/raid-config.html
m1.small EC2 Instance running SW based RAID with parity write ops…
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A is correct (we can use array of EBS volumes for RAID 0 that improves performance)
E is correct (the instance size influence IO operations performance. m1.small that is used is obviously can be increased)
C is wrong (You can not scale relational databases simply by creating more instances, you need to perform more advanced DB replication and master/slave configuration as well to scale DB)
D is wrong (JM is right, Amazon strongly doesn’t recommend RAID 5 and RAID 6)
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ae
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A E
These are the only valid options.
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it should be A & E
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A and E is correct, you can opt for RAID -0 for performance and change of instance type will give youth high write throughput.
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A and E is correct
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A: we can use array of EBS volumes for RAID 0 that improves performance
E: the instance size influence IO operations performance. m1.small that is used is obviously can be increased
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ae
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A and E are correct
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Agree with T (A, E is right answer)
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BF
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A E
Who is responsible for the “show answer” button results? They’re about 90% wrong.
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A,E
https://aws.amazon.com/ec2/previous-generation/
Upgrade Paths (M1 to M3)
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A and E are the right answers.
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A E
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A & E are the right answers
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AE
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A & E
1. use EBS-optimized instance
2. use RAID-0 (array of volume)
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSPerformance.html
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/raid-config.html
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A & E,
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A & E are right answers
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A & E
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