You Are Running a Database on an EC2 Instance, with the Data

question 188

Multiple Choice

You are running a database on an EC2 instance, with the data stored on Elastic Block Store (EBS) for persistence. At times throughout the day, you are seeing large variance in the response times of the database queries Looking into the instance with the isolate command you see a lot of wait time on the disk volume that the database's data is stored on. What two ways can you improve the performance of the database's storage while maintaining the current persistence of the data? (Choose two.)

• A) Move to an SSD backed instance
• B) Move the database to an EBS-Optimized Instance
• C) T Use Provisioned IOPs EBS
• D) Use the ephemeral storage on an m2 4xiarge Instance Instead

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Definitions:

Therblig

A basic motion element used in motion study to analyze the physical movements needed to perform a manual operation or task.

Labour Standard

A set benchmark or norm regarding the amount of labor time required to perform a specific task.

Confidence Level

A statistical measure expressed as a percentage that represents how often the true population parameter would fall within a specified range in repeated sampling.

Standard Deviation

A statistic that measures the dispersion or variability of a dataset relative to its mean, used to indicate the degree of variation.