Your company has HQ in Tokyo and branch offices all over the world and is using a logistics
software with a multi-regional deployment on AWS in Japan, Europe and US.
The logistic software has a 3-tier architecture and currently uses MySQL 5.6 for data persistence.
Each region has deployed its own database.
In the HQ region you run an hourly batch process reading data from every region to compute
cross- regional reports that are sent by email to all offices.
This batch process must be completed as fast as possible to quickly optimize logistics.
How do you build the database architecture in order to meet the requirements?

You have been asked to design the storage layer for an application. The application requires disk
performance of at least 100,000 IOPS. In addition, the storage layer must be able to survive the
loss of an individual disk, EC2 instance, or Availability Zone without any data loss.
The volume you provide must have a capacity of at least 3 TB.
Which of the following designs will meet these objectives?

Your company plans to host a large donation website on Amazon Web Services (AWS).
You anticipate a large and undetermined amount of traffic that will create many database writes.
To be certain that you do not drop any writes to a database hosted on AWS, which service should
you use?

A customer has a 10 GB AWS Direct Connect connection to an AWS region where they have a
web application hosted on Amazon Elastic Computer Cloud (EC2). The application has
dependencies on an on-premises mainframe database that uses a BASE (Baste Available, Soft
state, Eventual consistency) rather than an ACID (Atomicity, Consistency, Isolation, Durability)
consistency model. The application is exhibiting undesirable behavior because the database is
not able to handle the volume of writes. How can you reduce the load on your on-premises
database resources in the most cost-effective way?

You have launched an EC2 instance with four (4) 500 GB EBS Provisioned IOPS volumes
attached. The EC2 instance is EBS-Optimized and supports 500 Mbps throughput between EC2
and EBS. The four EBS volumes are configured as a single RAID 0 device, and each Provisioned
IOPS volume is provisioned with 4,000 IOPS (4,000 16KB reads or writes), for a total of 16,000
random IOPS on the instance. The EC2 instance initially delivers the expected 16,000 IOPS
random read and write performance. Sometime later, in order to increase the total random I/O
performance of the instance, you add an additional two 500 GB EBS Provisioned IOPS volumes
to the RAID. Each volume is provisioned to 4,000 IOPs like the original four, for a total of 24,000
IOPS on the EC2 instance. Monitoring shows that the EC2 instance CPU utilization increased
from 50% to 70%, but the total random IOPS measured at the instance level does not increase at
all.
What is the problem and a valid solution?

Your customer wishes to deploy an enterprise application to AWS, which will consist of several
web servers, several application servers, and a small (50GB) Oracle database. Information is
stored both in the database and the filesystems of the various servers. The backup system must
support database recovery, whole server and whole disk restores, and individual file restores with
a recovery time of no more than two hours.
They have chosen to use RDS Oracle as the database.
Which backup architecture will meet these requirements?