Which AWS storage and database architecture meets the r…

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A 3-tier e-commerce web application is current deployed on-premises and will be migrated to
AWS for greater scalability and elasticity The web server currently shares read-only data
using a network distributed file system The app server tier uses a clustering mechanism for
discovery and shared session state that depends on IP multicast The database tier uses
shared-storage clustering to provide database fall over capability, and uses several read
slaves for scaling Data on all servers and the distributed file system directory is backed up
weekly to off-site tapes
Which AWS storage and database architecture meets the requirements of the application?

A.
Web servers, store read-only data in S3, and copy from S3 to root volume at boot time App
servers snare state using a combination or DynamoDB and IP unicast Database use RDS with
multi-AZ deployment and one or more Read Replicas Backup web and app servers backed up
weekly via Mils database backed up via DB snapshots.

B.
Web servers store -read-only data in S3, and copy from S3 to root volume at boot time App
servers share state using a combination of DynamoDB and IP unicast Database, use RDS with
multi-AZ deployment and one or more read replicas Backup web servers app servers, and
database backed up weekly to Glacier using snapshots.

C.
Web servers store read-only data In S3 and copy from S3 to root volume at boot time App servers
share state using a combination of DynamoDB and IP unicast Database use RDS with multi-AZ
deployment Backup web and app servers backed up weekly via AM is. Database backed up via
DB snapshots

D.
Web servers, store read-only data in an EC2 NFS server, mount to each web server at boot time
App servers share state using a combination of DynamoDB and IP multicast Database use RDS
with multi-AZ deployment and one or more Read Replicas Backup web and app servers backed
up weekly via Mils database backed up via DB snapshots

Explanation:
https://d0.awsstatic.com/whitepapers/Storage/AWS%20Storage%20Services%20Whitepaperv9.pdf
Amazon Glacier doesn’t suit all storage situations. Listed following are a few
storage needs for which you should consider other AWS storage options instead
of Amazon Glacier.
Data that must be updated very frequently might be better served by a storage solution with
lower read/write latencies, such as Amazon EBS, Amazon RDS, Amazon DynamoDB, or
relational databases running on EC2.

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