标签: DirectConnect, Snowball
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cloudos参与者
A com pany operates a group of imaging satellites. The satellites stream data to one of the company’s ground stations where processing creates about 5 GB of images per minute. This data is added to network-attached storage, where 2 PB of data are already stored.
The company runs a website that allows its customers to access and purchase the images over the Internet. This website is also running in the ground station. Usage analysis shows that customers are most likely to access images that have been captured in the last 24 hours. The company would like to migrate the image storage and distribution system to AWS to reduce costs and increase the number of customers that can be served.
Which AWS architecture and migration strategy will meet these requirements?
A. Use multiple AWS Snowball appliances to migrate the existing imagery to Amazon S3. Create a 1-Gb AWS Direct Connect connection from the ground station to AWS, and upload new data to Amazon S3 through the Direct Connect connection. Migrate the data distribution website to Amazon EC2 instances. By using Amazon S3 as an origin, have this website serve the data through Amazon CloudFront by creating signed URLs.
B. Create a 1-Gb Direct Connect connection from the ground station to AWS. Use the AWS
Command Line Interface to copy the existing data and upload new data to Amazon S3 over the Direct Connect connection. Migrate the data distribution website to EC2 instances. By using Amazon S3 as an origin, have this website serve the data through CloudFront by creating signed URLs.
C. Use multiple Snowball appliances to migrate the existing images to Amazon S3. Upload new data by regularly using Snowball appliances to upload data from the network-attached storage. Migrate the data distribution website to EC2 instances. By using Amazon S3 as an origin, have this website serve the data through CloudFront by creating signed URLs.
D. Use multiple Snowball appliances to migrate the existing images to an Amazon EFS file system. Create a 1-Gb Direct Connect connection from the ground station to AWS, and upload new data by mounting the EFS file system over the Direct Connect connection. Migrate the data distribution website to EC2 instances. By using webservers in EC2 that mount the EFS file system as the origin, have this website serve the data through CloudFront by creating signed URLs.答案为B,感觉不对
2PB的数据,而且每分钟就增加多5G数据,B中1G的DC 2PB大概好像得传204我算的没错的话,而且还有增加的数据
题目中有提到 根据分析,用户常访问过去24小时内捕获的图片,虽然说之前的图片数据不经常访问,但是只用1G的DC得传200天,一般都不这么干吧,而且每天还新增这么多
利用 Snowball,可以在您的本地数据中心与 Amazon Simple Storage Service (Amazon S3) 之间传输数百 TB 或 PB 的数据,所以如果是数百TB或PB AWS官方解决方案是Snowball,所以我觉得A合适一些 -
挨踢小茶管理员
我也同意是A,因为每分钟5GB的数据,平均来说也要利用0.67Gbps的带宽。剩下的0.33带宽来传本来有的2PB数据那真是传到猴年马月了。
Snowball传这个数据比较现实。
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ciscogeek参与者
选A
这题明年卫星地面站都可以不要了,也上aws
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