SAA-C03 · Question #45
A company is using AWS DataSync to migrate millions of files from an on-premises system to AWS. The files are 10 KB in size on average. The company wants to use Amazon S3 for file storage. For the…
The correct answer is A. Use an archive tool lo group the files into large objects. Use DataSync to migrate the objects. The goal is to cost-effectively migrate millions of small files to S3, with infrequent access for the first year and then long-term archiving, minimizing costs associated with S3 PUT requests for small objects.
Question
A company is using AWS DataSync to migrate millions of files from an on-premises system to AWS. The files are 10 KB in size on average. The company wants to use Amazon S3 for file storage. For the first year after the migration the files will be accessed once or twice and must be immediately available. After 1 year the files must be archived for at least 7 years. Which solution will meet these requirements MOST cost-effectively?
Options
- AUse an archive tool lo group the files into large objects. Use DataSync to migrate the objects.
- BUse an archive tool to group the files into large objects. Use DataSync to copy the objects to S3
- CConfigure the destination storage class for the files as S3 Glacier Instant. Retrieval Use a lifecycle
- DConfigure a DataSync task to transfer the files to S3 Standard-Infrequent Access (S3 Standard-
How the community answered
(29 responses)- A55% (16)
- B14% (4)
- C24% (7)
- D7% (2)
Why each option
The goal is to cost-effectively migrate millions of small files to S3, with infrequent access for the first year and then long-term archiving, minimizing costs associated with S3 PUT requests for small objects.
Grouping millions of small files into larger objects before migrating with DataSync significantly reduces the number of individual S3 PUT requests, which are charged per request, thus lowering migration costs. After migration, S3 lifecycle policies can then transition these larger objects to S3 Standard-IA for infrequent access and subsequently to Glacier or Deep Archive for long-term, cost-effective storage.
This option is identical to A. If it implies simply copying to S3 without further cost optimization for access tiers, it's incomplete, but the core idea of grouping is key for small files.
Concept tested: S3 cost optimization for small objects
Source: https://aws.amazon.com/s3/pricing/
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