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Difficulty: MediumAssess and Select Migration Strategy (7 Rs)

A media company is planning to migrate its video production and archiving platform to AWS. The platform consists of three main components:

1. A proprietary video transcoding engine compiled as a legacy C++ binary. It runs on a specialized Linux kernel configuration with custom hardware optimizations. The source code is unavailable, and the engine cannot be modified or containerized.
2. A metadata store currently running on an on-premises Oracle database. The database uses complex, custom PL/SQL stored procedures. The company wants to modernize this store to Amazon Aurora PostgreSQL to reduce licensing costs, which will require schema rewrite and query modifications using the AWS Schema Conversion Tool (SCT).
3. A legacy media archiving library stored on physical LTO tape drives. The tapes contain historical footage that is rarely accessed but must be kept for regulatory compliance. The company has decided not to migrate this tape library to AWS during the initial phase and will keep it in the on-premises datacenter.

Which combination of migration strategies represents the most appropriate 7 Rs pathways for these components?

  1. A
    Transcoding engine: Replatform; Metadata store: Replatform; Legacy archive: Retain
  2. B
    Transcoding engine: Rehost; Metadata store: Replatform; Legacy archive: Retire
  3. Transcoding engine: Rehost; Metadata store: Refactor; Legacy archive: RetainAnswer
  4. D
    Transcoding engine: Refactor; Metadata store: Rehost; Legacy archive: Retire

Answer

Transcoding engine: Rehost; Metadata store: Refactor; Legacy archive: Retain
The correct option is the strategy mapping 'Transcoding engine: Rehost; Metadata store: Refactor; Legacy archive: Retain'. The transcoding engine cannot be modified or containerized, and needs custom kernel optimizations, which fits a Rehost migration onto EC2. The metadata store requires converting an on-premises Oracle database to Amazon Aurora PostgreSQL, involving PL/SQL code rewrites and schema changes; this constitutes Refactoring. The legacy LTO tape library is not being migrated but must be preserved for compliance, which represents Retain.

Step-by-Step Solution

1
Analyze the constraints of the video transcoding engine.
The transcoding engine requires Rehost.
Since the source code is unavailable and it requires specialized kernel settings, it cannot be refactored or replatformed, making Rehost (lift-and-shift to EC2) the only viable option.
2
Evaluate the migration requirements of the database metadata store.
The metadata store requires Refactor.
Migrating from Oracle to Amazon Aurora PostgreSQL involves schema conversion, PL/SQL rewrites, and application modifications, which constitutes Refactoring (re-architecting) rather than a simple Replatform.
3
Determine the migration pathway for the legacy media archiving library.
The legacy media archiving library requires Retain.
Because the archive contains data required for regulatory compliance but will not be moved to the cloud in the current phase, it must be kept on-premises (Retain) rather than being deleted (Retire).

Key Concept

The 7 Rs migration strategy framework differentiates between Rehost (lift-and-shift), Replatform (lift-tinker-and-shift), Refactor (re-architect), and Retain based on workload constraints and modernization goals.
Estimated Time:1m 30s
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Assess and Select Migration Strategy (7 Rs)

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