A customer needs to implement a Highly Available solution for JMS that has a primary data center and a backup. Which three steps would you perform when designing your solution?

Question

Exhibit

Options

• AStore Transaction Logs in a database and use Database stores for JMS to make replication
• BUse file based Transaction Logs and JMS stores and implement a separate replication solution
• CImplement Oracle RAC at each site to provide a highly available solution within each datacenter.
• DConfigure Whole Server Migration to migrate WebLogic Managed Servers from the primary to the
• EConfigure Automatic Service Migration for JMS high availability within a datacenter.

• A
  63% (22)
• B
  11% (4)
• D
  26% (9)

Explanation

For a two-datacenter JMS HA architecture, you need three layers working together: A uses database-backed JMS stores and transaction logs, which enables native database replication (e.g., Oracle Data Guard) to synchronize message data between the primary and backup sites - file-based stores lack this built-in replication capability. C deploys Oracle RAC at each site, ensuring no single database node failure can bring down JMS persistence within a datacenter. E configures Automatic Service Migration (ASM), which detects JMS service failures and automatically re-hosts those services on a healthy managed server within the same cluster, providing fine-grained service-level recovery.

B is wrong because file-based stores require you to bolt on a separate, error-prone replication tool - the database approach in A handles this natively and more reliably. D is wrong because Whole Server Migration is a coarser, single-datacenter mechanism that migrates an entire server instance (not just JMS services) and is not designed for cross-datacenter failover; ASM in option E is the preferred, JMS-specific approach.

Memory tip: Think of the three layers as "Store → Survive → Shift" - Store data in a DB (A) so it can replicate across sites, Survive node failures with RAC (C), and Shift JMS services automatically on failure with ASM (E).

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