Question 1
A financial services company is implementing a three-data-center disaster recovery strategy using HPE 3PAR StoreServ arrays. The primary site is in New York, the secondary synchronous site is in New Jersey (30km away), and the tertiary asynchronous periodic site is in Chicago (1200km away). The architect needs to ensure that a single failure event (e.g., New York site outage) results in an automatic, transparent failover to New Jersey for their mission-critical Oracle database. Which HPE 3PAR software license and configuration is essential to meet this specific requirement?
Answer and explanation
Correct answer: C
HPE Peer Persistence is the required technology for automatic and transparent failover between two sites. A critical component for automatic failover is a Quorum Witness, which acts as a tie-breaker to prevent split-brain scenarios. Best practice dictates that the Quorum Witness must reside at a third site, independent of the two primary data centers, to ensure it remains available if either of the primary sites or the link between them fails. Placing the witness at the tertiary site (Chicago) is not recommended as a regional disaster could impact both the primary and witness sites if they were geographically close, and in this specific 3DC model, the witness should be fully independent.