A financial company uses a database that is crucial for their day-to-day operations. To ensure that the database remains highly available and its data is protected against localized disasters, they plan to replicate the data. Which replication strategy should they use to allow for near real-time data availability and minimize the risk of data loss, while ensuring that any corruption in the primary database does not immediately replicate to the secondary database?
Asynchronous replication is suitable for systems where high availability and disaster recovery are important, as it allows for almost real-time data replication without the downside of immediate corruption transfer that synchronous replication might suffer from. With asynchronous replication, there is a delay between the time changes are made to the primary site and when they are replicated to the secondary site. This delay can potentially allow for intervention before corrupt data is replicated. Synchronous replication, while providing immediate data consistency between sites, could potentially replicate corrupted data to the secondary site before the issue is detected. Snapshot and mirroring are data replication technologies, but they do not specifically address the concern of potential immediate corruption transfer to the secondary site due to their differing operational methodologies.
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What is the main difference between asynchronous and synchronous replication?
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What are snapshot replication and disk mirroring, and how do they differ from asynchronous replication?