When configuring replication for a file server to a disaster recovery site, a system administrator needs to prevent a scenario where a user's write operation to a file occurs at the same time the replication process is reading that same file. This situation could result in a corrupt, unusable file at the DR site. Which of the following mechanisms is specifically designed to prevent this issue?
The correct answer is file locking. File locking is a mechanism that prevents simultaneous access to a file, ensuring data integrity. In the context of replication, it temporarily blocks write operations to a file while it is being read for copying to the disaster recovery site. This guarantees that the replicated copy is a consistent, point-in-time version of the file, preventing corruption.
Asynchronous replication is a method where data is copied to the DR site after the primary write has been acknowledged; it describes the timing of replication, not the integrity protection mechanism for the file itself.
Bidirectional replication describes a data synchronization model where data can flow in both directions between two sites, which is not relevant to protecting a file during a single copy operation.
Mirroring is a general term for creating an exact copy of data, often associated with RAID 1, but it does not describe the specific file-level control needed to prevent in-flight modification during replication.
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How does file locking work to prevent data corruption?
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What is the difference between file locking and asynchronous replication?
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Can bidirectional replication or mirroring replace file locking for preventing file corruption?
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Why is file locking important during replication?
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How does asynchronous replication differ from file locking?
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Can mirroring ensure data integrity during replication?
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How does file locking ensure data integrity during replication?
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What is the difference between file locking and asynchronous replication?
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In what scenarios would file locking not be sufficient to prevent data loss or corruption?