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Guru's Guide to SQL Server Architecture and Internals, The by Ken Henderson

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Conflict Resolution

Merge replication provides an elaborate and extensible conflict resolution system. To begin with, you can specify what actually constitutes a conflict—a change made to the same article row by two different parties in the merge replication scenario, or a change made to the same article column in the same row by two different parties. If you employ column-based conflict detection, two parties in the replication scenario can change different columns in the same row without causing a conflict. If you employ row-based conflict detection, changes made by two different parties to the same row cause a conflict that must be resolved.

Merge replication detects conflicts by inspecting rowguidcol values, generations, lineage values, and, ...

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