In a replication setup, a master MySQL server updates one or more slaves. Transactions are committed sequentially, and a slow transaction can cause the slave to lag behind the master. This means that if the master fails, it is possible that the slave might not have recorded the last few transactions.

Replication is a larger process for larger orders (typically 500 and up) where CD's are generally screen printed and replicated off a glass master. Duplication is a simpler operation where CD's are printed in printers and tracks are duplicated from a regular CD.

Replication is a detailed process that involves creating a glass plate which is used as a stamp to press discs. Duplication is a much less involved process using CD-R and DVD-R recordable discs. Read more about how CDs work and the technical difference between the two processes in how CDs are created.

A SRB file can be backedup or replicated in any number of resources. This improves data reliability and data access times. A backup-file is similar to any other replica of SRB file. The only difference comes from the operation used to create this replica. During Backup of a SRB file on a given resource, the system checks if the target resource already has the latest copy of the file (uses the MCAT system metadata about the file). If the resource has the latest copy, no movement of data is made.

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