This includes a data protection application like backup service, replication service or reporting applications, which can rely on read-only data repository. Some snapshots are made instantly and the content of them is immediately available for applications that require read-only data. Snapshots can capture state of data at a particular point-in-time. Data can be replicated locally within the system or via local area network (LAN) or wide area network (WAN). The whole replication process can use different methods of transferring data from the source (primary storage system) to the destination (secondary storage system). In practice, if the primary storage is damaged or completely destroyed, with no ability to restore its content, data can be transferred from the secondary storage (replica) once the primary unit is replaced or repaired. Because data is copied with latency, primary storage failure can cause data loss if most recent modifications were not transferred to the secondary storage.įile replication can be used to restore the content of production storage unit after failure. File level replication is asynchronous, so files are first written to the primary storage and then, based on a defined schedule/time interval changes, are collected and replicated to the secondary storage unit. Data replication is a service responsible for copying/duplicating files and folders from a primary storage (production) to a secondary storage (replica).
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