How SIOS DataKeeper Works

At the highest level, DataKeeper provides the ability to mirror a volume on one system (source) to a different volume on another system (target) across any network. When the mirror is created, all data on the source volume is initially replicated to the target volume, overwriting it. When this initial synchronization (also referred to as a full resync of the data) of the volumes is complete, the target volume is an exact replica of the source volume in terms of size and data content. Once the mirror is established, DataKeeper intercepts all writes to the source volume and replicates that data across the network to the target volume.

Replication is performed at the block level in one of two ways:

In most cases, asynchronous mirroring is recommended on WANs and synchronous mirroring is recommended on LANs.


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