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Why Synchronization or Replication?
Working Offline
Perhaps the biggest reason for synchronization and
replication is to accord users the ability to work off-line in a
disconnected model. Now, mobile users are able to download the data
they need before they travel, can edit that data and then
synchronize upon their return.
Data Availability
One of the key benefits of a data replication system is
that data is made available locally, rather than through
potentially expensive, less reliable, and slow connections to a
single central database. Data is accessible locally even in the
absence of any connection to a central server, so that you are not
cut off from data in the event of a failure of a long-distance
network connection.
Response time
Replication improves response times for data requests
for two reasons. Retrieval rates are faster because requests are
processed on a local server, without accessing a wide area network.
Also, local processing offloads work from a central database server
so that competition for processor time is decreased.
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