What is SQL Server Always on Technologies?
SQL Server Always on Technologies support mission critical applications with the
highest level of availability, because any application downtime can impact your
business, resulting in loss of revenue, increases in customer dissatisfaction,
and damage to your company's credibility.
Today, SQL
Server 2005 Always on Technologies include database mirroring, failover
clustering, database snapshots, snapshot isolation, peer-to-peer replication,
log shipping, and online operations. Use separately or in combination, these
features will help you minimize downtime keeping critical enterprise systems
available.
For more details, you can go here : https://www.microsoft.com/sql/alwayson
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