This may sound like a small thing, but it is a big deal: as of April 2013 Microsoft supports Streched Farm setups with SharePoint 2013.
In a Streched Farm setup the servers of one farm are distributed among two or more data centers. This is done to provide high availability, i.e., to cover situations where one data center is down because of electricity outage, water in the data center, earthquake or similar situations – or simply in case of someone breaking into a data center and physically destroying equipment.
The original release of SharePoint 2013 did not support Streched Farms. Microsoft now published updated information. There are however some conditions:
SharePoint Server 2013 supports stretched farm architectures in which servers are located in different datacenters. For a stretched farm to work, there must be less than 1 millisecond latency between the computer running SQL Server and the front-end web servers in one direction, and at least 1 gigabit per second bandwidth.
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