Many factors can cause site-wide failures, including an air conditioning failure or leaking roof, a power failure, or a major hurricane. Site disruptions can last anywhere from a few hours to days or even weeks. There are two methods for replicating data across sites. One method is to tightly couple redundant servers across high speed/low latency links, to provide zero data-loss and zero downtime. The other method is to loosely couple redundant servers over medium speed/higher latency/greater distance lines. This provides a disaster recovery capability where a remote server can be restarted with a copy of the application database missing only the last few updates. In the latter case, asynchronous data replication maintains a backup copy of the database.
Here are the top 10 strategic technology trends that will impact most organizations in 2017. Strategic technology trends are defined as those with substantial disruptive potential or those reaching the tipping point over the next five years. ... More >>