Over the past year, we introduced you to the ContinuousSiteSwitchingprogram which entailssiteswitchingeach instance approximately once every six months. We would like to notify you about the latest additions to the ContinuousSiteSwitchingprogram schedule, since you have been identified as an admin for a Salesforce production or sandbox org that may be impacted.
Each Salesforce instance is built and maintained in two geographically separate locations. An instance is actively served from one location (the activesite) with transactions replicating in near real-time to the other completely redundant location (the readysite). During asiteswitch, we swap the locations of your ready and activesites; the readysitebecomes the new activesiteand vice versa.
If you already follow ourinfrastructure best practicesby not restricting access toSalesforce IP rangesand setting your DNS timeout value to 5 minutes (default setting), asiteswitchshould be seamless to your users following the declared maintenance window. For more information onsiteswitchingand actions you may need to take to prepare, review ourSiteSwitchingOverviewarticle.
This program allows us to continue to provide you with high availability of our services as we improve oursiteswitchingoperational processes through iteration. Our goal is to reduce the time it takes tositeswitchso that we may leverage the activity more seamlessly during unforeseen incidents and for long-running maintenances. In addition, many of our customers have an internal compliance requirement that their instances are capable of being served from either geographic locations throughout the year. Continuoussiteswitchingsatisfies that requirement. For more information, review ourContinuousSiteSwitchingarticle.
Trusthas been updated with the plannedsiteswitchesbeginning March 2, 2019 through July 2019, and will continue to be updated assiteswitchesare scheduled for the rest of 2019.