Disaster
RTO
SLAYearlyMonthly 99%3.65 days7.20 hours 99.5%1.83 days3.60 hours 99.9%8.76 hours43.8 minutes 99.95%4.38 hours21.56 minutes 99.99%53 minutes4.32 minutes %5.26 minutes25.9 seconds
$$$$$$$$$$ Few days Few hours 5-10 Minutes Few Minutes 99.9% 99.95% 99.99% %
$$$$$$$$$$ > Few Hours > 1 Hour > 5 Minutes No Downtime Cold DR (Most Common) Warm DR (Recommended) Hot DR (Least Common) Hot HA (Live/Live Config)
Client LB App Database … Data Center #1 File Storage Data Center #2 File Storage
Client LB SQL Database … Region #1 Blob Storage On-Premises File Storage Cloud Services App Fault Domain #N Fault Domain #1
Client LB SQL Database … Region #1 Blob Storage On-Premises File Storage Cloud Services App Fault Domain #N Fault Domain #1 Database App SB Queue
Client LB App Master … Data Center #1 C LB App … Data Center #2 Slave Replication File Storage Replication LB App Master … Data Center #2 File Storage C LB App … Data Center #1 Slave File Storage Replication
LB SQL Database Region #2 Blob Storage Fault Domain #1 App Fault Domain #2 App LB SQL Database … Region #2 Blob Storage Fault Domain #1 App Fault Domain #2 App Client LB SQL Database … Region #1 Blob Storage Fault Domain #1 App Fault Domain #2 App Replication
LB App … Data Center #1 File Storage LB App … Data Center #2 File Storage Client Merge Replication
LB … SQL Database Data Center #2 Blob Storage Fault Domain #1 App Fault Domain #2 App LB SQL Database … Region #2 Blob Storage Fault Domain #1 App Fault Domain #2 App Client LB SQL Database … Region #1 Blob Storage Fault Domain #1 App Fault Domain #2 App Replication
LB … SQL Database Region #2 Blob Storage Fault Domain #1 App Fault Domain #2 App LB SQL Database … Region #2 Blob Storage Fault Domain #1 App Fault Domain #2 App Client LB SQL Database … Region #1 Blob Storage Fault Domain #1 App Fault Domain #2 App Replication SB Queue
LB … SQL Database Region #2 Blob Storage Fault Domain #1 App Fault Domain #2 App Backup LB SQL Database … Region #2 Blob Storage Fault Domain #1 App Fault Domain #2 App Client LB SQL Database … Region #1 Blob Storage Fault Domain #1 App Fault Domain #2 App Replication
LB App … Data Center #1 File Storage LB App … Data Center #2 File Storage Your Site Merge Replication
LB SQL Server on VM … Region #2 Blob Storage Fault Domain #1 App Fault Domain #2 App Client LB SQL Server on VM … Region #1 Blob Storage Fault Domain #1 App Fault Domain #2 App Replication