Cloud services building ideology: reliability levels gradation

• Define the business requirements
• Form the technical requirements
• Independent safety factors

Development of systems for high availability and fault tolerance: when and where you want to duplicate the architecture

• A simple solution
• Robust solution
• Distributed fault-tolerant solution

Monitoring, balancing and scaling services located in the clouds

• Automatic Scaling
• Web-automatic scaling
• The specific Web Node
• System failures’ scenarios

Architecture of high reliability

• The upgrade process
• The resulting architecture Bitrix24
• Reliability