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DevOps for Serverless Applications by Shashikant Bangera

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High availability

When we go into production, high availability becomes essential, and with respect to serverless applications, high availability depends on the number of zones in which the lambda functions can be executed. If our function uses the default network, then it is automatically able to execute within all available zones in that region. Nothing else is required to configure the high availability for the function in the default network environment. Therefore, while designing the VPC, it is important to include the subnets from multiple availability zones. 

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