> ## Documentation Index
> The index for all IBM Cloud docs is at: https://cloud.ibm.com/docs/llms.txt
> Use these files to discover more information as needed.

# Web App Multi-Zone Resiliency

The web app multi-zone resiliency pattern deploys a 3-tier web application on VPC Virtual Servers using compute, storage, and network cloud resources as well as other Cloud Services provisioned in multiple availability zones within a single region to meet high availability requirements.

## Reference

- [References](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-references&format=markdown)

## Reference architectures

- [Web app multi-zone resiliency](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-web-app-multi-zone&format=markdown)

## Deploying

- [Deploying a VPC VSI single region architecture](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-vpc-vsi-multizone-da&format=markdown)

## Overview

- [Overview](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-overview&format=markdown)

## Planning

- Design considerations
   - [Compute](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-compute-design&format=markdown)
   - [Storage](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-storage-design&format=markdown)
   - [Networking](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-networking-design&format=markdown)
   - [Security](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-security-design&format=markdown)
   - [Resiliency](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-resiliency-design&format=markdown)
   - [Service management](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-service-management-design&format=markdown)
- Architecture decisions
   - [Compute](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-compute-architecture&format=markdown)
   - [Storage](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-storage-architecture&format=markdown)
   - [Networking](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-networking-architecture&format=markdown)
   - [Security](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-security-architecture&format=markdown)
   - [Resiliency](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-resiliency-architecture&format=markdown)
   - [Service management](https://cloud.ibm.com/docs/pattern-vpc-vsi-multizone-resiliency?topic=pattern-vpc-vsi-multizone-resiliency-service&format=markdown)