For migrating an existing SAP environment from VMware to Azure, a two-pronged approach is required for accurate resource sizing. Azure Migrate is the primary Microsoft tool designed to discover and assess on-premises environments, including VMware vCenter. It analyzes the performance metrics of the existing virtual machines (CPU, memory, disk I/O) to provide right-sized Azure VM recommendations. To complement this infrastructure data, SAP EarlyWatch Alert (EWA) reports from the source SAP system provide crucial application-specific performance metrics, such as SAPS (SAP Application Performance Standard) consumption, memory usage, and database growth. Combining the infrastructure assessment from Azure Migrate with the application performance data from EWA reports ensures a comprehensive and accurate sizing for the SAP workload in Azure.

B. Azure Site Recovery and SAP Quick Sizer: Azure Site Recovery is primarily a disaster recovery tool, not the recommended assessment tool for migrations. SAP Quick Sizer is used for sizing new (greenfield) SAP implementations, not for analyzing existing systems.

C. SAP Quick Sizer and SAP HANA system replication: SAP Quick Sizer is for new implementations. SAP HANA system replication is a high-availability/disaster-recovery technology for databases, not a sizing or assessment tool.

D. Azure Site Recovery Deployment Planner and SAP HANA Cockpit: The ASR Deployment Planner is for DR planning. While SAP HANA Cockpit provides monitoring, EWA reports are the standard SAP tool for comprehensive performance analysis and sizing reports.

1. Microsoft Docs

Azure Well-Architected Framework

SAP workload on Azure: planning and deployment checklist. This document explicitly states the tools for different scenarios.

Under the "Sizing" section

it recommends: "For existing systems

SAP EarlyWatch reports are very helpful. They help you determine the resources that you use."

It also states: "For new implementations

use the SAP Quick Sizer." This confirms Quick Sizer is for new

not existing

systems.

Reference: https://learn.microsoft.com/en-us/azure/architecture/framework/sap/sap-planning-checklist#sizing

2. Microsoft Docs

About Azure Migrate. This document establishes Azure Migrate as the central hub for migration projects.

"The Azure Migrate: Discovery and assessment tool discovers on-premises VMware VMs... The tool then assesses the discovered servers to check whether they're suitable for migration to Azure

and provides cost estimations."

Reference: https://learn.microsoft.com/en-us/azure/migrate/migrate-services-overview#azure-migrate-discovery-and-assessment-tool

3. Microsoft Docs

Select a VMware assessment tool. This page guides users on choosing the right tool for VMware assessment.

"To assess on-premises VMware VMs for migration to Azure

we recommend you use the Azure Migrate: Discovery and assessment tool."

Reference: https://learn.microsoft.com/en-us/azure/migrate/common-questions-discovery-assessment#what-assessment-tools-can-i-use