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Copy file name to clipboardExpand all lines: articles/migrate/common-questions-appliance.md
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title: Azure Migrate appliance FAQ
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description: Get answers to common questions about the Azure Migrate appliance.
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ms.topic: conceptual
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ms.date: 02/17/2020
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ms.date: 03/09/2020
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---
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# Azure Migrate appliance: Common questions
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Here's more information about how data is stored:
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- The data is securely stored in a Microsoft subscription, and it's deleted when you delete the Azure Migrate project.
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- The collected data is securely stored in CosmosDB in a Microsoft subscription. The data is deleted when you delete the Azure Migrate project. Storage is handled by Azure Migrate. You can't specifically choose a storage account for collected data.
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- If you use [dependency visualization](concepts-dependency-visualization.md), the data that's collected is stored in the United States in an Azure Log Analytics workspace created in your Azure subscription. The data is deleted when you delete the Log Analytics workspace in your subscription.
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## How much data is uploaded during continuous profiling?
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3. The appliance collects configuration data about VMs (cores, memory, disks, NICs) and the performance history of each VM for the past month.
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4. The collected metadata is sent to the Azure Migrate: Server Assessment tool (over the internet via HTTPS) for assessment.
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## Can I connect the appliance to multiple instances of vCenter Server?
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## Can the Azure Migrate appliance connect to multiple vCenter Servers?
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No. There's a one-to-one mapping between an [Azure Migrate appliance](migrate-appliance.md) and vCenter Server. To discover VMs on multiple vCenter Server instances, you must deploy multiple appliances.
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## Can an Azure Migrate project have multiple appliances?
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A project can have multiple appliances attached to it. However, an appliance can only be associated with one project.
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No. There's a one-to-one mapping between an appliance and vCenter Server. To discover VMs on multiple vCenter Server instances, you must deploy multiple appliances.
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## How many VMs or servers can I discover with an appliance?
Copy file name to clipboardExpand all lines: articles/migrate/common-questions-server-migration.md
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## How does churn rate affect agentless replication?
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Because agentless replication folds in data, the *churn pattern* is more important than the *churn rate*. When a file is written again and again, the rate doesn’t have much impact. However, a pattern in which every other sector is written causes high churn in the next cycle. Because we minimize the amount of data we transfer, we allow the data to fold as much as possible before we schedule the next cycle.
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Because agentless replication folds in data, the *churn pattern* is more important than the *churn rate*. When a file is written again and again, the rate doesn't have much impact. However, a pattern in which every other sector is written causes high churn in the next cycle. Because we minimize the amount of data we transfer, we allow the data to fold as much as possible before we schedule the next cycle.
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## How frequently is a replication cycle scheduled?
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## How does agentless replication affect VMware servers?
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Agentless replication results in some performance impact on VMware vCenter Server and VMware ESXi hosts. Because agentless replication uses snapshots, it consumes IOPS on storage, so some IOPS storage bandwidth is required. We don’t recommend using agentless replication if you have constraints on storage or IOPs in your environment.
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Agentless replication results in some performance impact on VMware vCenter Server and VMware ESXi hosts. Because agentless replication uses snapshots, it consumes IOPS on storage, so some IOPS storage bandwidth is required. We don't recommend using agentless replication if you have constraints on storage or IOPs in your environment.
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## Can I do agentless migration of UEFI VMs to Azure Gen 2?
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## How many VMs can I replicate at one time by using agentless migration?
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Currently, you can migrate 100 VMs per instance of vCenter Server simultaneously. Migrate in batches of 10 VMs.
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## When do I migrate machines as physical servers?
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Migrating machines by treating them as physical servers is useful in a number of scenarios:
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- When you're migrating on-premises physical servers.
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- If you're migrating VMs virtualized by platforms such as Xen, KVM.
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- To migrate Hyper-V or VMware VMs, if for some reason you're unable to use the standard migration process for [Hyper-V](tutorial-migrate-hyper-v.md), or [VMware](server-migrate-overview.md) migration. For example if you're not running VMware vCenter, and are using ESXi hosts only.
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- To migrate VMs that are currently running in private clouds to Azure
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- If you want to migrate VMs running in public clouds such as Amazon Web Services (AWS) or Google Cloud Platform (GCP), to Azure.
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## Do I need VMware vCenter to migrate VMware VMs?
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To [migrate VMware VMs](server-migrate-overview.md) using VMware agent-based or agentless migration, ESXi hosts on which VMs are located must be managed by vCenter Server. If you don't have vCenter Server, you can migrate VMware VMs by migrating them as physical servers. [Learn more](migrate-support-matrix-physical-migration.md).
Copy file name to clipboardExpand all lines: articles/migrate/contoso-migration-overview.md
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title: Contoso migration series | Microsoft Docs
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description: Provides an overview of the migration strategy and scenarios used by Contoso to migrate their on-premises datacenter to Azure.
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author: rayne-wiselman
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manager: carmonm
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ms.service: azure-migrate
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ms.topic: conceptual
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ms.date: 09/22/2019
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ms.date: 03/09/2020
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ms.author: raynew
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--- | ---
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[Article 1: Overview](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-overview) | Overview of the article series, Contoso's migration strategy, and the sample apps that are used in the series.
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[Article 2: Deploy Azure infrastructure](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-infrastructure) | Contoso prepares its on-premises infrastructure and its Azure infrastructure for migration. The same infrastructure is used for all migration articles in the series.
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[Article 3: Assess on-premises resources for migration to Azure](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-assessment) | Contoso runs an assessment of its on-premises SmartHotel360 app running on VMware. Contoso assesses app VMs using the Azure Migrate service, and the app SQL Server database using Data Migration Assistant.
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[Article 3: Assess on-premises resources for migration to Azure](https://docs.microsoft.com/azure/cloud-adoption-framework/migrate/azure-migration-guide/assess?tabs=Tools) | Contoso runs an assessment of its on-premises SmartHotel360 app running on VMware. Contoso assesses app VMs using the Azure Migrate service, and the app SQL Server database using Data Migration Assistant.
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[Article 4: Rehost an app on an Azure VM and SQL Database Managed Instance](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-rehost-vm-sql-managed-instance) | Contoso runs a lift-and-shift migration to Azure for its on-premises SmartHotel360 app. Contoso migrates the app front-end VM using [Azure Site Recovery](https://docs.microsoft.com/azure/site-recovery/site-recovery-overview). Contoso migrates the app database to an Azure SQL Database Managed Instance using the [Azure Database Migration Service](https://docs.microsoft.com/azure/dms/dms-overview).
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[Article 5: Rehost an app on Azure VMs](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-rehost-vm) | Contoso migrates its SmartHotel360 app VMs to Azure VMs by using the Site Recovery service.
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[Article 6: Rehost an app on Azure VMs and in a SQL Server AlwaysOn availability group](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-rehost-vm-sql-ag) |Contoso migrates the SmartHotel360 app. Contoso uses Site Recovery to migrate the app VMs. It uses the Database Migration Service to migrate the app database to a SQL Server cluster that's protected by an AlwaysOn availability group.
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[Article 7: Rehost a Linux app on Azure VMs](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-rehost-linux-vm) | Contoso completes a lift-and-shift migration of its Linux osTicket app to Azure VMs, using the Site Recovery service.
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[Article 8: Rehost a Linux app on Azure VMs and Azure Database for MySQL](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-rehost-linux-vm-mysql) | Contoso migrates its Linux osTicket app to Azure VMs by using Site Recovery. It migrates the app database to Azure Database for MySQL by using MySQL Workbench.
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[Article 9: Refactor an app in an Azure web app and Azure SQL Database](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-refactor-web-app-sql) | Contoso migrates its SmartHotel360 app to an Azure web app and migrates the app database to an Azure SQL Server instance with the Database Migration Assistant.
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[Article 9: Refactor an app in an Azure web app and Azure SQL Database](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-refactor-web-app-sql) | Contoso migrates its SmartHotel360 app to an Azure web app and migrates the app database to an Azure SQL Server instance with the Database Migration Assistant.
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[Article 10: Refactor a Linux app in an Azure web app and Azure Database for MySQL](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-refactor-linux-app-service-mysql) | Contoso migrates its Linux osTicket app to an Azure web app on multiple Azure regions using Azure Traffic Manager, integrated with GitHub for continuous delivery. Contoso migrates the app database to an Azure Database for MySQL instance.
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[Article 11: Refactor Team Foundation Server on Azure DevOps Services](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-tfs-vsts) | Contoso migrates its on-premises Team Foundation Server deployment to Azure DevOps Services in Azure.
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[Article 12: Rearchitect an app in Azure containers and Azure SQL Database](https://docs.microsoft.com/azure/architecture/cloud-adoption/migrate/azure-best-practices/contoso-migration-rearchitect-container-sql) | Contoso migrates its SmartHotel app to Azure. Then, it rearchitects the app web tier as a Windows container running in Azure Service Fabric, and the database with Azure SQL Database.
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## Complete the migration
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1. After the migration is done, right-click the VM > **Stop migration**. This stops replication for the on-premises machine, and cleans up replication state information for the VM.
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1. After the migration is done, right-click the VM > **Stop migration**. This does the following:
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- Stops replication for the on-premises machine.
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- Removes the machine from the **Replicating servers** count in Azure Migrate: Server Migration.
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- Cleans up replication state information for the VM.
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2. Install the Azure VM [Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/agent-windows) or [Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/agent-linux) agent on the migrated machines.
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3. Perform any post-migration app tweaks, such as updating database connection strings, and web server configurations.
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4. Perform final application and migration acceptance testing on the migrated application now running in Azure.
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## Complete the migration
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1. After the migration is done, right-click the VM > **Stop migration**. This stops replication for the on-premises machine, and cleans up replication state information for the VM.
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1. After the migration is done, right-click the VM > **Stop migration**. This does the following:
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- Stops replication for the on-premises machine.
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- Removes the machine from the **Replicating servers** count in Azure Migrate: Server Migration.
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- Cleans up replication state information for the machine.
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2. Install the Azure VM [Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/agent-windows) or [Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/agent-linux) agent on the migrated machines.
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3. Perform any post-migration app tweaks, such as updating database connection strings, and web server configurations.
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4. Perform final application and migration acceptance testing on the migrated application now running in Azure.
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title: Migrate VMware VMs with agent-based Azure Migrate Server Migration
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description: Learn how to run an agent-based migration of VMware VMs with Azure Migrate.
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ms.topic: tutorial
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ms.date: 11/19/2019
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ms.date: 03/09/2020
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ms.custom: MVC
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- The Azure Migrate replication appliance can do a push installation of this service when you enable replication for a machine, or you can install it manually, or using installation tools.
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- In this tutorial, we're going to install the Mobility service with the push installation.
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- For push installation, you need to prepare an account that Azure Migrate Server Migration can use to access the VM.
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- For push installation, you need to prepare an account that Azure Migrate Server Migration can use to access the VM. This account is used only for the push installation, if you don't install the Mobility service manually.
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Prepare the account as follows:
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## Complete the migration
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1. After the migration is done, right-click the VM > **Stop migration**. This stops replication for the on-premises machine, and cleans up replication state information for the VM.
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1. After the migration is done, right-click the VM > **Stop migration**. This does the following:
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- Stops replication for the on-premises machine.
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- Removes the machine from the **Replicating servers** count in Azure Migrate: Server Migration.
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- Cleans up replication state information for the VM.
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2. Install the Azure VM [Windows](https://docs.microsoft.com/azure/virtual-machines/extensions/agent-windows) or [Linux](https://docs.microsoft.com/azure/virtual-machines/extensions/agent-linux) agent on the migrated machines.
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3. Perform any post-migration app tweaks, such as updating database connection strings, and web server configurations.
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4. Perform final application and migration acceptance testing on the migrated application now running in Azure.
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