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    which deployment option offers the best compatibility when migrating an existing sql server on-premises solution?

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    Three Options for Migrating SQL Servers to Azure

    Are your traditional on-premises SQL Server databases holding your business back? For users looking to accelerate their digital transformation, migrating from a traditional on-premises SQL Server database to an Azure SQL Database offers several benefits. These include reduced costs, increased innovation capabilities, tighter security measures, and compliance with regulations.    Migrating to Azure is the logical next step for many businesses who may need to increase capacity, rethink their disaster recovery method, or reduce unnecessary costs.   […]

    Three Options for Migrating SQL Servers to Azure

    Arraya Insights | January 5, 2022

    Are your traditional on-premises SQL Server databases holding your business back? For users looking to accelerate their digital transformation, migrating from a traditional on-premises SQL Server database to an Azure SQL Database offers several benefits. These include reduced costs, increased innovation capabilities, tighter security measures, and compliance with regulations.

    Migrating to Azure is the logical next step for many businesses who may need to increase capacity, rethink their disaster recovery method, or reduce unnecessary costs.

    For those looking to further their digital transformation, there are three options available for a SQL migration. Below, we’ll breakdown what each option offers, who is best suited to each option, and what users can expect in costs and licensing.

    Azure SQL Database 

    Microsoft: Manages the infrastructure, operating system, and the SQL instance You: Manage the database

    Azure SQL Database is an intelligent, scalable, relational database service built for the cloud. This fully managed database automates updates, provisioning, and backups. In addition, it offers flexible and serverless compute with hyperscale storage to adapt to any changing needs.

    SQL Database has two deployment options:

    Single Database (DBaaS): This is an isolated database with its own set of resources managed by a logical SQL server.Elastic Pools (DBaaS): This is a collection of databases with a shared set of resources managed via a logical SQL server. Individual databases can be moved in and out of an elastic pool providing a cost-effective solution for managing the performance of multiple databases that have variable usage patterns.

    These options are best for modern cloud applications that want to use the latest stable SQL Server features but face time constraints in development and marketing. They offer a fully managed SQL Server database engine, which is based on the latest stable Enterprise Edition of SQL Server. These are built on standardized hardware and software that is owned, hosted, and maintained by Microsoft.

    Cost & Licensing

    Azure SQL Database is sold as a service and available with several options and in several service tiers with different prices for resources. All resources are billed hourly at a fixed rate based on the service tier and compute size.

    Managed Instances (PaaS) 

    Microsoft: Manages the infrastructure and operating systemYou: Manage the SQL instances 

    This fully managed SQL Server is a collection of Microsoft managed system and user databases with a shared set of resources. Azure SQL Managed Instances supports database migration from on-premises with minimal to no database change. With no code changes, you’ll have almost 100% compatibility.

    This intelligent, scalable cloud database service combines the broadest SQL Server database engine compatibility with all the benefits of a fully managed platform as a service.

    Azure SQL Managed Instances is best for new applications or existing on-premises applications that want to use the latest stable SQL Server features and that are migrated to the cloud with minimal changes.

    This option provides all the PaaS benefits of Azure SQL Database but adds capabilities that were previously only available in SQL Server VMs. This includes a native virtual network and near 100% compatibility with on-premises SQL Server. Instances of SQL Managed Instance provide full SQL Server access and feature compatibility for migrating SQL Servers to Azure.

    Cost & Licensing

    Managed Instances is sold as a service and available with several options and in several service tiers with different prices for resources. All resources are billed hourly at a fixed rate based on the service tier and compute size you choose. You can also bring your own license.

    Virtual SQL Server (IaaS) 

    Microsoft: Manages the infrastructureYou: Manage the operating system and the SQL instances

    Virtual SQL Server provides the performance and security of SQL Server with the flexibility and hybrid connectivity of Azure. This allows for an instance of SQL Server inside a fully managed virtual machine (VM).

    A SQL Server that is installed and hosted in the cloud runs on Windows Server or Linux virtual. SQL virtual machines are a good option for migrating on-premises SQL Server databases and applications without any database change. All recent versions and editions of SQL Server are available for installation in an IaaS virtual machine.

    What differentiates SQL Database and SQL Managed Instance is that SQL Server on Azure Virtual Machines allows full control over the database engine. Azure virtual machines also provide automated updates and backups and Azure storage providers higher availability and performance.

    Cost & Licensing: 

    For Virtual SQL Server, you can either pay-as-you-go for a SQL Server license already included in a SQL Server image or easily use an existing license. All the supported SQL server versions (2008R2, 2012, 2014, 2016, 2017, 2019) and editions (developer, express, web, standard, enterprise) are available. You can also stop or resume the VM, as needed.

    स्रोत : www.arrayasolutions.com

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    What is Azure SQL?

    Learn about the different options within the Azure SQL family of services: Azure SQL Database, Azure SQL Managed Instance, and SQL Server on Azure VM.

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    What is Azure SQL?

    Article 08/30/2022 18 minutes to read

    Applies to: Azure SQL Database Azure SQL Managed Instance SQL Server on Azure VM

    Azure SQL is a family of managed, secure, and intelligent products that use the SQL Server database engine in the Azure cloud.

    Azure SQL Database: Support modern cloud applications on an intelligent, managed database service, that includes serverless compute.Azure SQL Managed Instance: Modernize your existing SQL Server applications at scale with an intelligent fully managed instance as a service, with almost 100% feature parity with the SQL Server database engine. Best for most migrations to the cloud.SQL Server on Azure VMs: Lift-and-shift your SQL Server workloads with ease and maintain 100% SQL Server compatibility and operating system-level access.

    Azure SQL is built upon the familiar SQL Server engine, so you can migrate applications with ease and continue to use the tools, languages, and resources you're familiar with. Your skills and experience transfer to the cloud, so you can do even more with what you already have.

    Learn how each product fits into Microsoft's Azure SQL data platform to match the right option for your business requirements. Whether you prioritize cost savings or minimal administration, this article can help you decide which approach delivers against the business requirements you care about most.

    If you're new to Azure SQL, check out the What is Azure SQL video from our in-depth Azure SQL video series:

    Overview

    In today's data-driven world, driving digital transformation increasingly depends on our ability to manage massive amounts of data and harness its potential. But today's data estates are increasingly complex, with data hosted on-premises, in the cloud, or at the edge of the network. Developers who are building intelligent and immersive applications can find themselves constrained by limitations that can ultimately impact their experience. Limitations arising from incompatible platforms, inadequate data security, insufficient resources and price-performance barriers create complexity that can inhibit app modernization and development.

    One of the first things to understand in any discussion of Azure versus on-premises SQL Server databases is that you can use it all. Microsoft's data platform leverages SQL Server technology and makes it available across physical on-premises machines, private cloud environments, third-party hosted private cloud environments, and the public cloud.

    Fully managed and always up to date

    Spend more time innovating and less time patching, updating, and backing up your databases. Azure is the only cloud with evergreen SQL that automatically applies the latest updates and patches so that your databases are always up to date—eliminating end-of-support hassle. Even complex tasks like performance tuning, high availability, disaster recovery, and backups are automated, freeing you to focus on applications.

    Protect your data with built-in intelligent security

    Azure constantly monitors your data for threats. With Azure SQL, you can:

    Remediate potential threats in real time with intelligent advanced threat detection and proactive vulnerability assessment alerts.

    Get industry-leading, multi-layered protection with built-in security controls including T-SQL, authentication, networking, and key management.

    Take advantage of the most comprehensive compliance coverage of any cloud database service.

    Business motivations

    There are several factors that can influence your decision to choose between the different data offerings:

    Cost: Both platform as a service (PaaS) and infrastructure as a service (IaaS) options include base price that covers underlying infrastructure and licensing. However, with the IaaS option you need to invest additional time and resources to manage your database, while in PaaS you get these administration features included in the price. IaaS enables you to shut down resources while you are not using them to decrease the cost, while PaaS is always running unless you drop and re-create your resources when they are needed.

    Administration: PaaS options reduce the amount of time that you need to invest to administer the database. However, it also limits the range of custom administration tasks and scripts that you can perform or run. For example, the CLR is not supported with SQL Database, but is supported for an instance of SQL Managed Instance. Also, no deployment options in PaaS support the use of trace flags.

    Service-level agreement: Both IaaS and PaaS provide high, industry standard SLA. PaaS option guarantees 99.99% SLA, while IaaS guarantees 99.95% SLA for infrastructure, meaning that you need to implement additional mechanisms to ensure availability of your databases. You can attain 99.99% SLA by creating an additional SQL virtual machine, and implementing the SQL Server Always On availability group high availability solution.

    स्रोत : learn.microsoft.com

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