If you are running an on-premise BI stack on Microsoft’s SQL Server, but running into maintenance, cost and scaling issues, you can consider moving your BI system to a cloud-based database service such as Azure SQL Database. Especially for your first BI stack, Azure SQL Database provides low startup costs with the ability to easily expand as business grows.
Advantages of Azure SQL Database
There are several benefits to moving on-premise SQL Server infrastructure to Azure:
- Physical acquisition, provisioning and maintenance of SQL Server deployments are a thing of the past. Furthermore, decreasing or increasing BI infrastructure is instantaneous with SQL Database elastic pools.
- Azure assists existing BI database migration to Azure SQL Database with wizard-based tools.
- All stored and transmitted data are encrypted via client-side keys.
- Microsoft accommodates third-party and open-source technologies, such as Python, Java, node.js, PHP and Python.
- SQL developers feel right at home using SQLCMD or SQL Server Management Studio for development.
SQL Database Limitations
Although all SQL Server components, SSIS, SSAS and SSRS are available on Azure, there are still areas where the Azure version is not completely fleshed out. For instance, only a growing subset of T-SQL features are yet available such as cursors, transactions, triggers, all data types, all operators plus logical, arithmetic and string functions.
Additionally, many T-QSL statements in SQL Database do not support every option available in SQL Server 2016, such as CREATE/ALTER for databases, logins, tables, users and views. Collation of system objects, cross-database queries with three- or four-part names, database collector, diagrams and mail, some events and certain database characteristics that were managed manually in SQL Server but are automatic in SQL Database are also missing.
For a full list of deficiencies, see Azure SQL Database Transact-SQL differences
Additional Azure Capabilities
SSRS is actually replaced with a separate service, SQL Reporting, which incurs a separate charge for reports. It is not a general reporting service since it only works with SQL databases. It does offer a nearly identical development interface to traditional SSRS.
Azure Tables is a storage service targeted at non-relational database storage, which is a type preferred for BI analysis processes. It stores up to 100TB of data via an Azure Storage account and supplies data in row form. Additional advantages include less cost than straight Azure storage and easy scaling.
Built on top of Hadoop, HDInsight offers unstructured data storage plus a number of tools, such as Sqoop, Pig and Hive for query processing. Your in-house SQL Server, Excel or SQL Database are all able to connect to this service.
Data Factory is Microsoft’s SaaS analogue to SSIS. It visually coordinates other services to transform raw, unstructured data via data flow pipelines into clean, transformed data ready for analysis engines such as HDInsight or Azure Machine Learning for predictive analytics.
In lieu of SQL Reporting, you can utilize Microsoft’s SaaS Power BI for report, dashboard and visualization creation. You can use this tool in conjunction with your on-premise SQL Server installation or stored spreadsheets too.
Steps to Migrating from SQL Server to SQL Database
SQL Database is, in theory, backward-compatible all the way to SQL Server 2005. In spite of this, the first step in migration is to test and fix any compatibility issues that may exist with SQL Database V12.
There are several methods to determine compatibility including the use of SQL Server Data Tools, the SqlPackage utility, SQL Server Management Studio’s Export Data Tier wizard and the SQL Azure Migration Wizard. SSDT, SSMS and SAMW can be used to fix any migration issues with your database also.
The next step is to create an Azure SQL Database logical server and migrate your existing data to it. Although other methods exist, the use of SQL Server transaction replication is the recommended solution since it minimizes live database downtime. Other solutions are to export/import BACPAC files when connection bandwidth is low or unreliable or use the SSMS database deploy wizard for smaller databases.
Running SQL Server in the Cloud Directly
There is nothing stopping you to begin or continue your SQL Server-based BI development and deployment without Azure SQL Database. Amazon AWS provides any level of SQL Server instantiation online with the advantages of computational, networking and storage elasticity on a pay-as-you-go basis. With a bit more lifting, you could do the same thing on Azure or AWS by utilizing their Virtual Machine services directly for your own SQL Server deployment.
Running BI analytics in the public cloud brings all the usual benefits of cloud-based operation, the most important of which are elastic storage for big data BI crunching systems and high availability in-house or mobile across the enterprise.
Whether or not your business should consider a cloud-based BI deployment depends on several factors including TCO, data volume, bandwidth requirements, security and the need to scale operations up or down quickly.
A wise approach is to work with an experienced Optimus BI consultant to collate all factors and develop a full BI architectural solution. Our experts can guide you towards the best solution for your needs.