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2. Right now, I use single field Primary Key which is Id (Guid). Ayende@Rahien blog Multi Tenancy - The Physical Data Model CloudExpo SaaS - Multi-Tenant Database Design Options. You can still go with a multi-tenant database design, but in the end state you will have a mix of multi-tenant and single-tenant databases. (7) Another point to consider is that you may have a legal obligation to keep one companies' data separate from anothers'. The Overflow #43: Simulated keyboards. Shared database, shared schema. If each tenant does not need physical separation of data and you don't plan on making tenant specific schema changes in the database then I would think a multi-tenant three database design SQL Server Central Mixing tables from different databases/applications into one database. For discussion, they're usually broken into three categories. If you put everyone in the same database, you're eventually going to hit a wall on your current hardware and then you're either going to move everyone to bigger hardware anyway. Since each customer will only be granted access to its own schema, its very easy to achieve customer isolation. Shared Database Shared Schema. Ask SQL Server Central One database or multiple? All the tables will have TenantId (Guid / UNIQUEIDENTIFIER) field. It's not hard to imagine that these databases simply perform worse. Keeping each tenant in a separate database makes it very easy to move a highly-demanding tenant to their own server, place their data/log files on faster I/O, etc. Should I use a single or multiple database setup for a multi-client application? Note that I'm not talking about single vs multi-database on a single SQL Server. MSDN blogs Moving to Multi-Tenant Database Model Made Easy with SQL Azure Federations. One database per tenant. A tenant identifier (tenant key) associates every row with the right tenant. 3. There are many important advantages to isolating a tenant in a database. And with a Tenant_ID column in every table, you'll also be able to apply row-level security if you're on SQL Server 2016 or the latest Azure SQL Database. It fully depends on your requirement as which approach to choose but if you want a truly multi-tenant application I would suggest the 3 rd approach i.e. Tenant data is isolated. Shared database, one schema per tenant. This app will be used by 1000-5000 customers. For Architecting a Database You can Opt for any One of the Following Three Approaches: 1. Separate Database. Browse other questions tagged sql-server sql-server-2008 database-design multi-tenant or ask your own question. But stepping back, you should plan to have multiple federated databases holding your tenant data. When you're designing a multi-tenant database, you generally have three options: So those are some of the Tips & Tricks you can use in order to be successful building Multi-Tenant Databases in Windows Azure SQL Databases. Therefore, the tenant identifier is the database schema itself. I'm building a multi-tenant app (single database, single schema) using ASP Web API, Entity Framework, and SQL Server/Azure database. Daniel Hutmacher Mar 27 '17 at 18:50 Yes, it make sense to have the TenantId in every table to avoid the unnecessary joins too. Posted: August 11, 2012. There are several approaches to multi-tenant databases. Featured on Meta Responding to the When you have a multi-tenant database, almost every table will have a tenant ID of some type, and these columns will be involved in almost every join operation. database-design - single - sql server multi tenant schema . Shared Database Separate Schema. I hope that helps and would love to have your thoughts about it. 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