How to implement a Multi-Tenant web application using Asp.net MVC3 and Entity Framework.

1. Multi-tenancy with MVC3
and Entity Framework
-By Lasantha Bandara

2. What is a Tenant?
 Literally
“A person who occupies land or property
rented from a landlord”

3. Is there any better example
than Exilesoft…?

4. Is there any better example
than Exilesoft…?
Moota

5. Is there any better example
than Exilesoft…?
Moota
Pro-Account

6. They are Tenants of Exilesoft…
Moota
Pro-Account

7. Same situation applies to the cloud
based software applications.
 In
SaaS (Software as a Service) Model
 Most of the web applications are SaaS – But not
Multi-Tenant…!
 Multi-Tenant Examples,
 Highrise
 Jira
 YaY
 In these systems, organizations make their
accounts and they are provided a look and feel
of their own „Home‟

8. Why this is so important?
 Data is vital for some businesses.
 Should be able to isolate data among
tenants in SaaS model.
 If
we provide it…. We have Competitive
Advantage.

9. That implies…
Data Architecture is the most
significant factor in a Multi
Tenant Application.

10. We can identify 3 different
architectures at present…
 Separate DB – Separate Schema
 Shared DB – Separate Schema
 Shared DB – Shared Schema

11. Separate DB – Separate Schema
 Extendibilitywith tenant specific requirements
 Easy Backup
 High Cost
 Suitable for Medical and Banking applications in
spite of high cost

12. Shared DB – Separate Schema
 Separate set of tables for each tenant in same
DB
 Extendible and easy to implement
 Suitable if No. of Tenants < 100
 Low cost than the previous one

13. Shared DB – Shared Schema
 Lowest Cost
 Additional development effort
 Less security
 Each row contains tenant Id
 Suitable for a huge cluster of tiny tenants

14. Choosing an approach
 Cost Based

15. Security
Shared Isolated

16. Tenant Attributes

17.  Regularity Consideration
(legal requirements of companies)
 Skills set of development team
etc…

18.  InYayCRM we have invented a model
that is supported all those architectures
 You can,
- distribute databases in a server farm
- expand and shrink the number of
databases
- move tenants among databases

19. Metadata Tenant
Database Databases
Client Application
Server

21. Let’s go to demo…