Leveraging azure and cello for multi tenancy

Leveraging Azure and Cello for
Delivering Highly Scalable Multi-Tenant
SaaS Solutions
The smartest and fastest way to build
configurable, high quality applications
that can be deployed on any cloud…

Agenda
 Understanding Multi-Tenancy Models
 Why Scalability is critical for Multi-Tenant Architecture?
 What is Cello and How does Azure and Cello work together?
 Advantages of Azure and Cello combination
 Deployment in Azure
 Benefits for ISVs
SaaS Life Cycle Management Solution

Multi-Tenancy Models
Single Tenant
Multi Tenant
 Single and Multi Tenant are the
two approaches that ISVs
typically take for delivering
their SaaS solution.
 Single Tenant Solutions
typically involve setting up
separate instances for each
customer
 Multi Tenant Solutions service
multiple customers (tenant)
from a single instance, there by
sharing all the hardware
resources

Scalability in Multi-Tenant Architecture
Why Scalability is critical for Multi-Tenant architecture?
 Multi-Tenant systems experience heavy
load due to the fact that single instance
serves multiple customers
 Load on the system is going to be
directly proportional to the number of
customers serviced.
 SaaS Business model is only profitable
with higher number of customers.
Therefore, it’s suicidal if you are not
building a multi-tenant architecture that
is scalable at all levels.

Azure & Cello
How does Azure and Cello work
Together?

Azure & Cello – Complement Each Other
Cache
Active
Directory
Storage Database
Traffic
Manager
Azure Watch Auto Scale
Online
Services
For ISVs
Cello provides the SaaS
Engineering/Management features
Azure provides the infrastructure
management features.

What is Cello?
 Techcello is a cloud-ready, SaaS Application
Development Framework for Azure platform
 Can be used to,
 Build new SaaS products
 Convert single-tenant Apps to Multi-
Tenant
 Migrate on premise products to SaaS
model
 Cello framework is delivered as a set of
libraries and APIs that can be easily integrated
to your product
 Applications built using Cello can be easily
deployed in Azure
 Cello contains building blocks for developing,
monetizing and servicing ISV’s customers.

Cello – Technology Stack
Technology Stack
Production Environment
Windows Server 2012
IIS 8.0
SQL Azure
AppFabric/Azure Cache
.NET (v4.5)
• C#, ASP.NET,
• MVC, WIF
Middle Layer
• EF 6.0
• WCF
• AppFabric Cache/Azure Cache
Database
• SQL Azure
Development Environment
Windows 7/8
Visual Studio 2012

Advantages of Cello and Azure Combination
 Azure and Cello combination gives a perfect platform for ISVs to build
their product.
 Cello brings in a wide range of engineering building blocks, operational
modules and subscription management tools. In other words, Cello offers
the complete SaaS Life Cycle Management Solution.
 ISVs will have the option of exposing some of the Cello administration
features to tenants in the form self-servicing portal. This can bring down
significant amount of support team load.
 Azure on the other hand provides infrastructure and application life cycle
management in the form of deployment support, monitoring tools,
online services, etc.
 While Cello strengthens the product with a scalable and robust
architecture, Azure provides a scalable and secure infrastructure.

Typical Deployment in Azure
Web Roles
Worker Roles
Auto Scale
Traffic Manager
Cache
Active
Directory
Table/
BLOB
SQL
Azure
SQL
Azure
SQL
Azure
Web Role
Product
Web
Pages
Binaries
Cello
Web
Pages
Binaries
Worker Role
Product
Services Binaries
Cello
Services Binaries
SQL Azure
Product
Tables
Cello
Tables
Product Data
Other
Services
Auto Scale
Azure Services
Cello
Data

Typical Deployment in Azure
 ISVs can choose to deploy their product in either web role/worker role
model or they can also choose the VM model (which is vanilla IaaS).
 Cello is delivered in the form of APIs and libraries, which has to be
deployed along with the product. Web role will contain the Cello web
pages and binaries. Cello services will have to be deployed in Worker
role.
 Cello data is maintained separately and will have to be setup in SQL
Azure database. However, the product database can point to any storage
technology offered by Azure.
 Product can leverage all the services offered by Azure platform. Cello
does not bring in any limitations for the product.

Cello Offers Unlimited Scalability
Web Server
Database Server
Application
Database
Cello
Database
Single Shard
Load Balanced
Web Servers
Database Server
Application
Database
Cello
Database
Double Shard
Database Server
Application
Database
Common for all
tenants
Tenant 1
to X
Tenant
(X+1) to Y

Cello Offers Unlimited Scalability
 Cello architecture is designed for unlimited scalability at all layers.
 Products built using Cello design norms by default inherit the capability
to dynamically scale out without any coding efforts.
 ISVs can initially start with a single sharded model. However, when the
load increases they can easily add additional resources in the form of
machines, databases, storage etc.
 Azure Watch can be effectively utilized to monitor the load of the systems
and once the threshold is reached it will automatically add additional
machines.
 Cello leverages Azure Data Sharding feature by abstracting the database
from Developers. This allows ISVs to shard by tenants and/or modules.

Tenant and Module Based Sharding
Tenant 1 to x
Load Balanced App Servers
Tenant x+1 to y Tenant y+1 to z Dedicated DB
User Load
Tenant 1 to x Tenant x+1 to y Tenant y+1 to z Dedicated DB
Module B
Module A

Benefits for ISVs
“The Techcello approach is likely to be ideal for companies -especially independent software vendors - that need to
get to market relatively quickly with a multitenant SaaS solution and would like a substantial shortcut while avoiding
lock-in to a proprietary application platform as a service (aPaaS)”
- Gartner Research

Contact Us
Web : http://www.techcello.com
General Enquiry : info@techcello.com
Support Enquiry : support@techcello.com
Sales Queries: sales@techcello.com
Register here for a Self-Guided Live Tour of Cello
http://resources.techcello.com/techcello-demo-live-access

Leveraging azure and cello for multi tenancy

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