the vision at work the vision at work
Zero Downtime In Multi tenant
Software as a Service Systems
Toine Hurkmans
Principal, Research Engineering
Exact Software
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About Exact Software
• Founded 25 years ago
• Business Solutions for SMB space
• 100.000 Customers in 125 Countries
• Headquarters Delft, Netherlands
• 40 Subs World wide
• ± 2400 Employees
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WHAT DRIVES
OUR INDUSTRY?
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BUSINESSES
DRIVE THE INDUSTRY
NOT TECHNOLOGY
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the vision at work
the vision at work
Business Automation
Finance & administration
Increase complexity
Increase dependencies
Office automation
Business more complex
Increase of automation
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IT and Business
IT is Costs
IT is not Core Business
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the vision at work
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Business Software Today
• Single tenant, multi user
• On premise
• Closed Systems
• Incorporated in every day process
• Cost of ownership borne by business
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What drives our industry?
• Reduce Cost of Ownership
• Available & Reliability
• Increase Service Offerings
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What drives our industry?
Enterprises
Mid size
Businesses
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the vision at work
SAAS IS A
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SaaS is a Business Model
Provider
Consumer
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Virtualization
Single Tenant, Multi User
Thick Client
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Virtualization
Single Tenant, Multi User
On Premise
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Virtualization & SaaS
Single Tenant, Multi User
Virtual Machines
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Web applications
Single Tenant, Multi User
Thin Client
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Web applications and SaaS
Single Tenant, Multi User
Thin Client
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TOTAL COSTS OF
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Software as a Service environments
Single Tenant, Multi User
In the Cloud
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Total Costs of Ownership On-Premise Systems
Software Purchase
Software Maintenance
Infrastructure & Services
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Budget for On-Premise Systems
Software
Hardware
Professional Services
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Budget for Software as a Service
Software as a Service
Hardware
Professional Services
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Budget on Premise versus SaaS
0
10
20
30
40
50
60
70
80
90
100
Software
Hardware
Service
Total
Software as a Service
On Premise
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Budget for Software as a Service
Software
Hardware
Professional Services
SaaS Vendor Hardware
SaaS Vendor Services
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MULTI TENANCY
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SaaS Single Tenant environments
Single Tenant, Multi User
In the Cloud
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SaaS Multi Tenant Environments
Multi Tenant, Multi User
In the Cloud
Software as a Service
Web based
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Budget on Premise versus SaaS Multi Tenant
0
10
20
30
40
50
60
70
80
90
100
Software
Hardware
Service
Total
SaaS Single Tenant
On Premise
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Economy of Scale
C
o
s
ts
Number of Tenants
Added Value
Cost per Tenant
Costs Provider
Revenue Provider
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the vision at work
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INDUSTRY CASE
EXACT ONLINE
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Exact Online Architecture
Database
Business App. layer
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Exact Online System Maintenance and Migration
Maintenance & Release cycle
Do
wn
ti
me
sy
st
em
Backup
Update
Test
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Challenges
• Cost of Ownership
– Optimal use of hardware / infrastructure & services
– Optimize software maintenance and migration
• Growth of number of tenants and concurrent users
– Growth in amount of data
– Growth in database I/O
• Availability of system
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DOWNTIME
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Zero Downtime Application Outage
Master
Database
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Zero downtime Database Outage
Master
Database
Backup
Database
Application
Real time
Synchronization
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Zero downtime Database Outage
Master
Database
Backup
Database
Application
Real time
Synchronization
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Zero downtime Migration
Database V1
Application V1
Data Migration
Synchronization
Database V2
Application V2
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the vision at work
Application Scalability: Server Grids
Load Balancer
Server grid
Clients
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CHALLENGES FOR THE
INDUSTRY
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• Current solution developed for Single tenant systems, On
premise systems
• Solutions are based on duplication
– Use of power (hardware, servers)
– Direct increasing cost of ownership
• Not scalable enough
– The costs do not reduce with the number of tenants
– Minimum requirement is for costs to be linear
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Software Development Trends
• Smaller development iterations
– More frequent updates
– More stress on system maintenance
• Software maintenance becomes migration
• Software migration continues process
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Challenges
• Operational costs reduction
– Infrastructure costs
– Maintenance & Migration
• No threatening of operational integrity
– Backup / restore
– Availability & Performance
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Question to You
Software Integration and Evolution at Runtime.
Data Integration and Evolution at Runtime?
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