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An Introduction toSaaS and Cloud Computing
The challenge
Add new services for your users quickly and cost effectively
What is the cloud?
IT as a service
Cloud allows access to services without user technical knowledge or control of supporting infrastructure
Best described in terms of what happened to mechanical power over 100 yrs ago
Now computers are simple devices connected to the larger cloud
Data processing, storage and software applications that used to run locally are now being supplied by big central computing stations. They're becoming, in essence, computing utilities.
The hype
Software delivery model
Increasingly popular with SMEs
No hardware or software to manage
Service delivered through a browser
Advantages
Pay per use
Instant Scalability
Security
Reliability
APIs
Examples
CRM
Financial Planning
Human Resources
Word processing
Commercial Services:
Salesforce.com
emailcloud
Platform delivery model
Platforms are built upon Infrastructure, which is expensive
Estimating demand is not a science!
Platform management is not fun!
Popular services
Storage
Database
Scalability
Advantages
Pay per use
Instant Scalability
Security
Reliability
APIs
Examples
Google App Engine
Mosso
AWS: S3
Computer infrastructure delivery model
Access to infrastructure stack:
Full OS access
Firewalls
Routers
Load balancing
Advantages
Pay per use
Instant Scalability
Security
Reliability
APIs
Examples
Flexiscale
AWS: EC2
Common Factors
Pay per use
Instant Scalability
Security
Reliability
APIs
Advantages
Lower cost of ownership
Reduce infrastructure management responsibility
Allow for unexpected resource loads
Faster application rollout
Cloud Economics
Multi-tenented
Virtualisation lowers costs by increasing utilisation
Economies of scale afforded by technology
Automated update policy
Examples of usage
Your current CRM package is not managing the load or you simply don’t want to host it in-house….use a SaaS provider such as Salesforce.com
Your email is hosted on an exchange server in your office and it is very slow…outsource this using Hosted Exchange.
You need to host a large file (5Mb) on your website and make it available for 35,000 users for only two months duration. Use Cloud Front from Amazon.
You want to start storage services on your network for a large number of files and you do not have the storage capacity…use Amazon S3.
You want to run a batch job but you don’t have the infrastructure necessary to run it in a timely manner. Use Amazon EC2.
You want to host a website, but only for a few days. Use Flexiscale.
Network Design
Management Node
Various scan arrays
Cloud burst
Administration (ARACNE)
Hosted in the Databan x facility in Newcastle
Over £250,000 invested
Redundant hardware
Our scan arrays
Each scan array contains 9 servers
Each array can scan over 1m emails a day at 20% utilisation
Cloudburst
New scan array in 5 minutes
Cost of $0.90 per hour
Use only when your network needs a burst of capacity.
Why Cloud Computing?
Pay per use
Instant Scalability
Security
Reliability
APIs