cloud computing introduction (powerpoint 2003)
TRANSCRIPT
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An Introduction to
SaaS and Cloud Computing
Ross Cooney
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The challenge
Add new services for your users quickly and cost effectively
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Expand your Infrastructure!
Buy new servers, increase your
software costs, provision more
datacenter capacity!!
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Look to the cloud!Pay for the bandwidth and server resources that you need. When
your push is done then turn the whole
thing off!
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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.
What isCloud Computing?
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The hype
Cluster ComputingCloud ComputingGrid Computing
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IaaSInfrastructure as a Service
PaaSPlatform as a Service
SaaSSoftware as a Service
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SaaSSoftware as a Service
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Software delivery model
• Increasingly popular with SMEs
• No hardware or software to manage
• Service delivered through a browser
SaaS
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Advantages
• Pay per use• Instant Scalability• Security• Reliability
• APIs
SaaS
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Examples• CRM
• Financial Planning
• Human Resources
• Word processing
Commercial Services:• Salesforce.com
• emailcloud
SaaS
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PaaSPlatform as a Service
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Platform delivery model
• Platforms are built upon Infrastructure, which is expensive
• Estimating demand is not a science!
• Platform management is not fun!
PaaS
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Popular services
• Storage
• Database
• Scalability
PaaS
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Advantages
• Pay per use• Instant Scalability• Security• Reliability
• APIs
PaaS
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Examples
• Google App Engine
• Mosso
• AWS: S3
PaaS
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IaaSInfrastructure as a Service
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Computer infrastructure delivery model
Access to infrastructure stack:– Full OS access– Firewalls– Routers– Load balancing
IaaS
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Advantages
• Pay per use• Instant Scalability• Security• Reliability
• APIsIaaS
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Examples
• Flexiscale• AWS: EC2
IaaS
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IaaSInfrastructure as a Service
PaaSPlatform as a Service
SaaSSoftware as a Service
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Common Factors
• Pay per use• Instant Scalability• Security• Reliability• APIs
IaaS
PaaS
SaaS
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Advantages
• Lower cost of ownership
• Reduce infrastructure management responsibility
• Allow for unexpected resource loads
• Faster application rolloutIaaS
PaaS
SaaS
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Cloud Economics
• Multi-tenented
• Virtualisation lowers costs by increasing utilisation
• Economies of scale afforded by technology
• Automated update policyIaaS
PaaS
SaaS
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Examples of usage
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• 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.
SaaS
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• 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.
PaaS
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• 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.
IaaS
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Network Design
• Management Node
• Various scan arrays
• Cloud burst
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Administration (ARACNE)
• Hosted in the Databanx
facility in Newcastle
• Over £250,000 invested
• Redundant hardware
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Our scan arrays
• Each scan array contains 9 servers
• Each array can scan over 1m emails a day at 20% utilisation
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Cloudburst
• New scan array in 5 minutes
• Cost of $0.90 per hour
• Use only when your network needs a burst of capacity.
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Why Cloud Computing?
• Pay per use• Instant Scalability• Security• Reliability
• APIs