cloud computting a quick reference and guide
DESCRIPTION
My presentation material for cloud computingTRANSCRIPT
Understanding Cloud computing Finding a definition Some common services on cloud Understanding cloud as an IT professional Cloud Applications(SaaS) Cloud Platform
Platform as a Service(PaaS) Infrastructure as a Service(IaaS)
Private cloud Hybrid cloud
Windows Azure - demo
The cloud is many things to many people:
Online storage for an individual’s files and music? That’s the cloud.
Powerful servers hosted offsite to run a company’s proprietary business software? That’s the cloud, too.
Web hosting? The cloud.
Large file transfer that allows individuals to send their videos of their kids to the grandparents? Once again, the cloud.
Online software for managing a business? The cloud.
Online network management? The cloud.
Each point above describes a service that some vendor provides via the cloud. In truth, there are way too many of these services to list here,
and that’s the root of the problem.
Let’s talk about Bob (that’s him to the right):
If I told you Bob was hired to cook meals for a family, you might call him a chef.
If I then told you that Bob also cleaned the family’s house you might call him a housekeeper.
But what if Bob also did people’s taxes, worked at a moving company and was a doctor at the local clinic?
You might call Bob crazy, but that aside,
there’s really no one word that you can use to describe what he does.
“The cloud is made up of all the
services that vendors offer both
businesses and consumers
over the Internet”.
Along the same lines, what do you call something that:
Stores files Helps you manage your business Plays music Handles transactions Lowers the cost of doing business Markets your products Pay only for what you use Enables relationships with your customers and peers, and So very much more?
“The cloud” of course!
“The cloud is
made up of all the
services that
vendors offer both
businesses and
consumers over
the Internet”.
Drop box - Dropbox is like
your personal folder in the
sky (or in the cloud) that
can be accessed from
anywhere.
Google Drive - Google Drive
is just like Dropbox, but it
integrates with all of your
Google tools like Google
Docs, Gmail and others.
Spotify is a music streaming
service that charges you a
small monthly fee so that
you can enjoy thousands
upon thousands of songs as
often as you want.
Rdio is one of Spotify’s
main competitor, which
offers music streaming for
a similar fee.
Development Hosting Monitoring Support
Upgrade Scaling Storage/Network Managing
You manage your application yourself,
you manage your data centre yourself
runs its applications either in
“on-premises” data centre
OR
“on-premises” VMs
This is the usual strategy followed across the world
You ask your service provider to manage your application,
you don’t manage your data centre yourself.
Cloud computing changes in three ways Cloud applications(SaaS)
Commonly called Software as a Service(SaaS) Applications run on data centres own by somebody else
accessed via internet Cloud platforms(PaaS)
Foundations for cloud applications They also provide computing resourcing at data centres
accessed across the internet Private cloud
Cloud platform used by a single organization such as inside their own data centres
differentiating between its components.
These include
Understanding underlying technologies, Understanding the three Cloud Service Models
SaaS IaaS PaaS
Understanding how it is deployed, publicly or privately.
Cloud applications (SaaS)
Cloud platform(PaaS)
Private cloud
Next, we will see each of them in
detail starting with cloud application
Running application in a public cloud is referred to a Software as a Service.
SaaS applications are Cloud Applications running in public cloud accessed via internet
Google Apps +
more
Office 365 + more
Move to SaaS
It is real,
it is big
and it is happening
right now
Each tenant has his own separate application installation
More secure, More isolation
Allows customization
Customers often like this way of implementation
It is not vendors choice as it has not cost advantages
Support/Update/Maintain, it is lots of efforts
Tenants from various organization uses the same application instance
It is vendors choice
Some say if application is not multi-tenant, it is not SaaS
Benefits◦ Faster Deployment(because no
local installation is required)◦ Usage based pricing(letting you
pay only for what you use)◦ Less financial risk(with lower up-
front cost and try before you buy option)
◦ Reduced need for on premise resource and IT Staff
◦ Easier upgrade, with no on premise software to update
Risks◦ Requires trusting a SaaS provider
for availability and data security◦ Can raise legal/regulatory
concerns with storing data outside customer premises
◦ Can limit customization if tenants share multi-tenant applications
◦ Can be harder to integrate with on premise
◦ Can have lower performance than on premise application
Benefits◦ Offers potential to reach new
customers in broad market
◦ Can sell directly to business decision makers without going through IT
◦ Can provide more predictable revenue than traditional licensing
◦ Can lower support cost due to shared multi-tenant application
◦ Provide more knowledge about how customers use the application
Risks◦ Must demonstrate real value up-
front with try-before-you-buy option
◦ Revenue build up more slowly
◦ May less ability to sell customization
◦ Can bring new sales challenges –due to customer resistance to cloud
◦ Requires significant business challenges. e.g. pricing and sales
Customers◦ It is beneficial as long as the ◦ Risks are less, ◦ security concerns are not show
stoppers, ◦ Legal bindings and not against. ◦ Customers can take benefits of
the good thing it offers
Vendors◦ Everything changes◦ Life is different◦ Will be better for some one and
worst for some other◦ Change in sales, process, run
software, support software etc
However, there is no way to escape this, SaaS is real,
SaaS is big and SaaS is here.
It provides developers a platform to develop their applications.
It is common to use cloud platform to make cloud application(SaaS) but it is not necessary to have
We can also use hosting service to make SaaS applications
Cloud platform is for developers. It lets developers to create, run apps and store data and more(It is a platform not an app, your mother will not use cloud platform unless she is a developer)
It provides self service access to resources such as VM through browser
Cloud platform allows fine grained allocation of resources
A cloud platform allows charging only those resources an application uses
If I want a VM for 30 hours and if I want 30 VMs for 30 hours then, I need to pay only for that
Benefits◦ Faster Deployment(because no wait
for local computing resources)◦ Usage based pricing(letting you pay
only for what you use. Use more resources during spike hours)
◦ Less financial risk(with lower up-front investment in hardware and software)
◦ Reduced need for on premise resource such as Server and IT Staff
◦ Easier upgrade, with no on premise software to update
Risks◦ Requires trusting a Cloud platform
for availability and data security◦ Can raise legal/regulatory concerns
with storing data outside customer premises
◦ Can be harder to integrate with on premise software
◦ Can have lower performance than on premise application because of the remoter data center and poor network availability
◦ Can give developers less control in some scenarios
Infrastructure as a Service(IaaS)
Users creates VMs on demand from library of VMs
Platform as a Service(PaaS)
Developers gives the application and the platform runs it. They don’t create VMs
“hi platform, here is my app, run it”
User is not going to create VMs. It may be there or may be it is as if there.
What she has to do is simple add databases, install application that is all.
Everything the platform takes care of including load balancing.
PaaS is Faster There is less work for developers to do Application can go from idea to availability quickly
PaaS is Cheaper There is less admin and management works Organization spend less on supporting application
PaaS is lower risk Platform does more, leaving less room for errors Creating and running applications gets more reliable
PaaS is less familiar, VM are very familiar PaaS given less control to the developers PaaS is not identical to the on-premises. So
migration might take more time Once you set up you are locked in there
It is possible that in the long run PaaS may dominate but presently IaaS is dominating the cloud
Scenario IaaS PaaS
Creating new cloud native-app
Yes Yes
Running HPC & Big data apps
Yes Usually(some limitationswith hpc installation
Running existing web apps Yes May be
Running standard packaged app
Yes No
VM for a dev lab/Test Yes No(doesn’t provide std VMs)
VM for general on-demand use
Yes No
Disaster Recovery Yes No
“It is basically importing the technology into organizations own data centres”
When a User wants a VM he makes
Request to admin
Admin validates(it takes time)
Using VM management tool he manually creates VM
To avoid delay organizations go for private cloud
Admin creates VMs in advance with specifications and user rights in cloud
IT user requests for VM using self service portal and it is done then and there by avoiding the second step
Benefits◦ Faster Deployment of VMs and
applications(because it is automated)
◦ Reduced administrative cost(most of them are automated)
◦ Fewer deployment errors(due to automatic deployment of standard services)
◦ Easier cost management, with per VM charge back/show back
Risks◦ VM admins find it hard to trust
users
◦ VM admins resist to make things automated
◦ Defining standard services can be challenging since users want different things
◦ Changing operational processes is hard
Answer is Hybrid
Data center in private and front end server in public cloud
Leverage the server capacity
Reference http://pluralsight.com/training http://www.microsoft.com/en-
us/microsoftservices/cloud_computing.aspx
Video http://aka.ms/hjenad
