1. Cloud &VirtualizationDuan van der WesthuizenPrivate
Cloud Product
2. A Difference in Philosophy and Approach Virtualization Cloud
Not elastic compute or Holistic approach to elastic storage solves
for infrastructure automation server consolidation Key drivers are
agility and Key driver are consolidation and automation, Capex to
Opex resource optimization and scalability Supports standard
application Applications built to elastically architecture. VM
functions scale in Cloud via API integration logically as
traditional server. Apps built to scale Horizontally Apps Scale
vertically by adding on commodity hardware more resources CPU, RAM,
etc. RACKSPACE HOSTING | WWW.RACKSPACE.COM 2
4. Architectural Differences - An Analogy Virtualization Cloud
Shared resources approach Shared-Nothing Architecture (Sharding)
Central controller Each node is independent Nodes cannot do
anything without and self-sufficient reporting to the hub No single
point of contention Single point of contention across the system
Limited scalability Scale to thousands by simply adding cheap
commodity hardware RACKSPACE HOSTING | WWW.RACKSPACE.COM
5. APP LAYER Scaling and Redundancy: The Different Approaches
Stateful vs. Stateless Applications Why Should You Care? RACKSPACE
HOSTING | WWW.RACKSPACE.COM
6. THE 1ST RULE OF CLOUDRedundancy in the Appnot the
INFRASTRUCTURE RACKSPACE HOSTING | WWW.RACKSPACE.COM
7. Redundancy inVirtualization Clustered hypervisors for high
availability Live migration technology for fault tolerance Multiple
levels of redundancy through backup hardware components RACKSPACE
HOSTING | WWW.RACKSPACE.COM
8. Vertical Scaling Larger equals more performance output,
limit to scale you can attain Multiple backup systems in
infrastructure enable redundancy RACKSPACE HOSTING |
WWW.RACKSPACE.COM
9. Horizontal Scaling Add smaller inexpensive nodes to increase
overall output. No limit to scalability One dies, simply replace
with another RACKSPACE HOSTING | WWW.RACKSPACE.COM
10. What Does This Mean for Apps? Vertical ScalingAdd more RAM
or move workload to Horizontal Scaling server with faster CPU to
increase Add more nodes and share the load, performance delete them
when youre done RACKSPACE HOSTING | WWW.RACKSPACE.COM
11. Application StateIts like a phone call to yourInsurance
providerStatefulAll your info is recorded by theoperator, the call
drops, you callback and you carry on where youleft off. No
interruption.StatelessYou spend the call relaying theinformation,
the call drops. Whenyou call back you have to repeat itall again.
No history of connection. RACKSPACE HOSTING |
WWW.RACKSPACE.COM
12. APPLICATION STATE Virtualization Cloud Servers are static,
therefore Cloud environments are not application state can be
effectively inherently redundant. Applications should be
architected for redundancy. managed on single server Cloud servers
can be created and No spin up and tear down effect deleted
dynamically creating state issues Applications need to be
architected Infrastructure such as load to manage state, otherwise
users will balancer can be used to manage not have a seamless
experience stateful connections RACKSPACE HOSTING |
WWW.RACKSPACE.COM
13. Finding the Best Fit Virtualized Apps Cloud Apps Corporate
Payroll Systems Big Data platforms ERP Systems Social Media
Traditional Ecommerce Platforms Apps Streaming Media Office
Collaboration Web 2.0 RACKSPACE HOSTING | WWW.RACKSPACE.COM
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