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Virtualization Journey Challenges And Opportunities By Sr Balasubramanian
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What is Virtualization• Virtualization enables us combine servers from
multiple generations into the same virtualized server pool.
• Virtualization allows a group of inefficient servers to be replaced with a fewer number of machines.
• Virtualization is a software that allows a piece of hardware to run multiple operating system images at the same time.
The need for Virtualization
Earlier practices had the following drawbacks:-
• Addition of too many servers (Tower and Rack Servers) to run additional applications
• Sub-optimal utilization of servers
• Problems of managing an army of servers
• Space consolidation in Data Center
Types of VirtualizationServer Virtualization
• Converting several physical servers into a pool of Virtual servers
Storage Virtualization• The process of completely abstracting logical storage from
physical storage
Application Virtualization• The hosting of individual application
Desktop Virtualization• User interface is as per profile setup centrally- can access from
any desktop. Means Data, Application, OS - all reside in a virtual environment
Benefits of Virtualization
• Lower investment (CAPEX) on hardware
• Minimum physical space requirement
• Better utilization of hardware resources
• Less power consumption
• Less maintenance overhead of IT
• Provision for resources on demand
• Patch management and upgrade become easier
• Disaster recover planning (DRP) become easier
• In case of interruption of services, one can backup and even
migrate entire virtual environment
IMPLEMENTATION ISSUES
• To plan and procure licenses
• Arrange for adequate and appropriate hardware, capacity
planning
• To evaluate and select partner to implement, configure
and activate
• Take care of interface with storage, backup devices etc
• Install tools for management
MANAGEMENT
• Use tools for health check
• Performance management
• Allocation and reallocation of resources
• Retain a partner for help on an on-going basis
Resources for Virtualization
HARDWARE
Blade Servers High end servers-Logical
partitioning Micro partitioning (Further
sub-division of the processor)
SOFTWARE
Virtualization Software. e.g. IBM, HP, VMware, Citrix, Red Hat (Xen, kvm), Microsoft (Hyper-V).
Hypervisor layer (software emulating hardware)
S.A.N. Network switches
Sharing experience on Consolidation
Tower Model One Physical server
Blade Servers Multiple thin servers in one Physical
server Resulting reduction of Power and
space in datacenter
Sharing experience on Server Consolidation
Servers Consolidation Servers are placed in data
center in Head Office to centrally host applications
Data center has close to 80 servers
After using ‘Virtualization’, Number of servers reduced to 36 boxes (Blades)
Sharing of Datacenter after Virtualization
THANKS