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Virtualization. What the Dramatic Changes in Server Management Mean to Us. This is a Traditional Server Room. This is a Virtualized Server Room. On average, 10% of server processor is utilized per server*. *per IDC.

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virtualization
Virtualization

What the Dramatic Changes in Server Management Mean to Us

how it works 1
How It Works (1)
  • Server virtualization uses a Hypervisor - a streamlined Operating System with connectivity, virtualization and management features.
  • Intel and AMD include virtualization support on specific chipsets; this is required for some server virtualization products.

Peter Campbell, Techcafeteria August, 2008

how it works 2
How It Works (2)
  • Virtual machines (VMs) are loaded into memory by the Hypervisor. They emulate standalone servers.
  • Users connect to VMs, but VMs can be copied and moved without interruption.
  • Load Balancing and Fault Tolerance can be used to mirror VMs and insure business continuity.
potential issues
Potential Issues
  • This is all still pretty new - assumptions about proper configuration and server requirements still vary.
  • Virtualized databases can be impacted by conflicts between virtualization and caching.
  • There is some debate about whether domain controllers should be virtualized.
  • Smaller vendors might resist supporting virtualized applications; large vendors won’t.

Peter Campbell, Techcafeteria August, 2008

products
Products
  • Commercial
    • VMWare (Server, Desktop, Fusion)
    • Citrix Xen Server and Desktop
    • Microsoft Virtual Server, WinServer 2008
    • Virtual Iron
  • Open Source
    • Xen (FOSS version of Citrix product)
    • KVM
    • VirtualBox

Peter Campbell, Techcafeteria August, 2008

questions
Questions

Peter Campbell, Techcafeteria August, 2008

virtualization scenarios

Virtualization Scenarios

Matthew Eshleman

Director of Professional Network Services

Community IT Innovators

[email protected]

www.citidc.com

tools terminology
Tools & Terminology

Virtualization Hypervisor

Physical to Virtual Conversion Software

Storage Area Network (SAN)

iSCSI or Fiber Channel SAN Connection

Storage Management (LUN)

Backup & Disaster Recovery RPO & RTO

backup disaster recovery
Backup & Disaster Recovery
  • Backup
    • What are the RPO and RTO requirements?
    • Use existing backup to tape or disk
    • Online backup services
    • Backup appliances
  • Disaster Recovery
    • Part of business continuity
    • Manual or Automated systems
small office virtualization
Small Office Virtualization

Single SBS Server

Server out of warranty & out of space

Additional services required

Accounting server

Terminal server

Intranet

etc

small office virtualization25
Small Office Virtualization

Benefits

Preserve existing server

Expand HW capacity

Minimal user disruption

Lower HW Costs

Adds flexibility

Risks

Adds complexity

Need to adjust backup plan

Single point of failure

mid sized consolidation
Mid Sized Consolidation

2-6 existing physical servers

Increasing application requirements

Increasing availability requirements

Maxing out electrical system

Maxing out cooling system

mid sized consolidation28
Mid Sized Consolidation

Benefits

Lowered Hardware Costs

Reduced Warranty Expense

Reduced Energy Consumption

Improved HW utilization

Risks

Solution needs to be appropriately designed

Consider backup & disaster recovery requirements

Adds complexity

Server sprawl

enterprise virtualization
Enterprise Virtualization

Appropriate starting at 4-8 physical servers

High availability

Highly flexible and expandable

Dedicated IT staff

Significant investment

enterprise virtualization31
Enterprise Virtualization

Benefits

Lowered Hardware Costs

Reduced Warranty Expense

Reduced Energy Consumption

Improved HW utilization

High availability

Flexibility

Risks

Software costs

Complexity

Management

virtualization conclusions
Virtualization Conclusions

Virtualization can be used in most cases

Requires appropriate planning

Provides additional flexibility and cost savings

Relatively low barrier to entry

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