how virtualization tools change the...

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How Virtualization Tools Change the

Datacenter Jamie Butler, Director of IT – UC Davis School of Law

Dan Cantrell, Systems Group Manager – Duke University School of Law

  Who we are

  Terms

  Goals

  Agenda

Introduction

  Virtualization

  Hypervisor   VMI   Para-virtualization   Bare Metal

  Live Motion

  Virtual Snapshots

Terms

  Benefits

  Case Study – UC Davis

  Advanced Topics

  Case Study – Duke

  Questions

Agenda

  Utilization

  Legacy System Support

  Transportation and Encapsulation

  High Availability

  Better Use of Clustering

  Flexibility

Benefits

Case Study

Virtualization Infrastructure Chosen

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

VMware Infrastructure 3 Editions

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

Additional Management Software

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

Hardware Requirements

•  3 Dell 2950 Dual Quad Core w/ 16GB RAM

•  1 Dell 1950 Dual Core w/ 4GB RAM

•  1 MD3000i iSCSI Storage Arrage w/ 4.5TB Raw

•  2 PowerConnect 5424 iSCSI GigE Switches

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

Conversion/Migration Process •  Initially 12 Machines

– Physical Servers and Virtual Machines – Mix of Web, File, Print, and Application

•  Now 24 Machines – Web, File, Print, Application – Plus Backup Domain Controller, DNS, DHCP, and

Dev/Build Machines

•  No SQL or Exchange

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

Average Consolidation Ratio •  Before:

– Average of 5% CPU Utilization per box – Average of 25% Memory Utilization per box

•  After: – Average of 10% CPU Utilization per box – Average of 40% Memory Utilization per box

•  Better than 12 to 1 Consolidation Ratio

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

Caveats

•  Issues with Private Network

•  Virtual Network Switches w/ VLAN

Tagging

•  Issues with VMotion across different CPUs

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

Costs •  Initial:

– $45k - Hardware – $10k - VMWare Licenses and 1 yr Support – $2k – Windows Datacenter 2008 w/ SA – $15k – Training

•  Ongoing: – $2k – VMWare Support – Hardware Replacement Cycle

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

Windows Licensing For Windows Server 2003 R2 Datacenter

Edition: Running Instances of the Server Software.

•  For each server to which you have assigned the required number of software licenses, you may run on the licensed server, at any one time:

–  One instance of the server software in the physical OSE, and

–  Any number of instances of the server software in virtual OSEs (only one instance per virtual OSE).

•  However, the total number of physical processors used by those OSEs cannot exceed the number of software licenses assigned to that server.

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

Support Services Feature Gold Support Hours of Operation 12 Hours/Day

Monday–Friday

Length of Service 1, 2 or 3 Years

Product Updates Yes

Product Upgrades Yes

Products Supported All Products (excluding VMware Fusion and VMware Player)

Method of Access Telephone/Web

Response Method Telephone/Email

Remote Support Yes

Access to VMware Web Site Yes

Access to VMware Discussion Forums and Knowledge Base Yes

Max Number of Support Administrators per Contract 4

Number of Support Requests Unlimited

Target Response Times Critical (Severity 1) Major (Severity 2) Minor (Severity 3) Cosmetic (Severity 4)

4 business hours 8 business hours 12 business hours 12 business hours

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

Moving Forward

•  + More Memory

•  Watch for Virtual Machine Sprawl

•  Careful Patching/Restarting

400 Mrak Hall Drive; Davis, California 95616; t: 530.752.0243; f: 530.752.7279

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Advanced Topics

Live Virtual Machine Backups

  Guest OS running native backup client

  Point-in-Time VM snapshot

  3rd Party tools for ASYNC replication

Disaster Recovery

  Dissimilar hardware at DR site

  Reduced capacity and cost at DR site

  Automated failover tools (DNS, IP addrs, etc)

Virtualization Comparison Scenario

  Mix of Windows and Unix

  Highly available for production use

  Hosted on 4 machines, 2 multi-core CPU’s each

  Running 30 VM’s

  Academic pricing

  Business hours support

Pricing

  Microsoft Hyper-V: $5600 + per incident support

  VMWare ESX: Standard $7000 / Advanced $16000

  Citrix XenServer: Enterprise $8400

  Redhat Virtualization: $6000

Features

Citrix Xen MS Hyper-V Redhat KVM ESX

Live Migrate Yes Yes Yes Yes

Dynamic Provisioning

Yes Yes No Yes

Storage Migration

Yes No No Yes

Clustered Filesystem

No No GFS VMFS

Statistics No Yes No Yes

Site Replication

No Yes No Yes

Live VM backups

Hardware required

MS VSS based

Linux LVM based

VM based snapshot

Support

  Microsoft Hyper-V is Microsoft support

  VMWare and Citrix will solve the problem fast

  Redhat can solve the problem in most cases

What about FREE?

Feature Citrix Xen Hyper-V RH KVM ESXi

Multi-pathing Free Difficult! Free Free

Live Migration

Free No Limited No

VM snapshots

Only forward No snapshots

Limited snapshots

Full snapshots

Guest OS support

Most Unix & Windows

Windows & Few Unix

Limited Windows & Unix

All OS’s

Memory Over subscribe

No No No Yes

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Duke University School of Law

Virtualization Project

Project Goals

  Use existing budget

  Repurpose existing hardware

  Increase service reliability

  Legacy host support

Hardware Layout

Resources & Links

  Full Virtualization vs. Para Virtualization   http://blog.taragana.com/index.php/archive/virtualization-technologies-full-virtualization-versus-para-virtualization/

  http://www.vmware.com/interfaces/paravirtualization.html

  Virtualization software comparisons   http://www.itcomparison.com/Virtualization/VMwareesxivsHyperv/VMwareesxivsHyperv.htm

  http://www.itcomparison.com/Virtualization/MShypervvsvi35/HyperVvsvmware35esx.htm

  http://en.wikipedia.org/wiki/Comparison_of_platform_virtual_machines

  http://www.vmware.com/pdf/hypervisor_performance.pdf

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