Ronen Gabbay

Microsoft Regional DirectorYside / Hi-Tech Collegeroneng@hi-tech.co.il

High availability with server 2008Server 2008 Network Load BalancingSetting up server 2008 clusterServer 2008 failover cluster capabilitiesCluster 2008 quorum modelStretched clusterMigration to server 2008 ClusterQ & ASummary

Network Load BalanceWindows ClusterWindows 2008 Virtualization

Support for IPV6Multiple Dedicated IP AddressesSupports rolling upgrade from Windows 2003 to Windows 2008.Supports for Unattended NLB InstallationSupports for NLB in server Core

Integrated Configuration Validation ToolStreamlined Setup & Easy ManagementNew HA Role WizardImproved SecurityEnhanced Quorum ModelNetwork Enhancements & Stretched Clusters

Testing Tool Built into the ProductCatch Hardware Configuration ProblemsRuns each time a Cluster is BuiltCan be used after the Cluster is up for diagnosticsReplace the Cluster HCL in server 2008

OS BinaryOS BinaryConsistencConsistenc

yy

ArchitectuArchitecturere

ConfigurationConfiguration

Correct and Same OS version Same Hot fix and Service Pack level

Same CPU architectureSame CPU architecture

Consistent Domain membershipConsistent Domain membership

Analysis of unsigned driversAnalysis of unsigned drivers

Storage HBA’s and Networking Storage HBA’s and Networking NIC’sNIC’s

DevicesDevices

InfrastructureInfrastructure

StorageStorage

NetworkNetwork

Shared Storage Persistent Shared Storage Persistent Reservation functionality and Reservation functionality and compliancecompliance

Disk I/O latenciesDisk I/O latencies

Each NIC has different IP addressEach NIC has different IP addressNetwork I/O latenciesNetwork I/O latencies

Failover simulationFailover simulationFunctionalityFunctionality

Inter-Cluster CommunicationInter-Cluster Communication

Shared disks accessible from all machines and uniquely identifiable

The Validate tool is the 1The Validate tool is the 1stst menu step menu step

Setup is simplified and IntuitiveSetup is simplified and Intuitive

Create a 16 node cluster in one stepCreate a 16 node cluster in one step

SimpleSimple

ValidationValidation

FastFast

Setting Up the Cluster has never been so easy

Majority Based Cluster MembershipFully Configurable who gets Voted

No Quorum DependencyIn case of quorum disk failure no Cluster failure

New Hybrid Model A combination of legacy MNS and Shared Disk Quorum

Majority of Nodes with the Witness based QuorumNo Single Point of failureNo Single Point of failurecan survive loss of the Quorum Diskcan survive loss of the Quorum Disk

New majority based quorum model

Majority of Nodes based quorum

Disk is optional witness to have a vote in deciding majority

3 total votes, with 2 needed for majority

So the Cluster can survive the loss of any 1 vote

SAN

Node 1 Node 2

Shared Storage Shared Storage Device gets 1 Device gets 1

votevote

VoteVoteVoteVote

VoteVote

Each node Each node counts as 1 counts as 1

votevote

Only Nodes get votes3+ Node votes without Shared Storage vote

Majority of votes needed to operate cluster

No shared disk vote

Node 3Node 1 Node 2

Replicated Storage Devices

Vote

Vote

Vote

Only Disk gets a vote

Nodes have no votes

Quorum disk is the master

Cluster stays up even if only 1 node can talk to the disk

Achieves same behavior as legacy quorum model

SAN

Node 1 Node 2

Shared Shared Storage Storage Device is Device is mastermaster

VoteVote

File Share Witness allows a 2-node cluster with no shared disk

Majority of Nodes + Witness based quorum

Excellent solution for GeoClusters

Witness could reside at a 3rd Site

Single file server could serve as the Witness for multiple clusters

Node 1 Node 2

File Share on an File Share on an independent independent

serverserver

VoteVoteVoteVote

WitnesWitnesss

Each node Each node counts as 1 counts as 1

votevote

No More Cluster Service User AccountThe Cluster runs with Local System Account with low privilegesNo Account Password ManagementMore Resilient for Configuration Issues

Simplified Setup with HA Role WizardIntegrated with Windows Explorer

Create Share like a Standalone Server

Fast Failover Major Performance improvement in brining the File Server resource online and offlineMinimum downtime for large amount of file shares

Tight integration of Hyper-V with Clustering

Wizards for creating highly available VM’sNew resource type to enable Quick Migrations

No more clunky scripts

Cluster is available with Window CoreSupport for : File Services (include DFS) , Print, DHCP, WINS and VirtualizationLess Serviceability that is more availabilityNo Graphic User Interface

Managed Locally using the Cluster.exe CLIManaged Remotely using the Cluster MMC

Install UsingStart / w ocsetup FailoverCluster-Core

Integrated with new Server 2008 TCP/IP StackFull IPv6 Support

Native IPv6 support for client access, native and tunnels Inter-node communication with IPv6

IPSec improvements for quick failoverDHCP Support for IPv4 Resources

Obtain cluster IP address from a DHCP serverRelieves management pain of static IP’s

But businesses are now demanding But businesses are now demanding more!more!

Stretching Stretching Nodes across Nodes across the river used the river used to be good to be good enough…enough…

No More Single-Subnet LimitationAllow cluster nodes to communicate across network routers

No more having to connect nodes with VLANs!

Configurable Heartbeat TimeoutsIncrease to Extend Geographically Dispersed Clusters over greater distances

Decrease to detect failures faster and take recovery actions for quicker failover

Exchange CCR Exchange CCR Replication Replication MechanismMechanism

Site ASite A Site BSite BWANWAN

Site CSite C

SANSAN SANSAN

\\Foo\Cluster1Complete resiliency and automatic recovery from the loss of any 1 site

File Share File Share WitnessWitness

Cluster Migration ToolWill assist migration of a cluster configurationfrom one cluster to anotherCopies resources and cluster configurations from one cluster to another

No Mixed Version CompatibilityServer 2008 node and Win2003 node can not be in the same cluster at the same time

No rolling upgrades

All nodes running Windows Server 2003

Group owned by Node 1 hosting a IP Address, Network Name, Physical Disk, and File Share resources

SAN

Node 1 Node 2

Windows Windows Server Server 20032003

Single ClusterSingle Cluster

IPIPNameNameDiskDisk

File ShareFile Share

Evict Node 2 from the Windows 2003 cluster

Perform clean install of Server 2008 on Node 2

Create an independent single node cluster with a new Cluster Name

SAN

Node 1 Node 2

LonghorLonghornn

20032003

Two separate ClustersTwo separate Clusters

IPIPNameNameDiskDisk

File ShareFile Share

Run the Cluster Migration Wizard on Node 2

Designate Node 2 as target and Node 1 as source

Perform a group by group copy of resources

Groups are created in an Offline state

SAN

Node 1 Node 2

ResourcesResourcesOnlineOnline

IPIPNameNameDiskDisk

File ShareFile Share

IPIPNameNameDiskDisk

File ShareFile ShareResourcesResources

OfflineOffline

Longhorn Cluster is pre-staged and ready for migration

Bring group Offline on Node 1

Bring group Online on Node 2

SAN

Node 1 Node 2

ResourcesResourcesOfflineOffline

IPIPNameNameDiskDisk

File ShareFile Share

IPIPNameNameDiskDisk

File ShareFile Share

ResourcesResourcesOnlineOnline

Install Server 2008 on Node 1

Join Node 1 to the existing cluster with Node 2

Resources can now be failed back and forth

Migration is complete!

SAN

Node 1 Node 2

IPIPNameNameDiskDisk

File ShareFile ShareResourcesResources

OnlineOnline

Single ClusterSingle Cluster

© 2007 Microsoft Corporation. All rights reserved.This presentation is for informational purposes only.MICROSOFT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, IN THIS SUMMARY.

High availability with server 2008Server 2008 Network Load BalancingSetting up server 2008 clusterServer 2008 failover cluster capabilitiesCluster 2008 quorum modelStretched clusterMigration to server 2008 Cluster