6.3
Table Of Contents
- Administrator Guide
- Contents
- About This Book
- Getting Started
- Introduction
- Configuring vCenter Server Heartbeat
- Server Configuration Wizard
- Configuring the Machine Identity
- Configuring the Server Role
- Configuring the Client Connection Port
- Configuring Channel Routing
- Configuring the Default Channel Port
- Configuring Low Bandwidth Module
- Configuring Public IP Addressing
- Configuring for Identical Nodes
- Configuring for Non-Identical Nodes
- Managing vCenter Server Heartbeat License Keys
- Configuring Message Queue Logs
- Configuring the Maximum Disk Usage
- System Administration and Management
- Server Protection
- Network Protection
- Application Protection
- Status and Control
- vCenter Server Heartbeat Console
- About vCenter Server Heartbeat Console
- Work with Groups and Pairs
- Add, Edit, Move, and Remove Pairs in VCenter Server Heartbeat Groups
- Review the Status of vCenter Server Heartbeat Groups and Pairs
- Exit vCenter Server Heartbeat Console
- Shut Down Windows Without Stopping vCenter Server Heartbeat
- Performance Protection
- Data Protection
- Data Protection Overview
- Other Administrative Tasks
- Troubleshooting
- Troubleshooting Unexpected Behaviors
- Two Active Servers
- Two Passive Servers
- Synchronization Failures
- Registry Status is Out of Sync
- Channel Drops
- Subnet or Routing Issues
- MaxDiskUsage Errors
- MaxDiskUsage Error Messages
- [L9]Exceeded the Maximum Disk Usage (VCChannelExceededMaxDiskUsageException)
- [L9]Exceeded the Maximum Disk Usage on the ACTIVE Server
- [L9]Exceeded the Maximum Disk Usage on the PASSIVE Server
- [L20]Out of Disk Space (VCChannelOutOfDiskSpaceException)
- Application Slowdown
- Poor Application Performance
- Both Servers Can Accommodate the Initial Load but the Load Has Increased
- One Server Can Provide Adequate Resource Support, but the Other Cannot
- Scheduled Resource Intensive Tasks
- Glossary
VMware, Inc. 17
Chapter 1 Introduction
Whendeployedwithidenticalnodes,thePrincipal(Public)NICsonthepassiveserverareconfiguredtouse
thesameIPaddressasthatoftheactiveserverbutarepreventedfromcommunicatingwiththelivenetwork
throughanIPpacketfilteringsysteminstalledwithvCenterServerHeartbeat.Thispacketfilterprevents
trafficusingthePrincipal(Public)addressfrombeingcommittedtothewire.ItalsopreventsNetBIOStraffic
utilizingotherIPaddressesontheNICfrombeingsenttopreventNetBIOSnameresolutionconflicts.
TheNICsontheactiveandpassiveserversusedfortheVMwareChannelareconfiguredsothattheir
IP
addressesareoutsideofthesubnetrangeofthePrincipal(Public)network.Theseaddressesare referredtoas
VMwareChanneladdresses.
Duringinstallation,setupwillswitchoffNetBIOSfortheVMwareChannel(s)ontheactiveandpassive
serversasthisconnectionremainsliveandboththepassiveandactivemachines
havethesameNetBIOS
name.FollowingrestoreandafterthevCenterServerHeartbeatinstallationcompletes(runtime),NetBIOSis
disabledacrossthechannel(s).Thisoccursduringinstallationtopreventanameconflict,whichoccurswhen
bothservershavethesamename.
TheNICsthatsupportconnectivityacrosstheVMwareChannelcanbe
standard100BaseTEthernetcards
providingathroughputof100MbitspersecondacrossstandardCat‐5cabling.Initsmostbasicform,a
dedicatedchannelrequiresnohubsorrouters,butthedirectconnectionrequirescrossovercabling.
WhenconfiguredforaWANdeployment,configuretheVMwareChanneltousestaticroutes
overswitches
androuterstomaintaincontinuouscommunicationsindependentfromcorporateorpublictraffic.
vCenter Server Heartbeat Switchover and Failover Processes
vCenterServerHeartbeatusesfourdifferentprocedures—managedswitchover,automaticswitchover,
automaticfailover,andmanagedfailover—tochangetheroleoftheactiveandpassiveserversdependingon
thestatusoftheactiveserver.
Managed Switchover
YoucanclickMakeActiveonthevCenterServerHeartbeatConsoleServer:Summarypagetomanually
initiateamanagedswitchover.Whenamanagedswitchoveristriggered,therunningofprotected
applicationsistransferredfromtheactivemachinetothepassivemachineintheserverpair.Theserverroles
arereversed.
Figure 1-5.
Switchover
Amanagedswitchoverperformsthefollowingsteps:
1Stoptheprotectedapplicationsontheactiveserver.Aftertheprotectedapplicationsstop,nomoredisk
updatesaregenerated.
2Sendallupdatesthatarestillqueuedontheactiveservertothepassiveserver.Afterthisstep,allupdates
areavailableonthepassive
server.