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  9. 10.4.1 Understanding the Mechanism of the Host Watchdog Function/Alive Check

Contents

  1. Preface
  2. Chapter 1 Understanding an Overview of the SPARC M12/M10
    1.  1.1 Basics of the SPARC M12/M10
    2. Click 1.2 Basics of the XSCF Firmware
    3. Click 1.3 Network Configuration
    4.  1.4 Basics of Hypervisor
    5.  1.5 Basics of Oracle VM Server for SPARC
    6.  1.6 Basics of OpenBoot PROM
  3. Chapter 2 Logging In/Out of the XSCF
    1. Click 2.1 Connecting the System Management Terminal
    2. Click 2.2 Logging In to the XSCF Shell
    3.  2.3 Logging Out from the XSCF Shell
    4. Click 2.4 Logging In to XSCF Web
    5.  2.5 Logging Out From XSCF Web
    6.  2.6 Number of Connectable Users
  4. Chapter 3 Configuring the System
    1. Click 3.1 Preliminary Work for XSCF Setup
    2. Click 3.2 Understanding the Contents of the XSCF Firmware Settings
    3.  3.3 Setting Up From the XSCF Shell
    4.  3.4 Setting Up From XSCF Web
    5. Click 3.5 Creating/Managing XSCF Users
    6. Click 3.6 Setting the XSCF Time/Date
    7. Click 3.7 Configuring the SSH/Telnet Service for Login to the XSCF
    8. Click 3.8 Configuring the HTTPS Service for Login to the XSCF
    9. Click 3.9 Configuring the XSCF Network
    10. Click 3.10 Configuring Auditing to Strengthen XSCF Security
  5. Chapter 4 Configuring the System to Suit the Usage Type
    1. Click 4.1 Setting/Checking the System Altitude
    2. Click 4.2 Controlling System Start
    3. Click 4.3 Enabling/Disabling Dual Power Feed
    4. Click 4.4 Reducing Power Consumption
    5. Click 4.5 Connecting a DVD Drive
    6. Click 4.6 Using Remote Storage
  6. Chapter 5 CPU Activation
    1.  5.1 Basic Concepts of CPU Activation
    2.  5.2 CPU Activation Key
    3. Click 5.3 Adding CPU Core Resources
    4. Click 5.4 Deleting CPU Core Resources
    5. Click 5.5 Moving CPU Core Resources
    6. Click 5.6 Displaying CPU Activation Information
    7. Click 5.7 Saving/Restoring CPU Activation Keys
    8. Click 5.8 Troubleshooting CPU Activation Errors
    9.  5.9 Important Notes about CPU Activation
  7. Chapter 6 Starting/Stopping the System
    1. Click 6.1 Starting the System
    2. Click 6.2 Stopping the System
    3.  6.3 Rebooting the System
    4.  6.4 Suppressing Starting Oracle Solaris at Power-on
  8. Chapter 7 Controlling Physical Partitions
    1.  7.1 Configuring a Physical Partition
    2. Click 7.2 Setting the Physical Partition Operation Mode
    3.  7.3 Powering On a Physical Partition
    4.  7.4 Powering Off a Physical Partition
    5.  7.5 Changing the Configuration of a Physical Partition
  9. Chapter 8 Controlling Logical Domains
    1.  8.1 Configuring a Logical Domain
    2. Click 8.2 Configuring the Oracle Solaris Kernel Zone
    3. Click 8.3 Switching to the Control Domain Console From the XSCF Shell
    4. Click 8.4 Returning to the XSCF Shell From the Control Domain Console
    5.  8.5 Starting a Logical Domain
    6.  8.6 Shutting Down a Logical Domain
    7. Click 8.7 Ordered Shutdown of Logical Domains
    8.  8.8 Checking CPU Activation Information
    9. Click 8.9 Setting the OpenBoot PROM Environment Variables of the Control Domain
    10. Click 8.10 Domain Console Logging Function
    11.  8.11 Changing the Configuration of a Logical Domain
    12.  8.12 Setting the Logical Domain Time
    13. Click 8.13 Collecting a Hypervisor Dump File
    14. Click 8.14 Managing Logical Domain Resources Associated with CPU Sockets
    15. Click 8.15 Setting the Physical Partition Dynamic Reconfiguration Policy
    16. Click 8.16 Setting the Maximum Page Size of a Logical Domain
  10. Chapter 9 Managing the Systems Daily
  11. Chapter 10 Preparing/Taking Action for Failures
    1.  10.1 Learning about Troubleshooting and Related Functions
    2. Click 10.2 Receiving Notification by E-mail When a Failure Occurs
    3. Click 10.3 Monitoring/Managing the System Status With the SNMP Agent
    4. Click 10.4 Monitoring the System
    5.  10.5 Understanding the Failure Degradation Mechanism
    6. Click 10.6 Checking Failed Hardware Resources
    7. Click 10.7 Setting Automatic Replacement of Failed CPU Cores
    8.  10.8 Setting Recovery Mode
    9.  10.9 Setting Up a Redundant Component Configuration
    10. Click 10.10 Saving/Restoring XSCF Settings Information
    11. Click 10.11 Saving/Restoring Logical Domain Configuration Information in the XSCF
    12. Click 10.12 Saving/Restoring Logical Domain Configuration Information in an XML File
    13. Click 10.13 Saving/Restoring the OpenBoot PROM Environment Variables
    14.  10.14 Saving/Restoring the Contents of a Hard Disk
    15.  10.15 Resetting a Logical Domain
    16. Click 10.16 Causing a Panic in a Logical Domain
    17.  10.17 Resetting a Physical Partition
    18. Click 10.18 Returning the Server to the State at Factory Shipment
    19.  10.19 Collecting a Crash Dump File Using Deferred Dump
  12. Chapter 11 Checking the System Status
    1. Click 11.1 Checking the System Configuration/Status
    2. Click 11.2 Checking a Physical Partition
  13. Chapter 12 Checking Logs and Messages
    1. Click 12.1 Checking a Log Saved by the XSCF
    2. Click 12.2 Checking Warning and Notification Messages
  14. Chapter 13 Switching to Locked Mode/Service Mode
    1.  13.1 Understanding the Differences Between Locked Mode and Service Mode
    2.  13.2 Switching the Operating Mode
  15. Chapter 14 Configuring a Highly Reliable System
    1. Click 14.1 Configuring Memory Mirroring
    2. Click 14.2 Configuring Hardware RAID
    3.  14.3 Using the LDAP Service
    4.  14.4 Using SAN Boot
    5.  14.5 Using iSCSI
    6. Click 14.6 Remote Power Management for the SPARC M12/M10 and I/O Devices
    7.  14.7 Using an Uninterruptible Power Supply
    8. Click 14.8 Using Verified Boot
  16. Chapter 15 Expanding the System Configuration
    1.  15.1 Changing the Virtual CPU Configuration
    2.  15.2 Changing the Memory Configuration
    3. Click 15.3 Dynamic Reconfiguration Function for PCIe Endpoint Devices
    4. Click 15.4 Using the PCI Expansion Unit
    5.  15.5 Expanding the SPARC M12-2S/M10-4S
  17. Chapter 16 Updating the XCP Firmware
    1. Click 16.1 Basics of Firmware Update
    2. Click 16.2 Before Updating Firmware
    3.  16.3 Update Flow
    4.  16.4 Preparing an XCP Image File
    5. Click 16.5 Updating Firmware
    6.  16.6 Updating Firmware From XSCF Web
    7. Click 16.7 Firmware Version Matching with Parts Addition/Replacement
    8.  16.8 Trouble During Firmware Update
    9.  16.9 FAQ Relating to Firmware Update
  18. Chapter 17 Updating Oracle Solaris and Oracle VM Server for SPARC
  19. Chapter 18 Troubleshooting
    1.  18.1 Troubleshooting for the XSCF
    2.  18.2 Precautions Concerning Using the RESET Switch
    3.  18.3 Frequently Asked Questions / FAQ
    4.  18.4 System Troubleshooting With the XSCF
  20. Appendix A Lists of SPARC M12/M10 System Device Paths
    1.  A.1 SPARC M12-1 Device Paths
    2. Click A.2 SPARC M12-2 Device Paths
    3. Click A.3 SPARC M12-2S Device Paths
    4.  A.4 SPARC M10-1 Device Paths
    5. Click A.5 SPARC M10-4 Device Paths
    6. Click A.6 SPARC M10-4S Device Paths
  21. Appendix B Identifying an SAS2 Device Based on a WWN
    1.  B.1 World Wide Name (WWN) Syntax
    2.  B.2 Overview of probe-scsi-all Command Output
    3. Click B.3 Identifying a Disk Slot by Using the probe-scsi-all Command
    4. Click B.4 Identifying Disk Slot
  22. Appendix C List of the XSCF Web Pages
    1.  C.1 Overview of the Pages
    2.  C.2 Understanding the Menu Configuration
    3. Click C.3 Available Pages
  23. Appendix D XSCF MIB Information
    1.  D.1 MIB Object Identification
    2.  D.2 Standard MIB
    3. Click D.3 Extended MIB
    4.  D.4 Traps
  24. Appendix E SPARC M12/M10 System-specific Functions of Oracle VM Server for SPARC
    1.  E.1 Ordered Shutdown of Logical Domains
    2.  E.2 CPU Activation Support
    3. Click E.3 Checking Failed Resources
    4.  E.4 Automatic Replacement of Failed CPUs
    5.  E.5 Hypervisor Dump
    6.  E.6 Domain Console Logging Function
    7.  E.7 CPU Socket Restrictions
  25. Appendix F SAS2IRCU Utility Command Examples
    1.  F.1 Displaying a List of SAS Controllers Recognized by sas2ircu
    2.  F.2 Displaying the Information of a Hardware RAID Volume
    3.  F.3 Adding a Hardware RAID Volume
    4.  F.4 Displaying the Configuration Status of a Hardware RAID Volume
    5.  F.5 Creating a Hot Spare of a Hardware RAID Volume
    6.  F.6 Deleting a Hot Spare of a Hardware RAID Volume
    7.  F.7 Deleting a Hardware RAID Volume
    8.  F.8 Identifying the Faulty Disk Drive of a Hardware RAID Volume
  26. Appendix G SPARC M12-1/M10-1 XSCF Startup Mode Function
    1. Click G.1 Function Overview
    2. Click G.2 Restrictions and Notes
    3.  G.3 Configuration Procedure
  27. Appendix H OpenBoot PROM Environment Variables and Commands
    1.  H.1 SCSI Device Display
    2.  H.2 Unsupported OpenBoot PROM Environment Variables
    3.  H.3 Unsupported OpenBoot PROM Commands
    4.  H.4 Behavior With the Security Mode Enabled
  28. Appendix I How to Specify the Boot Device
    1.  I.1 Device Path of the Internal Storage
    2.  I.2 Method of Specification With a PHY Number
    3.  I.3 Method of Specification With a Target ID
    4.  I.4 Method of Specification With an SAS Address
    5.  I.5 Method of Specification With a Volume Device Name
    6.  I.6 Notes About the Device Alias net of the SPARC M12 Without On-Board LAN
  29. Appendix J Lists of DVD Drive Aliases
    1. Click J.1 External DVD Drive Aliases
    2. Click J.2 Remote Storage DVD Drive Aliases
  30. Appendix K CPU Activation Interim Permit
    1.  K.1 What is the CPU Activation Interim Permit?
    2.  K.2 Terms of Use of the CPU Activation Interim Permit and Precautions
    3. Click K.3 Related Commands
    4. Click K.4 Flows and Procedures for Using a CPU Activation Interim Permit
    5. Click K.5 Event Notification of the CPU Activation Interim Permit
    6. Click K.6 Other Important Notes

10.4.1 Understanding the Mechanism of the Host Watchdog Function/Alive Check


10.4.1 Understanding the Mechanism of the Host Watchdog Function/Alive Check
An Oracle Solaris logical domain, OpenBoot PROM, Hypervisor, POST, and the XSCF communicate with one another and mutually monitor the alive status. Upon detection of any failure, a panic is generated or they are individually stopped to prevent the effect of the failure from spreading.

In these systems, Hypervisor monitors the logical domain/OpenBoot PROM, and the XSCF monitors POST.

The mechanism of monitoring between Hypervisor and the logical domain and between Hypervisor and OpenBoot PROM is called the Host watchdog function. Also the mechanism of monitoring between XSCF and POST is called the Alive check function.
Figure 10-4 shows the respective resources monitoring one another.
Figure 10-4  System Monitoring Feature
Figure 10-4 System Monitoring Feature
Note - OBP in Figure 10-4 stands for OpenBoot PROM.
XSCF monitors POST and judges as a failure when there is no response after a specific elapsed time, and then resets the physical partition or turns off the power.

Hypervisor regularly monitors the operation status of logical domains (Oracle Solaris/OpenBoot PROM) to detect any Oracle Solaris hang-up. Upon detecting an Oracle Solaris hang-up, Hypervisor generates an Oracle Solaris panic in the relevant domain.
Note - For support information on the Alive check function between the XSCF and Hypervisor, which is set up by the setpparmode command, see the latest Product Notes for your server.

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