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March 2005

N16815F

VERITAS Cluster Server

Application Note: Sun Enterprise 10000

Dynamic Reconfiguration

Solaris

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Summary of Contents for Sun Enterprise 10000

Page 1: ...March 2005 N16815F VERITAS Cluster Server Application Note Sun Enterprise 10000 Dynamic Reconfiguration Solaris ...

Page 2: ...idental or consequential damages in connection with the furnishing performance or use of this manual VERITAS Legal Notice Copyright 2003 2005 VERITAS Software Corporation All rights reserved VERITAS the VERITAS Logo and all other VERITAS product names and slogans are trademarks or registered trademarks of VERITAS Software Corporation VERITAS the VERITAS logo Reg U S Pat Tm Off Other product names ...

Page 3: ...configure it into the domain Note Currently VCS does not support using DR in clusters where I O controllers and storage use Sun s Alternate Pathing AP In a VCS cluster of domains it s possible that the DR operations in a domain might cause VCS to detect that resources are not available and to initiate failover to the other domain Therefore it is advisable to freeze the service groups running in th...

Page 4: ... as you use VxVM with the Dynamic Multipathing DMP feature to manage the shared storage Setting Environment Variable to Enable DR Before performing DR operations on a domain you must first set the appropriate environment variable Enable the Kernel Cage Variable for DR Using the Solaris 8 operating environment you must set the system 4 variable kernel_cage_enable to 1 enabled By default this variab...

Page 5: ...The administrator disables the controller and the disk controller on SB1 automatically takes over because of the DMP functionality Using DR commands the administrator can detach or remove the board from the Domain A s configuration When this is complete the board can be physically removed Replacing the board a controller board in this case involves physically installing it and reconnecting it to t...

Page 6: ...es Dynamic Reconfiguration DR ssp D1 echo SUNW_HOSTNAME 3 Enter the dr 1M shell ssp D1 dr 4 To verify the board is an I O board enter dr drshow sb IO If the display lists the disks connected to the controller the system board is an I O board 5 If the system board is an I O board open another window and log in as root to the domain you are currently reconfiguring 6 Disable the controller on the I O...

Page 7: ...e VCS service groups running on the domain where you intend to attach a system board Repeat the following command for each service group hagrp freeze ser_grp_name 2 After physically replacing a previously removed I O board make sure it is connected to the shared storage 3 From the SSP server enter the dr 1M shell ssp D1 dr 4 Follow the Sun procedure to attach the system board described here briefl...

Page 8: ...he kernel_cage_enable variable is set 1 Freeze the VCS service groups running on the domain where you intend to detach a CPU Memory board Freezing the service groups prevents them from being taken offline or failed over Repeat the following command for each service group hagrp freeze ser_grp_name 2 Connect to the SSP server and log in to the domain whose system board requires Dynamic Reconfigurati...

Page 9: ... used if none of the I O devices on the system board are used 1 Freeze the VCS service groups running on the domain where you intend to attach a system board Repeat the following command for each service group hagrp freeze ser_grp_name 2 Physically replace the CPU Memory board 3 From the SSP server enter the dr 1M shell ssp D1 dr 4 Follow the Sun procedure to attach the system board described here...

Page 10: ...nager DMP feature disabled for some or all of the disks in the shared storage and you must perform DR operations within the cluster we recommend using the VCS DiskReservation agent to guard against data corruption In the event of a split brain condition that is when two processors in a cluster can simultaneously write to the shared storage the DiskReservation agent ensures that only one processor ...

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