VCS Application Note: Sun Enterprise 10000 Dynamic Reconfiguration 7
Dynamic reconfiguration in VCS environment
Dynamic reconfiguration in VCS environment
The system board in a domain may contain I/O controllers, CPUs, or memory.
Typically, within a domain, system boards have their functions duplicated on
other system boards. For example, a board with CPU or memory can be removed
dynamically because another board has the equivalent functions.
Boards with I/O controllers can be dynamically reconfigured as long 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 variable is set
to zero (kernel cage disabled), preventing DR Detach operations.
Edit the file
/etc/system
so that
kernel_cage_enable
equals 1.
.
set kernel_cage_enable=1
.
Reboot the domain. To verify the kernel cage is enabled, check the file
/var/adm/messages
. Look for the message:
NOTICE: DR Kernel Cage is ENABLED
Detaching and attaching I/O system boards
In the configuration shown below, VCS runs on Domains A and B with service
groups online on Domain A. Shared storage consists of a VxVM disk group with
Summary of Contents for Veritas Solaris
Page 4: ......
