Sun Microsystems Netra 1290, Руководство администратора

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102 Netra 1290 Server System Administration Guide • May 2006
To relocate permanent memory, the operating system on a system must be
temporarily suspended, or quiesced. The length of the suspension depends on the
system configuration and the running workloads. Detaching a board with
permanent memory is the only time when the operating system is suspended;
therefore, you should know where permanent memory resides so that you can avoid
significantly impacting the operation of the system.
You can display the permanent memory by using the
cfgadm
(1M) command with
the
-v
option. When permanent memory is on the board, the operating system must
find another memory component of adequate size to receive the permanent memory.
If that is not possible the DR operation will fail.
Limitations
Memory Interleaving
System boards cannot be dynamically reconfigured if server memory is interleaved
across multiple CPU/memory boards.
Reconfiguring Permanent Memory
When a CPU/memory board containing nonrelocatable (permanent) memory is
dynamically reconfigured out of the server, a short pause in all domain activity is
required which may delay application response. Typically, this condition applies to
one CPU/memory board in the server. The memory on the board is identified by a
nonzero permanent memory size in the status display produced by the
cfgadm -av
command.
DR supports reconfiguration of permanent memory from one system board to
another only if one of the following conditions is met:
■
The target system board has the same amount of memory as the source system board.
■
The target system board has more memory than the source system board. In this
case,
the additional memory is added to the pool of available memory.