Hitachi Compute Blade 2000 User Manual page 1075

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Memory allocation

LPAR manager firmware version 59-2X/79-2X or later supports the following two types

of memory allocation; the automatic memory allocation and the memory allocation by

specified node. The former considers the node of the physical processor automatically,

and the latter allocates the physical memory in one node, which is specified manually by

the user. These operations are as follows:

Description of the memory allocation

When the activating LPAR is in Dedicated mode, LPAR

manager assigns the memory in the node to which the

assigned processor belongs to.

When the activating LPAR is in Shared mode and the

processor group is configured, the LPAR manager assigns

the memory in the node of the processor group in which the

LPAR is included.

When the activating LPAR is in Shared mode and the

processor group is not configured, LPAR manager assigns

the memory in any node.

LPAR manager allocates preferentially the LPAR to the free

physical memory that belongs in the same node with the

assigned physical processor to the LPAR.

When the free physical memory in the same node does not

reach the requirement, the LPAR manager allocates the

shortage from the other node.

* When the total amount of free memory in all nodes does

not satisfy the requirement, LPAR activation will fail.

LPAR manager allocates the LPAR the free physical memory

in the node specified by the user.

* When the free physical memory in the specified node does

not satisfy the requirement, LPAR manager does not

search the other node and LPAR activation will fail.

The physical processor that is assigned to the LPAR can be changed dynamically by

the "scheduling mode dynamic change function".

However, the physical memory which is allocated to the LPAR is determined in the

LPAR activation, and it cannot be changed after activation.

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