i5/OS and OS/400 (5722-SS1): Architecture 513
Draft Document for Review October 18, 2004 5486OpS.fm
processing capacity. This additional processor capacity can be taken from the
shared processor pool from which that partition is using resources.
A processor using uncapped mode can always use its assigned capacity.
Partitions using uncapped processors can
weigh the importance of a partition
to give importance to one uncapped partition over another.
You can find more information about, and a demonstration for, uncapped
processors in the Capacity on Demand section in the iSeries Information
Center at:
http://publib.boulder.ibm.com/infocenter/eserver/v1r2s/en_US/
index.htm?info/iphat/iphatsharedproc.htm
Memory
Memory used by the POWER5 technology-based processors is moved in
blocks known as a
logical memory block (LMB). Also known as a memory
region, a LMB is the smallest memory unit managed by the POWER5
processors. The LMB size on Models 520,550,570 and 595 is 16 MB. The
LMB size on Models 800, 810, 825, 870, and 890 is 1 MB. Dynamic memory
movement between logical partitions is on LMB boundaries (1 MB or 16 MB
depending on the model).
i5/OS and OS/400 base functions
i5/OS and OS/400 are 64-bit operating system that runs on all models of the
iSeries server. i5/OS and OS/400 with its base function provides ease of
implementation, management, and operation in one totally integrated
object-oriented operating system. The integrated features are:
Advanced GUI support to provide for:
– Easy setup and management of the system, including the TCP/IP function
– Database functions
– User and printer job administration
– System management
– Software distribution
– Performance monitoring
– Centralized management of multiple systems
– Plug-in support for Domino, Backup Recovery and Media Services
(BRMS), and others
Network computing
IFS with industry standards
Multiple operating environments and LPARs
– Different versions and releases of i5/OS and OS/400
–Linux
–AIX 5L
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