5486OpS.fm Draft Document for Review October 18, 2004
512 IBM Eserver i5 and iSeries System Handbook
format is a key requirement for developing mobile, heterogeneous on demand
business solutions.
Features
Java support includes these primary functions and capabilities:
An Object-Oriented Programming Language, developed at Sun Microsystems
A JVM that is integrated in the i5/OS and OS/400 operating system
A Java “static compilation” option, designed for improved performance, that
compiles Java into iSeries-dependent object code
Java's primary benefit is its ability to develop portable applications using the
Internet and intranets, whose “objects” can run on many different platforms in
the same network.
A Java Secure Sockets Layer (SSL) package that is included with i5/OS and
OS/400 to leverage the integrated SSL function built into the iSeries server
You can easily build more secure distributed applications using Java. All data
exchanged between the tiers on the multiple platforms can be encrypted
using the SSL protocol.
SQL embedded in the Java programming language at V5R1 and later
Supported SQL statements include SQL data-manipulation statements to
operate on data stored in tables in relational databases.
New processor resource functions with i5/OS V5R3
Dedicated processors
Partitions use processing resources. These processing resources cannot be
used by any other partition while the partition is active. However, with V5R3
on the Model 520 and 570, when the partition is shut down, its processors
become available by any partition using the uncapped sharing mode.
Shared and capped processors
Processors using the capped shared mode are assigned from the shared
processor pool. A partition using processors in this mode is guaranteed the
use of the total processor capacity assigned to it if the workload requires it.
This is similar to how shared processors are currently implemented.
Shared uncapped processors
Processors using the uncapped sharing mode are also assigned from the
shared pool. The partition is guaranteed the use of the total processor
capacity assigned to it if it needs it (such as shared capped). However, if the
workload requires it, the shared uncapped partition can acquire additional
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