5486wrkperf.fm Draft Document for Review October 18, 2004
44 IBM Eserver i5 and iSeries System Handbook
When a device has multiple addresses defined for multiple sessions to
support jump screen or an attached printer, each session counts toward the
maximum active addresses supported by that workstation controller.
When a device has a
single address defined with shared sessions, that device
counts as one of the maximum active addresses. There can be up to four
shared sessions on a single device.
There is a maximum of 300 shared sessions per I/O processor (IOP).
Refer to Technote Twinaxial Attached Device Throughput for Twinaxial Devices,
TIPS0358, to determine the types of sessions that count toward the maximum. It
also discusses the 5250 Express Data Stream capabilities relative to twinaxial
workstation adapters.
Communication WAN restrictions
Communication restrictions for Peripheral Component Interconnect (PCI)
systems are defined in the “LAN/WAN adapters” section of the model chapters in
the IBM Eserver iSeries and AS/400e System Builder, SG24-2155. You can find
rules for individual communication cards (adapters or IOPs) and sizing rules in
the specific adapter or IOP feature description within each model chapter of the
System Builder.
You can also find placement information in the Eserver Hardware Information
Center to install an adapter. Start at this website:
http://publib.boulder.ibm.com/infocenter/eserver/v1r2s/en_US/index.htm?info/iph
ak/howtodecide.htm
For general communications performance considerations, refer to the online
document iSeries Performance Capabilities Reference, SC41-0607.
iSeries server structure and terminology
The IBM Eserver i5 520, 550, 550, 570, and 595 servers, and the iSeries 810,
825, 870, and 890 servers, include a Processor feature and an Edition feature:
Processor feature: Feature code by which the
processor is ordered
Edition feature: Feature code by which the
package of features is ordered
Server feature: Feature code by which the processor
configuration is
ordered
IBM Eserver i5 and iSeries models offer two CPW ratings:
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