IBM I5, I5/OS I/O Subsystem

iSeries. mySeries.

Main Storage Concepts

Memory Allocation Facts

Power4 Hypervisor allocated memory equally from all nodes

This leads to more “remote” memory access

Power5 hypervisor tries to do better ...

Processors are assigned on the fewest nodes possible

Configured memory will be assigned keeping as much memory as possible on the same node

The HPT for the partition will be assigned on the same node

How becomes memory affinity with dynamic processor/memory moves ?

The system will “do its best” ...

But there is no guarantee that the best configuration can be maintained

A full system restart (hypervisor) may be needed to return system in its optimal configuration !

iSeries. mySeries.

Logical Partitions on the IBM Power5

Resources Management Concepts

I/O Subsystem

Contents

Main iSeries. mySeries. Logical Partitions on the IBM Power5 Introduction Logical Partitioning on the IBM Power5 Agenda iSeries. mySeries. Architecture The Service Processor The Service Processor (aka SP) The Power Hypervisor The Power Hypervisor Functions Starting an i5/OS partition Starting a LINUX or AIX partition Hypervisor will operates ... MHxxxxx Firmware PowerHypervisor Resources Management Concepts What is logical partitioning ? Resources Management Concepts Processor Concepts Dedicated Processors Page Page Potential Shared Processors Penalty Page Uncapped Processors Dedicated, Shared, Capped or Uncapped ? Simple Recommendations About Simultaneous Multi-Threading (SMT) Main Storage Page Recommendation Main Storage size MUST be carefully planned ! Remember !"#$ !"#$ I/O Subsystem I/O allocations are done at slot level A single slot can be allocated I/O structure must be understood for proper configuration ! Hierarchy of Microprocessors IOP-Less IOAs Virtual I/O Virtual I/O Facts What is dynamic What is not dynamic Changing the number of slots requires a partition deactivation and reactivation Virtual Serial Virtual Ethernet Virtual SCSI Virtual OptiConnect Page Page Page LPAR-Capable Server Models IBM eServer i5/520 Model i5/520 - 1000 CPW Model i5/520 - 2400 CPW Model i5/520 - 3300 CPW Model i5/520 - 6000 CPW IBM eServer i5/570 Model i5/570 - CoD from 3300 to 44700 CPW IBM eServer i5/595 Model i5/595 - CoD from 24500 to 165000 CPW Planning Think ... Requirements for i5/OS About Linux and AIX ... Requirements for Linux/AIX 5L v5.3 Requirements for AIX 5L v5.2 Know restrictions upstream position on the same bus ! ... Think ... ... Then act ! Hardware Management Console What is it ? Is it mandatory ? Appliance based on xSeries technology Connects to i5 and p5 servers Packaging Hardware Management Console Connecting HMC Ethernet Ports Medium Dependent Interface Crossover Private LAN Open LAN Auto-MDIX ports Simple HMC connection Cloning HMC configuration SP copies NVRAM configuration to the new HMC Redundant HMC configuration considerations But ... Private indirect networking PrivateLAN OpenLAN Private and open networking Page Server Management HMC Code Update Licensed Internal Code Updates HMC Users HMC Configuration Service Agent Configuration Remote Support Service Focal Point Page What is it ? Available on May 27th, 2005 (tomorrow) ! Planning for VPM ... Virtual Partition Manager vs. Hardware Management Console Page ibm.com/redbooks Frontcover ibm.com/redbooks Logical Partitions on the IBM PowerPChe IBM PowerPC A Guide to Working with LPAR on Power5 i5 Servers Frontcover AIX 5L on IBM eServer eServer i5: Implementation ation Guide ibm.com/redbooks Redpaper Virtual Partition Managerger A Guide to Planning lanning and Implementation IBM Eserver i5, iSeries, and AS/400e System Builder IBMi5/OS Version 5 Release 3 October2004 Thank You ! Contact Information