IBM P5 570 manual 5 N+1 redundancy, Fault masking, Resource deallocation

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(dynamic bit-steering). Memory scrubbing is the process of reading the contents of the memory during idle time and checking and correcting any single-bit errors that have accumulated by passing the data through the ECC logic. This function is a hardware function on the memory controller chip and does not influence normal system memory performance.

3.2.5 N+1 redundancy

The use of redundant parts allows the p5-570 to remain operational with full resources:

￿Redundant spare memory bits in L1, L2, L3, and main memory

￿Redundant fans

￿Redundant power supplies

3.2.6Fault masking

If corrections and retries succeed and do not exceed threshold limits, the system remains operational with full resources and no client or IBM customer engineer intervention is required:

￿CEC bus retry and recovery

￿PCI-X bus recovery

￿ECC Chipkill soft error

3.2.7Resource deallocation

If recoverable errors exceed threshold limits, resources can be deallocated with the system remaining operational, allowing deferred maintenance at a convenient time.

Dynamic or persistent deallocation

Dynamic deallocation of potentially failing components is non-disruptive, allowing the system to continue to run. Persistent deallocation occurs when a failed component is detected, which is then deactivated at a subsequent reboot.

Dynamic deallocation functions include:

￿Processor

￿L3 cache line delete

￿Partial L2 cache deallocation

￿PCI-X bus and slots

For dynamic processor deallocation, the service processor performs a predictive failure analysis based on any recoverable processor errors that have been recorded. If these transient errors exceed a defined threshold, the event is logged and the processor is deallocated from the system while the operating system continues to run. This feature (named CPU Guard) enables maintenance to be deferred until a suitable time. Processor deallocation can occur only if there are sufficient functional processors (at least two).

To verify whether CPU Guard has been enabled, run the following command:

lsattr -El sys0 grep cpuguard

If CPU Guard is enabled, the output will be similar to:

cpuguard

enable

CPU Guard

True

58p5-570 Technical Overview and Introduction

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Contents IBM Eserver p5 Technical Overview Introduction Page IBM Sserver p5 570 Technical Overview Introduction First Edition July Contents Page Page Vi p5-570 Technical Overview and Introduction Vii Trademarks Preface Team that wrote this RedpaperBecome a published author Comments welcomeGeneral description P5-570 Technical Overview and Introduction System specifications Physical packageMinimum and optional features View from the frontProcessor card features Processor card FC DescriptionMemory features Disk and media features5 I/O drawers USB diskette driveModel D10 I/O drawer Model D10 I/O drawer physical package Model D11 I/O drawer Model D20 I/O drawerDrawers and usable PCI slots Model D20 I/O drawer physical packageValue Paks Hardware Management Console modelsModel type conversion System racksIBM RS/6000 7014 Model T00 Enterprise Rack IBM RS/6000 7014 Model T42 Enterprise Rack AC Power Distribution Unit and rack contentRack-mounting rules for p5-570 and I/O drawers Additional options for rack Flat panel display optionsHardware Management Console 7310 Model CR2 OEM rackIBM 7212 Model 102 TotalStorage Storage device enclosure Statement of direction 18 p5-570 Technical Overview and Introduction Architecture and technical overview POWER5 chip POWER4 POWER5Simultaneous multi-threading Dynamic power managementEnhanced SMT features ST operationPower chip evolution POWER4Processor cards CMOS, copper, and SOI technologyProcessor drawer interconnect cables Processor card with DDR1 memory socket layout viewProcessor clock rate Pmcycles -mMemory subsystem Memory placement rulesMemory restriction Memory throughput System busesRIO-2 buses and GX+ card SP bus Internal I/O subsystemPCI-X slots and adapters Scsi adapters LAN adaptersGraphic accelerators Bit and 32-bit adaptersInternal storage Internal hot swappable Scsi disksInternal media devices Internal RAID optionsHot-swap disks and Linux 1 I/O drawers External I/O subsystems2 7311 Model D10 and 7311 Model D11 I/O drawers Model D11 features Model D10 features3 7311 Model D20 I/O drawer 4 7311 I/O drawer and RIO-2 cabling Model D20 internal Scsi cabling5 7311 I/O drawer and Spcn cabling Cost Optimized Performance OptimizedExternal disk subsystems IBM 2104 Expandable Storage PlusIBM TotalStorage FAStT Storage servers IBM 7133 Serial Disk Subsystem SSAIBM TotalStorage Enterprise Storage Server Virtualization Advanced Power Virtualization featureDynamic logical partitioning Virtual Ethernet15shows the POWER5 partitioning concept Micro-Partitioning technologyPOWER5 Partitioning Virtual I/O ServerService processor Partition Load ManagerService processor base Service processor extenderBoot process IPL flow without an HMC attached to the systemHardware Management Console IPL flow with an HMC attached to the systemManaged systems Definitions of partitionsProfiles Hardware requirements for partitioning System Management ServicesSpecific partition definitions used for Micro-Partitioning Boot options 17 System Management Services main menuAdditional boot options DVD-ROM, DVD-RAMSecurity Operating system requirementsAIX 5L Linux Linux supportCapacity on Demand, RAS, and manageability Way 1.9 GHz POWER5 processor card with DDR1 memory slots Processor Capacity Upgrade on Demand methodsWay 1.65 GHz POWER5 processor card Way 1.9 GHz POWER5 processor card with DDR2 memory slotsCapacity Upgrade on Demand for memory How to report temporary activation resources Capacity Upgrade on Demand for memory feature codesFault avoidance Reliability, availability, and serviceabilityTrial Capacity on Demand Permanent monitoring First Failure Data CaptureMutual surveillance Self-healing Memory reliability, fault tolerance, and integrityEnvironmental monitoring Resource deallocation Fault masking5 N+1 redundancy Dynamic or persistent deallocationServiceability Error indication and LED indicatorsManageability Concurrent MaintenanceAdvanced System Management Interface Service Agent Advanced System Management main menuService focal point Service Update Management Assistant3 p5 Customer-Managed Microcode Cluster CSM value points CSM V1.4 on AIX and Linux planned 4Q04IBM Redbooks Other publicationsOnline resources How to get IBM Redbooks Help from IBM68 p5-570 Technical Overview and Introduction Page IBM Eserver p5 Technical Overview Introduction

P5 570 specifications

The IBM P5 570 is a high-performance server that was designed for enterprise-scale computing, offering a blend of advanced technologies and a flexible architecture. Launched as part of IBM's Power5 server line, the P5 570 stands out for its robust processing capabilities and extensive scalability, making it a preferred choice for businesses requiring reliable and efficient computing solutions.

At the heart of the P5 570 is the IBM Power5 processor, which employs simultaneous multi-threading (SMT) technology. This allows the processor to handle two threads per core, effectively doubling the throughput for workloads ideally suited to multi-threading. The server typically features a configuration of up to 32 Power5 processors, providing an impressive compute power that supports demanding applications, ranging from databases to complex enterprise resource planning (ERP) systems.

The P5 570 architecture supports a wide range of memory configurations, with a maximum memory capacity of up to 512 GB. Utilizing IBM’s proprietary Chip Memory technology, it can deliver high bandwidth and low latency, significantly enhancing performance for memory-intensive applications. Furthermore, the integrated memory controller architecture optimizes memory access, ensuring that critical workloads run smoothly.

Scalability is a key characteristic of the P5 570, with the ability to expand processing power and memory capacity as an organization’s needs grow. The server supports various operating systems, including AIX, Linux, and IBM i, which provides flexibility for diverse IT environments. This versatility ensures that companies can run their preferred applications without the need for substantial system overhauls.

In terms of storage, the P5 570 utilizes advanced RAID technology and supports a variety of disk configurations, ensuring that data integrity and availability are maintained. Coupled with built-in security features, such as the IBM Trusted Foundation, which establishes a secure boot environment, the P5 570 offers a reliable platform for mission-critical workloads.

Finally, the IBM P5 570 is designed for high availability and redundancy. Features like hot-swappable components and advanced error detection and recovery mechanisms minimize downtime, making it a dependable choice for businesses that operate around the clock. Combined with its powerful hardware and versatile software support, the IBM P5 570 remains a formidable player in the high-performance server arena.
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