IBM Z10 BC manual FCP increased performance for small block sizes, Scsi IPL now a base function

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FCP – increased performance for small block sizes

The Fibre Channel Protocol (FCP) Licensed Internal Code has been modifi ed to help provide increased I/O operations per second for small block sizes. With FICON Express4, there may be up to 57,000 I/O operations per second (all reads, all writes, or a mix of reads and writes), an 80% increase compared to System z9. These results are achieved in a laboratory environment using one channel confi gured as CHPID type FCP with no other processing occurring and do not represent actual fi eld measurements. A signifi cant increase in I/O operations per second for small block sizes can also be expected with FICON Express2.

This FCP performance improvement is transparent to oper- ating systems that support FCP, and applies to all the FICON Express4 and FICON Express2 features when con-

figured as CHPID type FCP, communicating with SCSI devices.

SCSI IPL now a base function

The SCSI Initial Program Load (IPL) enablement feature,

first introduced on z990 in October of 2003, is no longer required. The function is now delivered as a part of the server Licensed Internal Code. SCSI IPL allows an IPL of an operating system from an FCP-attached SCSI disk.

FCP Full fabric connectivity

FCP full fabric support means that any number of (single vendor) FCP directors/ switches can be placed between the server and an FCP/SCSI device, thereby allowing many “hops” through a Storage Area Network (SAN) for I/O connectivity. FCP full fabric connectivity enables mul- tiple FCP switches/directors on a fabric to share links and therefore provides improved utilization of inter-site con- nected resources and infrastructure.

FICON and FCP for connectivity to disk, tape, and printers

High Performance FICON – improvement in performance and

RAS

Enhancements have been made to the z/Architecture and the FICON interface architecture to deliver optimiza- tions for online transaction processing (OLTP) workloads. When exploited by the FICON channel, the z/OS operating system, and the control unit, High Performance FICON for System z (zHPF) is designed to help reduce overhead and improve performance.

Additionally, the changes to the architectures offer end- to-end system enhancements to improve reliability, avail- ability, and serviceability (RAS).

zHPF channel programs can be exploited by the OLTP I/O workloads – DB2, VSAM, PDSE, and zFS – which transfer small blocks of fi xed size data (4K blocks). zHPF implementation by the DS8000 is exclusively for I/Os that transfer less than a single track of data.

The maximum number of I/Os is designed to be improved up to 100% for small data transfers that can exploit zHPF. Realistic production workloads with a mix of data transfer sizes can see up to 30 to 70% of FICON I/Os utilizing zHPF resulting in up to a 10 to 30% savings in channel utilization. Sequential I/Os transferring less than a single track size (for example, 12x4k bytes/IO) may also benefi t.

The FICON Express4 and FICON Express2 features will support both the existing FICON protocol and the zHPF protocol concurrently in the server Licensed Internal Code. High performance FICON is supported by z/OS for DB2, VSAM, PDSE, and zFS applications. zHPF applies to all FICON Express4 and FICON Express2 features (CHPID type FC) and is exclusive to System z10. Exploitation is required by the control unit.

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Contents IBM System z10 Business Class z10 BC Reference Guide Table of Contents IBM System z10 Business Class z10 BC Overview Think Big, Virtually LimitlessMore Solutions, More Affordable Special workloads, Specialty engines, affordable technologyNew Face Of System z Z10 BC Architecture ArchitectureArchitecture operating system support Page Commitment to system integrity VSE TPFLinux on System z Operating System ESA/390Z10 BC Page Page Z10 BC Design and Technology Z10 BC capacity identifiers Z10 BC ModelMemory Dimm sizes 2 GB and 4 GB Z10 BC model upgrades Z10 BC Model Capacity IDsLarge System Performance Reference Z10 BC PerformanceCPU Measurement Facility Z10 BC I/O Subsystem System I/O Configuration AnalyzerZ10 BC Channels and I/O Connectivity Support of Spanned Channels and Logical Partitions Concurrent UpdateModes of Operation Ficon Support for Cascaded Directors FCP ChannelsFCP Full fabric connectivity FCP increased performance for small block sizesScsi IPL now a base function High Performance Ficon improvement in performancePreplanning and setup of SAN for a System z10 environment Platform and name server registration in Ficon channelNPort ID Virtualization DistanceFicon Express enhancements for Storage Area Networks Program Directed re-IPLFicon Link Incident Reporting Serviceability EnhancementsFeature Infrastructure Ports per OSA-Express3 the newest family of LAN adaptersOSA-Express3 Ethernet features Summary of benefits OSA-Express2 availabilityType FeaturesPurpose/Traffic OSA-Express3 10 Gigabit Ethernet LROSA-Express3 1000BASE-T Ethernet OSA-Express3-2P Gigabit Ethernet SXFour-port exploitation on OSA-Express3 GbE SX and LX OSA-Express3-2P 1000BASE-T EthernetNetwork Traffic Analyzer Link aggregation for z/VM in Layer 2 mode Dynamic LAN idle for z/OSLayer 2 transport mode When would it be used? OSA Layer 3 Virtual MAC for z/OSIBM Communication Controller for Linux CCL Direct Memory Access DMAHardware data router OSA-Express3 and OSA-Express2 OSN OSA for NCPRemove L2/L3 LPAR-to-LPAR Restriction OSA Integrated Console ControllerOSA/SF Virtual MAC and Vlan id Display Capability HiperSockets HiperSockets Enhancement for zIIP Exploitation Can Do IT securely Security CryptographyCP Assist for Cryptographic Function Cpacf Configurable Crypto Express2 Enhancements to CP Assist for Cryptographic Func Tion CpacfCrypto Express2-1P Dynamically add crypto to a logical partition Support for ISOSupport for RSA keys up to 4096 bits Secure Key AESEnhancement with TKE 5.3 LIC Support for 13- thru 19-digit Personal Account NumbersTKE 5.3 workstation Smart Card ReaderRemote Loading of Initial ATM Keys TKE additional smart cards new featureSystem z10 BC cryptographic migration Remote Key Loading BenefitsOn Demand Capabilities Capacity on Demand Temporary CapacityAmendment for CBU Tests Capacity Provisioning OS Capacity provisioning allows you to set up rules System z9 System z10Reliability, Availability, and Serviceability RAS RAS Design FocusHardware System Area HSA Enhanced Driver MaintenanceAvailability Functions Redundant I/O InterconnectService Enhancements Dynamic Oscillator SwitchoverConcurrent Memory Upgrade Transparent SparingEnvironmental Enhancements Power MonitoringPower Estimation Tool IBM Systems Director Active Energy ManagerParallel Sysplex Cluster Technology Improved service time with Coupling Facility DuplexCoupling Facility Control Code Cfcc Level Coupling Facility Configuration Alternatives System-Managed CF Structure DuplexingParallel Sysplex Coupling Connectivity Introducing long reach InfiniBand coupling linksCoupling Connectivity for Parallel Sysplex Server Time Protocol STP Z10 Coupling Link OptionsTime synchronization and time accuracy on z10 BC Server Time Protocol enhancementsPreview Improved STP System Management with Enhanced STP recovery when Internal Battery Feature Continuous Availability of NTP servers used as ExterInternal Battery Feature Recommendation Application Programming Interface API to automateInternet Protocol, Version 6 IPv6 HMC System SupportFamily Machine Type HMC/SE Console MessengerEnhanced installation support for z/VM using the HMC HMC z/VM Tower System Management EnhancementsImplementation Services for Parallel Sysplex Fiber Quick Connect for Ficon LX Environments GdpsZ10 BC Highlights and Physical Dimensions Z9 BC Z10 BC Physical CharacteristicsZ10 BC System Power Physical PlanningZ10 BC Configuration Detail Z10 BC Concurrent PU ConversionsIBF Z10 BC Model StructureZ10 BC Minimum Maximum Z10 BC IBF hold uptime Drawer DrawersCoupling Facility CF Level of Support Z890Statement of Direction Available in the Library section of Resource Link PublicationsFollowing Redbook publications are available now Resource LinkZSO03021-USEN-02
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