IBM Z10 BC manual Distance, Ficon Express enhancements for Storage Area Networks

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Extended distance FICON – improved performance at extended

distance

An enhancement to the industry standard FICON architec- ture (FC-SB-3) helps avoid degradation of performance at extended distances by implementing a new protocol for “persistent” Information Unit (IU) pacing. Control units that exploit the enhancement to the architecture can increase the pacing count (the number of IUs allowed to be in fl ight from channel to control unit). Extended distance FICON also allows the channel to “remember” the last pacing update for use on subsequent operations to help avoid degradation of performance at the start of each new operation.

Improved IU pacing can help to optimize the utilization of the link, for example help keep a 4 Gbps link fully utilized at 50 km, and allows channel extenders to work at any dis- tance, with performance results similar to that experienced when using emulation.

The requirements for channel extension equipment are simplifi ed with the increased number of commands in

flight. This may benefi t z/OS Global Mirror (Extended Remote Copy – XRC) applications as the channel exten- sion kit is no longer required to simulate specifi c channel commands. Simplifying the channel extension require- ments may help reduce the total cost of ownership of end- to-end solutions.

Extended distance FICON is transparent to operating sys- tems and applies to all the FICON Express2 and FICON Express4 features carrying native FICON traffi c (CHPID type FC). For exploitation, the control unit must support the new IU pacing protocol. The channel will default to cur- rent pacing values when operating with control units that cannot exploit extended distance FICON.

Exploitation of extended distance FICON is supported by IBM System Storage DS8000 series Licensed Machine Code (LMC) level 5.3.1xx.xx (bundle version 63.1.xx.xx), or later.

To support extended distance without performance degra- dation, the buffer credits in the FICON director must be set appropriately. The number of buffer credits required is dependent upon the link data rate (1 Gbps, 2 Gbps, or 4 Gbps), the maximum number of buffer credits supported by the FICON director or control unit, as well as application and workload characteristics. High bandwidth at extended distances is achievable only if enough buffer credits exist to support the link data rate.

FICON Express enhancements for Storage Area Networks

N_Port ID Virtualization

N_Port ID Virtualization is designed to allow for sharing of a single physical FCP channel among multiple operating system images. Virtualization function is currently available for ESCON and FICON channels, and is now available for FCP channels. This function offers improved FCP channel utilization due to fewer hardware requirements, and can reduce the complexity of physical FCP I/O connectivity.

Program Directed re-IPL

Program Directed re-IPL is designed to enable an operat- ing system to determine how and from where it had been loaded. Further, Program Directed re-IPL may then request that it be reloaded again from the same load device using the same load parameters. In this way, Program Directed re-IPL allows a program running natively in a partition to trigger a re-IPL. This re-IPL is supported for both SCSI and ECKD devices. z/VM 5.3 provides support for guest exploitation.

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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 Architecture Z10 BC 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 Model Z10 BC capacity identifiersMemory Dimm sizes 2 GB and 4 GB Z10 BC model upgrades Z10 BC Model Capacity IDsZ10 BC Performance Large System Performance ReferenceCPU Measurement Facility Z10 BC I/O Subsystem System I/O Configuration AnalyzerZ10 BC Channels and I/O Connectivity Concurrent Update Support of Spanned Channels and Logical PartitionsModes of Operation Ficon Support for Cascaded Directors FCP ChannelsFCP increased performance for small block sizes Scsi IPL now a base functionFCP Full fabric connectivity High Performance Ficon improvement in performancePreplanning and setup of SAN for a System z10 environment Platform and name server registration in Ficon channelDistance Ficon Express enhancements for Storage Area NetworksNPort ID Virtualization Program Directed re-IPLServiceability Enhancements Feature Infrastructure Ports perFicon Link Incident Reporting OSA-Express3 the newest family of LAN adaptersOSA-Express3 Ethernet features Summary of benefits OSA-Express2 availabilityFeatures Purpose/TrafficType OSA-Express3 10 Gigabit Ethernet LROSA-Express3-2P Gigabit Ethernet SX Four-port exploitation on OSA-Express3 GbE SX and LXOSA-Express3 1000BASE-T Ethernet 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/OSDirect Memory Access DMA Hardware data routerIBM Communication Controller for Linux CCL OSA-Express3 and OSA-Express2 OSN OSA for NCPOSA Integrated Console Controller Remove L2/L3 LPAR-to-LPAR RestrictionOSA/SF Virtual MAC and Vlan id Display Capability HiperSockets HiperSockets Enhancement for zIIP Exploitation Security Cryptography Can Do IT securelyCP Assist for Cryptographic Function Cpacf Enhancements to CP Assist for Cryptographic Func Tion Cpacf Configurable Crypto Express2Crypto Express2-1P Support for ISO Support for RSA keys up to 4096 bitsDynamically add crypto to a logical partition Secure Key AESSupport for 13- thru 19-digit Personal Account Numbers TKE 5.3 workstationEnhancement with TKE 5.3 LIC Smart Card ReaderTKE additional smart cards new feature System z10 BC cryptographic migrationRemote Loading of Initial ATM Keys 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 FocusEnhanced Driver Maintenance Availability FunctionsHardware System Area HSA Redundant I/O InterconnectDynamic Oscillator Switchover Concurrent Memory UpgradeService Enhancements Transparent SparingPower Monitoring Power Estimation ToolEnvironmental Enhancements IBM Systems Director Active Energy ManagerImproved service time with Coupling Facility Duplex Parallel Sysplex Cluster TechnologyCoupling 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 Z10 Coupling Link Options Time synchronization and time accuracy on z10 BCServer Time Protocol STP 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 automateHMC System Support Family Machine TypeInternet Protocol, Version 6 IPv6 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 Physical Characteristics Z10 BC System PowerZ10 BC Highlights and Physical Dimensions Z9 BC Physical PlanningZ10 BC Configuration Detail Z10 BC Concurrent PU ConversionsZ10 BC Model Structure Z10 BC Minimum MaximumIBF Z10 BC IBF hold uptime Drawer DrawersCoupling Facility CF Level of Support Z890Statement of Direction Publications Following Redbook publications are available nowAvailable in the Library section of Resource Link Resource LinkZSO03021-USEN-02
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