2014年3月12日 星期三
Using the CICS Explorer to monitor tasks
The CICS Explorer can very easily be used as a periscope to see what is going on in your CICS Syste, detail refer to this link.
2014年3月8日 星期六
2014年2月20日 星期四
Setsockopt
1.closesocket（一般不會立即關閉而經歷TIME_WAIT的過程）後想繼續重用該socket：
BOOL bReuseaddr=TRUE;
setsockopt(s,SOL_SOCKET ,SO_REUSEADDR,(const char*)&bReuseaddr,sizeof(BOOL));
2. 如果要已經處於連接狀態的soket在調用closesocket後強制關閉，不經歷
TIME_WAIT的過程：
BOOL bDontLinger = FALSE;
setsockopt(s,SOL_SOCKET,SO_DONTLINGER,(const char*)&bDontLinger,sizeof(BOOL));
3.在send(),recv()過程中有時由於網絡狀況等原因，發收不能預期進行,而設置收發時限：
int nNetTimeout=1000;//1秒
//發送時限
setsockopt(socket，SOL_S0CKET,SO_SNDTIMEO，(char *)&nNetTimeout,sizeof(int));
//接收時限
setsockopt(socket，SOL_S0CKET,SO_RCVTIMEO，(char *)&nNetTimeout,sizeof(int));
4.在send()的時候，返回的是實際發送出去的字節(同步)或發送到socket緩衝區的字節
(異步);系統默認的狀態發送和接收一次為8688字節(約為8.5K)；在實際的過程中發送數據
和接收數據量比較大，可以設置socket緩衝區，而避免了send(),recv()不斷的循環收發：
// 接收緩衝區
int nRecvBuf=32*1024;//設置為32K
setsockopt(s,SOL_SOCKET,SO_RCVBUF,(const char*)&nRecvBuf,sizeof(int));
//發送緩衝區
int nSendBuf=32*1024;//設置為32K
setsockopt(s,SOL_SOCKET,SO_SNDBUF,(const char*)&nSendBuf,sizeof(int));
5. 如果在發送數據的時，希望不經歷由系統緩衝區到socket緩衝區的拷貝而影響
程序的性能：
int nZero=0;
setsockopt(socket，SOL_S0CKET,SO_SNDBUF，(char *)&nZero,sizeof(nZero));
6.同上在recv()完成上述功能(默認情況是將socket緩衝區的內容拷貝到系統緩衝區)：
int nZero=0;
setsockopt(socket，SOL_S0CKET,SO_RCVBUF，(char *)&nZero,sizeof(int));
7.一般在發送UDP數據報的時候，希望該socket發送的數據具有廣播特性：
BOOL bBroadcast=TRUE;
setsockopt(s,SOL_SOCKET,SO_BROADCAST,(const char*)&bBroadcast,sizeof(BOOL));
8.在client連接服務器過程中，如果處於非阻塞模式下的socket在connect()的過程中可
以設置connect()延時,直到accpet()被呼叫(本函數設置只有在非阻塞的過程中有顯著的
作用，在阻塞的函數調用中作用不大)
BOOL bConditionalAccept=TRUE;
setsockopt(s,SOL_SOCKET,SO_CONDITIONAL_ACCEPT,(const char*)&bConditionalAccept,sizeof(BOOL));
9.如果在發送數據的過程中(send()沒有完成，還有數據沒發送)而調用了closesocket(),以前我們
一般采取的措施是"從容關閉"shutdown(s,SD_BOTH),但是數據是肯定丟失了，如何設置讓程序滿足具體
應用的要求(即讓沒發完的數據發送出去後在關閉socket)？
struct linger {
u_short l_onoff;
u_short l_linger;
};
linger m_sLinger;
m_sLinger.l_onoff=1;//(在closesocket()調用,但是還有數據沒發送完畢的時候容許逗留)
// 如果m_sLinger.l_onoff=0;則功能和2.)作用相同;
m_sLinger.l_linger=5;//(容許逗留的時間為5秒)
setsockopt(s,SOL_SOCKET,SO_LINGER,(const char*)&m_sLinger,sizeof(linger));
2014年2月5日 星期三
2014年1月7日 星期二
IBM product lifecycle
Up to date IBM product lifecycle information query from IBM website http://www-01.ibm.com/software/support/lifecycle/
2013年12月24日 星期二
IBM Acronyms
The IBM world is full of acronyms. The following list, is just a sampling of some of the many acronyms that are used by IBM professionals on a daily basis.
ACS - Autonomic Class Selection AMS - Access Method Services APF - Authorized Program Facility API - Application Programming Interface ASCB - Address Space Control Block ASclass - Address Space class ASclass - Address Space classentifier ASM - Auxiliary Storage Manager ASMP - Asymmetric Multi Processing BC - Business Class BCP - Base Control Program BDAM - Basic Direct Access Method BDW - Block Descriptor Word BI - Business Intelligence BLKSIZE - Block Size BPAM - Basic Partitioned Access Method BSAM - Basic Sequential Access Method BX - Byte Index CA - Control Area CBU - Capacity Backup CE - Customer Engineer CEC - Central Electronic Complex CFCC - Coupling Facility Control Code CHPclass - Channel Path classentifier CI - Control Interval CICS - Customer Information Control System CIU - Customer Initiated Upgrade CKD - Count Key Data CLISTS - Command Lists CMS - Conversational Monitor System COBOL - Common Business Oriented Language CP - Control Program CP - Central Processor CPC - Central Processor Complex CRM - Customer Relationship Management CSS IOPQ - Channel Subsystem I/O Priority Queuing CSS - Channel Subsystem CSTOR - Central Storage CTC - Channel to Channel CU - Control Units CUA - Control Unit Address CoD - Capacity on Demand DA - Device Adapter DASD - Direct Access Storage Device DAT - Dynamic Address Translation DBA - Database Administrator DCB - Data Control Block DCM - Dynamic Channel DD - Data Definition DFS - Distributed File System DOS - Disk Operating System DR - Disaster Recovery DUAS - Dual Address Space EAL5 - Common Criteria Evaluation Assurance Level 5 EAV - Extended Address Volume EC - Enterprise Class ECKD - Extended Count Key Data EFDS - Entry Sequence Data Set ERP - Enterprise Resource Planning ESA - Enterprise Systems Architecture ESCON - Enterprise Systems Connection ESS - Enterprise Storage System ESTOR - Expanded Storage ETR - External Time Reference FICON - Fiber Connection FLPA - Fixed Link Pack Area FTSS/SE - Field Technical Sales Support/Systems Engineer GDG - Generation Data Groups GDPS - Geographically Dispersed Parallel Sysplex GDS - Generation Data Set GRS - Global Resource Serialization HA - Host Adapter HDA - Head Disk Assembly HFS - Hierarchical File System HLQ - High Level Qualifier HMC - Hardware Management Console HSA - Hardware System Area ICF - Integrated Coupling Facility (for Parallel Sysplex) IFB - Infiniband IFL - Integrated Facility for Linux IMS - Information Management System IOCDS - I/O Control Data Set IOP - I/O Processors IPL - Initial Program Load ISMF - Interactive Storage Management Facility ISPF - Interactive System Productivity Facility ISV - Independent Software Vender JCL - Job Control Language JES - Job Entry Subsystem JVM - Java Virtual Machine KSDS - Keyed Sequence Data Set LCSS - Logical Channel Subsystems LDS - Linear Data Set LIC - Licensed Internal Code LPAR - Logical Partition LRECL - Logical Record Length MIPS - Million Instruction Per Second MLPA - Modified Link Pack Area MTBF - Mean Time Between Failure MVS - Multiple Virtual Storage NUMA - Non Uniform Memory Access OEM - Original Equipment Manufacturer OLTP - Online Transaction Processing (occur interactively with end user) PA - Program Action PAV - Parallel Access Volume PC - Program Call PDS - Partitioned Data Set PF - Program Function PFA - Predictive Failure Analysis PHCclass - Physical Channel classentifier Pclass - Process class PLPA - Pageable Link Pack Area POR - Power On Reset POSIX - Portability Operating Systems Interface PR/SM - Processor Resource/System Manager PSA - Prefix Storage Area PSA - Prefixed Saved Area PSW - Program Status Word PU - Processing Unit PX - Page Index QSAM - Queued Sequential Access Method R(F/S/T)X - Region (First/Second/Third) Index R1/2/3T - Region First/Second/Third Table RACF - Resource Access Control Facility RAS - Reliability, Availability, Serviceability RCT - Region Control Task RDF - Record Descriptor Field RDW - Record Descriptor Word RECFM - Record Format REXX - Restructured Extended Executor RISC - Reduced Instruction Set Computer RRDS - Relative Record Data Set RSM - Real Storage manager RTM - Recovery Termination Manager RX - Region Index SAP - System Assistance Processor SCB - Status Control Block SCP - System Control Program SDSF - System Display and Search Facility SE - Support Element SFM - Sysplex Failure Manager SIE - Start Interpretive Execution SIGP - Single Processor SLA - Service Level Agreement (Batch window defined here) SMB - Server Message Block SMP - Symmetric Multi Processing SMS - System Managed Storage SQA - System Queue Area SRB - Service Request Block SRM - System Resource Manager STI - Self timed interface SVC - Supervisor Call SX - Segment Index SYSPLEX - System Complex TCB - Task Control Block TFS - Temporary File System TOD - Time Of Day TOR - Terminal Owning Region TPS - Transactions per second TSO/E - Time Sharing Option/Extensions UA - Unit Address UCB - Unit Control Block USS - Unix System Services VOLSER - Volume Serial Number VSAM - Virtual Storage Access Method VSCR - Virtual Storage Constraint VSM - Virtual Storage Manager VTOC - Volume Table of Contents WLM - Workload Manager XA - Extended Architecture XM - Cross Memory dfMSM - dfStorage Management z/OS NFS - z/OS Network File System z/TPF - Z/Transaction Processing Facility z/VM - Z/Virtual Machine z/VSE - Z/Virtual Storage Extended zAAP - Z/OS Application Assist Processor zFS - zSeries File System zIIP - Z/OS Integrated Information Processor
訂閱：
文章 (Atom)