ctg at dib cics transaction gateway at dexia insurance belgium gse cics-db2 11/10/2007 rainbow ict...

CTG at DIB

CICS Transaction Gateway at Dexia Insurance Belgium

GSE CICS-DB2 11/10/2007Rainbow ICT ServicesPeter Christensen

CTG at DIB

• Mainframe environment – Z/OS 1.7

– DB2 7.0

– CICS TS 2.3

– MQ Series

– RACF

– OPC

– 3 LPAR:

LPAR Mips ENV DB2 CICS

PROD 505 1 3 8

DVLP

TEST

380 5 13 55

INST 36 1 1 6

• Decentral on INTEL– Virtualization: VMWARE

– CITRIX

– WAS 5.1

– JAVA 1.4 & 1.6

– CTG 6.0.1

CTG at DIB

• CICS Transaction GatewayIBM CICS Transaction Gateway provides secure, easy access from Web browsers and network computers to CICS applications, using standard Internet protocols in a range of configurations.

• Gateway DeamonSupports communication between client (eg Browser) and CTG server manages connections = connection thread(s)

• Client deamonSupports communication between CTG server and CICS Servers manages ECI-requests = worker thread(s)

CTG at DIB

• Platforms

– Z/OS Sysplex

– LINUX

– UNIX

– WINDOWS

• Connection protocols

– TCPIP (CICS 2.1)

– TCP62

– SNA

CTG at DIB

• ECI (External call interface)

– Calling a CICS program in a CICS server

– Commarea based (EXEC CICS LINK)

• EPI (External presentation interface)– Installs and deletes virtual IBM 3270 terminals– Supports ATI (Automatic Transaction Initiation)

• ESI (External security interface)– Accesses userid data in CICS External Security Manager– Setting default security management

CTG at DIB

• ECI request– Commarea– LUW control– LUW Identifier– Programname– Userid– Password– CICS server– Tpnname– Tranname

Java Coding:

String IPadr = "tcp://" + IPaddress; jg = new JavaGateway(IPadr,port);

ECIRequest req = new CIRequest(ECIRequest.ECI_SYNC,connectionID,uid,pwd,programma,transid,commarea,80,ECIRequest.ECI_NO_EXTEND,ECIRequest.ECI_LUW_NEW);

jg.flow(req);

jg.close();

CTG at DIB

• Programming Languages

– JAVA

– JCA (J2EE Communication Architecture)

– C , C++ and COBOL

– COM

CTG at DIB

Applications: Local Mode – Remote Mode

CTG at DIB

• Gateway Configuration

CTG at DIB

• Client Configuration

CTG at DIB

DVCTGPRD(C-NAME to DVSPCTGXX)

172.25.20.20

Host1

TCP/IP

DVSPCTG01(Server – Livingstone)

Port#: 2006

Host2DVSPCTG02

(VMware – Livingstone)Port#: 2006

DVSPCTGXXNLB-Cluster

DIBIS Client- DIBIS Appl (CITRIX)- IE with DC4ASF (WAS)

Claint:

- IE with E-mail (WAS)

CICSPA

Port#: 3611

CICSP2

Port#: 3392

Z/OS 1.7

dvvlapmf.dvsys.dv.be

Scheme for Production

Heartbeat

Heartbeat

Task Server

Heartbeat

CTG at DIB

NUMBERS:

• PROD 215.000/day

• PROD office hours 25.000/hour

• DVLP/TEST 70.000/day

• Stress/Performance 120.000/hour

• AVERAGE RESP END-TO-END 13 ms

– Includes CIEP + Mirror Trans

– minimal functionality in CICS

– LAN

• CPU on INTEL-server < 5%• STORAGE on INTEL-SEREVR < 400 MB

CTG at DIB

• MS Network Load Balancing– Advantages

• No additional cost• Simple setup – dynamic configuration• Allows by server failure to route IP-traffic to other servers defined in

the cluster– Disadvantages

• Is limited to detection of unavailability of IP-stack Application failure is not detected

– Heartbeat • Checks on a timely base the availability of application, via callout

infrastructure intervention on NLB cluster can be triggered– Management: NLB Manager

• Activated via command prompt• Create Cluster• Add – Remove hosts• Start – Stop – DrainStop hosts• Activate logging

CTG at DIB

• MS Network Load Balancing (continued)

CTG at DIB

• Evaluation at DIB– Availability: High no incidents in 2 years– Scalable: High limits are not met yet – Implementation: Easy basic architecture

simple installation simple configuration No operational issues

• TO DO– Implemenation of SSL– Reporting – Performance – Tracing

• References– IBM CICS Transaction Gateway version 6.0.1

ctg at dib cics transaction gateway at dexia insurance belgium gse cics-db2 11/10/2007 rainbow ict...

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