Full Material Salesforce

1

OM Technologies

2

OM Technologies

3

OM Technologies

4

OM Technologies

COBOL

COBOL stands for Common Business Oriented Language. It is the primary programming language used for developing applications on Mainframe. Even today, COBOL is treated as the BEST programming language for developing business applications.

5

OM Technologies

6

OM Technologies

Source Computer : It specifies the computer model used for compilation. Object Computer : It specifies the computer model used for execution. File-Control : All the files used in the program are declared here. I-O Control : Checkpoints on file data are set here.

7

OM Technologies

File section : All file related fields are declared here Working-Storage section : All temporary fields are declared here Linkage section : Fields used to pass data between programs are declared here

8

OM Technologies

9

OM Technologies

10

OM Technologies

11

OM Technologies

12

OM Technologies

13

OM Technologies

Note : V and S can be used with only numeric data type PICTURE clause is used to identify the data type and data length of a field.

Level Number It is used to describe the data hierarchy. We can use level numbers 01 to 49 and special level numbers 66, 77 and 88.

14

OM Technologies

15

OM Technologies

01 EMP-DET.. 05 EMP-ID PIC X(10) VALUE ‘E22’. 05 EMP-NAME. 07 FN PIC A(2) VALUE ‘RAM’. 07 MN PIC A(2) VALUE ‘PRASAD’. 07 LN PIC A(2) VALUE ‘K’. 05 EMP-SAL PIC 9(5) VALUE 25000. 05 DEPT-ID PIC X(2) VALUE ‘D1’. 05 EMP-JOIN-DT. 09 YYYY. 11 CC PIC X(2) VALUE ’20’. 11 YY PIC X(2) VALUE ’11’. 09 MM PIC X(2) VALUE ‘02’. 09 DD PIC X(2) VALUE ‘27’.

16

OM Technologies

17

OM Technologies

18

OM Technologies

19

OM Technologies

20

OM Technologies

21

OM Technologies

22

OM Technologies

23

OM Technologies

24

OM Technologies

25

OM Technologies

26

OM Technologies

27

OM Technologies

28

OM Technologies

29

OM Technologies

PROCEDURE DIVISION. STRING FN DELIMITED BY ‘ ‘, MN DELIMITED BY SPACE, LN INTO FULL-NAME WITH POINTER WS-PNT END-STRING. DISPLAY FULL-NAME. We can get the count of characters passed to FULL-NAME by subtracting initial WS-PNT value from the final WS-PNT value.

30

OM Technologies

PROCEDURE DIVISION. UNSTRING FULL-NAME DELIMITED BY SIZE INTO FN, MN, LN END-UNSTRING.

31

OM Technologies

32

OM Technologies

33

OM Technologies

34

OM Technologies

35

OM Technologies

36

OM Technologies

37

OM Technologies

38

OM Technologies

39

OM Technologies

40

OM Technologies

41

OM Technologies

42

OM Technologies

43

OM Technologies

44

OM Technologies

45

OM Technologies

46

OM Technologies

47

OM Technologies

48

OM Technologies

49

OM Technologies

50

OM Technologies

51

OM Technologies

52

OM Technologies

53

OM Technologies

JCL (Job Control Language)

• JCL acts as an interface between Operating System and Programming language.

• JCL is the carrier of the program and the data to OS and output from OS.

Uses of JCL

• It is used to compile & execute COBOL programs.

• It is used to create & delete datasets (PDS & PS), GDGs and VSAM clusters.

• It is used to copy data from one dataset to anther dataset.

• It is used to sort & merge the file data.

Important statements in JCL

JCL has 3 important statements – JOB, EXEC and DD statements

• A JOB can have maximum 255 EXEC statements.

• An EXEC statement can have maximum 255 DD statements.

Sample JCL

//FSS182EX JOB ‘A123’, ’OMTECH’, CLASS=A, MSGCLASS=A, MSGLEVEL=(1,1), PRTY=15,

TYPRUN=SCAN,

// NOTIFY=&SYSUID, REGION=6M, TIME=(30,10), COND=(4,LT), RESTART=STEP2

//JOBLIB DD DSN=FSS182.OMT.LOADLIB1, DISP=SHR

//STEP1 EXEC PGM=RPTPGM, REGION=3K, TIME=(10,20), COND=(8,LE), PARM=’23-07-

2011’

//STEPLIB DD DSN=FSS182.OMT.LOADLIB2, DISP=SHR

//DISK1 DD DSN=FSS182.OMT.POL.FILE, DISP=SHR

//DISK2 DD DSN=FSS182.OMT.POL.RPT,

// DISP=(NEW,CATLG,DELETE),

// DCB=(LRECL=133, BLKSIZE=1330, RECFM=FB, DSORG=PS),

// UNIT=DASD/TAPE, VOL-SER=V123,

// SPACE=(TRK,(5,6,0),RLSE),

// RETPD=1234 / EXPDT=12046

//SYSPRINT DD SYSOUT=*

//SYSOUT DD SYSOUT=*

//SYSUDUMP DD SYSOUT=*

//SYSIN DD *

P111

JB

/*

//

JCL Coding Sheet

12 (3 - 10) (12 - 15) (16/17 - 72) (73 - 80)

// NAME OPERATION OPERANDS USER COMMENTS

54

OM Technologies

//JOBNAME JOB Positional &

// Keyword Parameters

//STEPNAME EXEC

//DDNAME DD

NAME Parameter is used to identify a JCL statement.

OPERATION specifies the type of JCL statement.

OPERANDS can be classified into Positional & Keyword parameters.

• Positional parameters are mandatory and must be specified in a particular order

only

• Keyword parameters are optional and if specified can be in any order.

JOBLIB

It specifies the load library in which all the STEPs’ program load modules are referred.

That is, JOBLIB is applicable to all the steps.

Sample JCL


// NOTIFY=&SYSUID, REGION=6M, TIME=(30,10), COND=(4,LT),

// TYPRUN=SCAN, RESTART=STEP2


//STEP1 EXEC PGM=PROG1, REGION=3K, TIME=(10,20), COND=(8,LE), PARM=’23-07-2011’



//

STEPLIB

It specifies the load library in which ONLY a particular STEP’s program load module is referred.

That is, STEPLIB is applicable to only a particular the step.

Sample JCL






//STEP2 EXEC PGM=PROG2, REGION=3K, TIME=(10,20), COND=(8,LE), PARM=’23-07-

2011’


//STEP3 EXEC PGM=PROG3, REGION=3K, TIME=(10,20), COND=(8,LE), PARM=’23-07-

2011’

//

Note: When both JOBLIB and STEPLIB are specified, then first STEPLIB is referred and if load

module is not found, then JOBLIB is referred and if still not found, then System-defined load

libraries are referred and if still not found, abends with S806 abend code.

S806 – No Active Load Module found.

POSITIONAL Parameters in JOB statement: Accounting Information, Programmer Name.

Keyword Parameters in JOB statement : CLASS, PRTY, MSGCLASS, MSGLEVEL, NOTIFY, TYPRUN, RESTART, REGION, COND, TIME.

55

OM Technologies

Accounting Information : It specifies the account code for which billing is done for executing

programs on

Mainframe. All the job information i.e., the CPU time consumed, amount charged, start date &

end date can be seen in JESMSGLG of SPOOL.

Programmer Name : It specifies the coder name who has written the JCL.

Example :

//FSS182EX JOB ‘A123’, ’OMTECH’, CLASS=A, MSGCLASS=A, MSGLEVEL=(1,1)

//FSS182EX JOB , ’OMTECH’, CLASS=A, MSGCLASS=A, MSGLEVEL=(1,1)

//FSS182EX JOB ‘A123’, ,CLASS=A, MSGCLASS=A, MSGLEVEL=(1,1)

//FSS182EX JOB , , CLASS=A, MSGCLASS=A, MSGLEVEL=(1,1)

CLASS It categorizes jobs based on factors like CPU consumption time and CPU resource

utilization.

Class can have the range of values A – Z and 0 – 9.

Class=A Job can take 5 min for execution.

Class=B Job can take 10 min for execution.

Class=C Job can take 1 hour for execution.

Class=0 Job can utilize maximum CPU resources.

Class=1 Job can utilize minimum CPU resources.

PRTY : It sets the priority for the job execution. PRTY has the range of values – 0 to 15.

The highest the PRTY value, the first preference it is given for execution.

The Least the PRTY value, the least preference it is given for execution.

Note 1 : When two jobs are submitted, the job which is submitted first is executed first.

Note 2 : When two jobs are submitted at same time, the jobs are executed based on CLASS

parameter.

Note 3 : When two jobs are submitted at same time and with same CLASS parameter value, then

jobs are

executed based on PRTY value.

Note 4 : When two jobs are submitted at same time and with same CLASS and PRTY, then both

the jobs are

cancelled.

RESTART : It is used to start the job execution from a particular step(i.e., abended step).

Syntax : RESTART=STEP2


// NOTIFY=&SYSUID, REGION=6M, TIME=(30,10), COND=(4,LT),RESTART=STEP2

//STEP1 EXEC PGM=PROG1



//

MSGCLASS : MSGCLASS specifies the output device to which messages need to be sent.

MSGCLASS can have a range of values A-Z. 0-9.

MSGCLASS=A Printer

MSGCLASS=X SPOOL

MSGCLASS=0 TOOL1 (Eg : JOBH)

56

OM Technologies

MSGCLASS=0 TOOL2 (Eg : AXIOM)

MSGLEVEL

TYPRUN

NOTIFY:

It specifies the USER ID to which the STATUS NOTIFICATION is sent about the successful or

unsuccessful execution of job.

Status Notification can be known by MaxCC.

When MaxCC = 0/4, it indicates successful execution of job.

Other than 0/4, it indicates unsuccessful execution of job.

NOTIFY=&SYSUID will substitute the USER ID with which User has logged in. So, the status

notification will be sent to the same User ID.

57

OM Technologies

Suppose User has logged in with FSS141 and specified NOTIFY=FSS142, then Status notification is

sent to FSS142 but the SPOOL information remains with FSS141.

REGION:

REGION parameter specifies the amount of workspace required for a job or step’s execution.

REGION is specified in Kilo or Mega Bytes and in ODD quantities.

Eg : REGION=5M / 3K

Maximum REGION space can be allocated by specifying REGION=0K or 0M.

//JOB1 JOB ‘A123,’KEERTHI’,CLASS=A,MSGCLASS=X,REGION=5M

//JOBLIB DD DSN=FSS046.KEERTHI.LOADLIB1,DISP=SHR

//STEP1 EXE C PGM=PROG1

//STEP2 EXE C PGM=PROG2,REGION=3K


NOTE 1 : REGION specified in JOB is applicable by all the steps in the job.

NOTE 2 : REGION specified in STEP is applicable to only that particular step.

NOTE 3 : REGION specified in both JOB and STEP, then value specified in JOB overrides that of

STEP.

TIME

TIME parameter specifies the amount of time to be allocated for a job or step’s execution.

TIME=(minutes,seconds)

TIME=(10,20)

TIME=10

TIME=(,20)

Maximum TIME can be allocated by specifying TIME=1440

TIME= NOLIMIT

TIME=MAX

//JOB1 JOB ‘A123,’KEERTHI’,CLASS=A,MSGCLASS=X,TIME=(10,30)



//STEP2 EXE C PGM=PROG2,TIME=5


NOTE 1 : TIME specified in JOB is applicable to all the steps in the job.

NOTE 2 : TIME specified in STEP is applicable to only that particular step.

NOTE 3 : TIME specified in both JOB and STEP, then value specified in JOB overrides that of

STEP.

COND

When a job is executed, all the steps execute irrespective of their previous sterps execute

successfully or unsuccessfully.

COND parameter is used to control the execution of steps.

When COND specified is false, the step executes.

When COND specified is true, the step is bypassed.

Note : COND is applicable for all the steps except the first step.

58

OM Technologies

//JOB1 JOB ‘A123,’KEERTHI’,CLASS=A,MSGCLASS=X,COND=(4,LT)



//STEP2 EXE C PGM=PROG2,COND=(8,LE)


NOTE 1 : COND specified in JOB is applicable to all the steps except the first step.

NOTE 2 : COND specified in STEP is applicable to only that particular step.

NOTE 3 : COND specified in both JOB and STEP, then value specified in STEP overrides that

of JOB.

Scenario 1: Never execute the step i.e., even the step executes successfully or unsuccessfully, do

not execute the step. So, the COND specified must be true for all return codes of previous step.

//JOB1 JOB ‘A123,’KEERTHI’,CLASS=A,MSGCLASS=X



//STEP2 EXE C PGM=PROG2,COND=( 0 , LE)

Or

//STEP2 EXE C PGM=PROG2,COND=( 4095 , GE)

Scenario 2: Always execute the step i.e., even the step executes successfully or unsuccessfully,

always execute the step. So, the COND specified must be false for all return codes of previous

step.




//STEP2 EXE C PGM=PROG2,COND=( 0 , GT)

Or

//STEP2 EXE C PGM=PROG2,COND=( 4095 , LT)

Scenario 3:Execute the step ONLY when the previous step executes successfully.

So, the COND specified must be false for return codes 0 and 4 only.




//STEP2 EXE C PGM=PROG2,COND=( 4 , LT)

OR

//STEP2 EXE C PGM=PROG2,COND=( 8 , LE)

Scenario 4:Execute the step ONLY when the previous step executes unsuccessfully.

59

OM Technologies

So, the COND specified must be false for return codes 8 to 4095.




//STEP2 EXE C PGM=PROG2,COND=( 8 , GT)

OR

//STEP2 EXE C PGM=PROG2,COND=( 4 , GE)

EXEC Statement

Positional Parameters in EXEC statement :

PGM

Keyword Parameters in EXEC statement :

REGION

TIME

COND

PARM

PGM specifies the program name to be executed.

PARM parameter is used to pass the data from JCL to COBOL. We can pass a maximum of 100

characters only.

PARM parameter is specified in the EXEC statement as follows :

//STEP1 EXEC PGM=RPTPGM, PARM=’23-07-2011’

Data specified in PARM parameter is received into COBOL program as follows :

DATA DIVISION.

LINKAGE SECTION.

01 LS-PARM.

10 LS-PARM-LEN PIC S9(4) COMP.

10 LS-PARM-TEXT PIC X(100).

PROCEDURE DIVISION USING LS-PARM.

DISPLAY LS-PARM-TEXT.

Sample JCL





//STEP1 EXEC PGM=RPTPGM, REGION=3K, TIME=(10,20), COND=(8,LE), PARM=’23-07-2011’


//DISK1 DD DSN=FSS182.OMT.POL.FILE, DISP=SHR

//DISK2 DD DSN=FSS182.OMT.POL.RPT,


// DCB=(LRECL=133, BLKSIZE=1330, RECFM=FB, DSORG=PS),

// UNIT=DASD/TAPE, VOL-SER=V123,

// SPACE=(TRK,(5,6,0),RLSE),

// RETPD=1234 / EXPDT=12046



//SYSUDUMP DD SYSOUT=*

//SYSIN DD *

P111

JB

/*

60

OM Technologies

//

DD Statement

DD statement specifies the characteristics of a dataset.

Keyword Parameters in DD statement :

DSN

DISP

DCB

UNIT

SPACE

VOL-SER

RETPD

EXPDT

DSN :

Status

NEW : It is specified for a new dataset and the corresponding OPEN Mode is OUTPUT.

SHR : It is specified for an existing dataset and the corresponding OPEN Mode is INPUT.

OLD : It is specified for an existing dataset and the corresponding OPEN Mode can be INPUT,

OUTPUT, I-O.

MOD : It is specified for a new or existing dataset and the corresponding OPEN Mode is EXTEND.

CATLG : When a new dataset is created, the dataset information is stored in the System Catalog.

UNCATLG : It removes the dataset information from the System Catalog but the dataset still

remains in the system catalog.

61

OM Technologies

KEEP : When KEEP is specified for a new dataset, the dataset is created but its information is not

stored in System Catalog. So, each time the dataset is to be accessed, user needs to specify the

Volume Serial Number.

Note : KEEP must always be specified for existing datasets as follows :

DISP=(SHR,KEEP,KEEP)

DISP=(OLD,KEEP,KEEP)

DELETE : It deletes the dataset from hard disk and it information from system catalog.

Examples :

DISP = (NEW,CATLG,DELETE)

DISP = (OLD,CATLG,UNCATLG)

By Default,

DISP = NEW will take DISP=(NEW,DELETE,DELETE)

DISP = SHR will take DISP=(SHR,KEEP,KEEP)

DISP = OLD will take DISP=(OLD,KEEP,KEEP)

DISP = MOD will take DISP=(MOD,CATLG,DELETE)

UNIT parameter specifies the storage device on which the dataset is to be created.

UNIT =DASD/SYSDA stores dataset on Hard Disk.

DASD - DIRECT ACCESS STORAGE DEVICE

SYSDA - SYSTEM DIRECT ACCESS

UNIT =TAPE stores dataset on TAPE device.

TAPE is an external device made of magnetic strips used to take backup of data.

VOL-SER specifies the volume serial number of the memory volume on which dataset is to be

created.

VOL-SER=V134

SPACE parameter specifies the amount of memory to be allocated for a dataset.

SPACE is allocated

SPACE=((Primary Quantity, Secondary Quantity, Directory Blocks),RLSE)

First Primary Quantity is allocated.

If not sufficient, then Secondary Quantity is allocated.

If still not sufficient, then again Secondary Quantity is allocated and so on upto 15 extents.

Eg : SPACE=(1000,(10,20),RLSE)

SPACE=(BLKS,(10,20,5),RLSE)

SPACE=(TRKS,(5,10))

SPACE=(CYL,(10,5),RLSE)

DCB (Data Control Block)

DCB specifies the characteristics of a dataset.

DCB=(LRECL=100,BLKSIZE=10000,RECFM=FB,DSORG=PS)

LRECL : It specifies the record length of the file.

LRECL = 100

BLKSIZE : It specifies the Size of the block in which records are stored.

BLKSIZE must always be an exact multiple of LRECL.

BLKSIZE=10000

62

OM Technologies

Number of records per block = BLKSIZE / LRECL

= 10000 / 100 = 100

When READ statement executes, then one block of records are retrieved from hard disk to

buffer.

This will reduce the number of I/O operations, thereby improving the program efficiency.

RECFM : It specifies the record format of the file.

There are two types of files – FIXED and VARIABLE files.

RECFM = FB / VB --- Maximum records are stored per block.

RECFM = F / V --- Only one record is stored per block.

RETPD (Retention Period)

It specifies the life of a dataset.

RETPD = dddd where dddd indicate number of days.

Eg : RETPD = 1345 indicates after 1345 days, the dataset will be deleted.

EXPDT (Expiration Date)

It specifies the life of a dataset.

EXPDT = YYddd where YY indicates year.

Eg : EXPDT = 14054 indicates after 54 days in 2014, the dataset will be deleted.

Sample Execution JCL

//JOB1 JOB ‘A123,’KEERTHI’,CLASS=A,MSGCLASS=X, MSGLEVEL=(1,1),COND=(4,LT)



//STEPLIB DD DSN=FSS046.RAMESH.LOADLIB,DISP=SHR

//DISK1 DD DSN=FSS141.POL.FILE,DISP=SHR

//DISK2 DD DSN=FSS141.JB.FILE,DISP=(NEW,CATLG,DELETE),

// DCB=(LRECL=150,BLKSIZE=0,RECFM=FB),

// SPACE=(TRK,(10,5,0),RLSE)

//DISK3 DD DSN=FSS141.JS.FILE,DISP=(NEW,CATLG,DELETE),



//STEP2 EXE C PGM=RPTPGM

//DISK1 DD DSN=FSS141.JB.FILE,DISP=SHR

//DISK2 DD DSN=FSS141.JB.RPT,DISP=(NEW,CATLG,DELETE),


63

OM Technologies


//STEP3 EXE C PGM=RPTPGM,COND=(4,LT,STEP1)

//DISK1 DD DSN=FSS141.JS.FILE,DISP=SHR

//DISK2 DD DSN=FSS141.JS.RPT,DISP=(NEW,CATLG,DELETE),



JCL UTILITIES

• IEBGENER

• IEBCOPY

• IEFBR14

• IDCAMS

• SORT

IEBGENER : It is used to copy data from one PS to another PS.

//JOB1 JOB - - - - -

//STEP1 EXEC PGM=IEBGENER

//SYSUT1 DD DSN=FSS141.POL.FILE,DISP=SHR

//SYSUT2 DD DSN=FSS141.POL.FILE.BACKUP,



// SPACE=(CYL,(10,5),RLSE)



IEBCOPY : It is used to copy data from one PDS to another PDS.

//JOB1 JOB - - - - -

//STEP1 EXEC PGM=IEBCOPY

//SYSUT1 DD DSN=FSS141.OMT.SOURCE,DISP=SHR

//SYSUT2 DD DSN=FSS141.RAMU.SOURCE,


// DCB=(LRECL=100,BLKSIZE=1000,RECFM=FB,DSORG=PO),

// SPACE=(CYL,(10,5,5),RLSE)



//SYSIN DD *

COPY INDD=SYSUT1, OUTDD=SYSUT2

/*

To copy ONLY selected members from one PDS to another PDS.

//SYSIN DD *


SELECT MEMBER=(PROG3,PROG66,PROG78)

/*

To EXCLUDE ONLY selected members from copying.

//SYSIN DD *


EXCLUDE MEMBER=(PROG3,PROG66,PROG78)

/*

64

OM Technologies

IEFBR14 : It is used to create & delete datasets.

//JOB1 JOB - - - - -

//STEP1 EXEC PGM=IEFBR14

//SYSUT1 DD DSN=FSS141.OMT.SOURCE,


// DCB=(LRECL=100,BLKSIZE=1000,RECFM=FB,DSORG=PO),

// SPACE=(CYL,(10,5,4),RLSE)



Deleting datasets

//SYSUT1 DD DSN=FSS141.POL.FILE,

// DISP=(OLD,DELETE,DELETE)

//SYSUT1 DD DSN=FSS141.POL.FILE,

// DISP=(MOD,DELETE,DELETE)

IDCAMS : It is used to delete one or more datasets.

//JOB1 JOB ------

//STEP1 EXEC PGM=IDCAMS

//SYSIN DD *

DELETE ‘FSS141.OMT.SOURCE’ -

DEL ‘FSS143.POL.FILE’

/*

SORT : It is used to sort the data in file.

To copy data from one file to another file

//JOB1 JOB - - - - -

//STEP1 EXEC PGM=SORT

//SORTIN DD DSN=FSS142.POL.FILE,DISP=SHR

//SORTWK01 DD UNIT=DASD,SPACE=(TRK,(2,2),RLSE)



//SORTOUT DD DSN=FSS142.POL.FILE.SORTED,


// DCB=*.SORTIN,

// SPACE=(TRK,(10,10),RLSE)

//SYSIN DD *

SORT FIELDS=COPY

/*

To sort file in ascending or descending order

//SYSIN DD *

SORT FIELDS=(1,10,CH,A)

/*

SORT FIELDS = (1,10,CH,A) --------- SORT CARD

CH Alphanumeric

65

OM Technologies

N Numeric

BI Binary

PD Packed Decimal

SORTIN is the INPUT DD name for the SORT utility

SORTOUT is the OUTPUT DD name for the SORT utility.

SORTWRK files are required to do the sorting process before processing the data into SORTOUT.

To copy only selected records based on condition

//SYSIN DD *

SORT FIELDS = COPY

INCLUDE COND = (23,5,CH,EQ,C ‘JB’)

/*

To exclude the records based on the condition

//SYSIN DD *

SORT FIELDS = COPY

OMIT COND = (23,5,CH,EQ,C ‘JB’)

/*

To eliminate duplicate records and to copy only unique records

//SYSIN DD *

SORT FIELDS = (23,5,CH,A)

SUM FIELDS = NONE

/*

To COPY duplicate records

//SYSIN DD *

SORT FIELDS = (23,5,CH,A)

SUM FIELDS = NONE,XSUM

/*

//SORTXSUM DD DSN=FSS142.POL.FILE.DUP,DISP=OLD

To split a file data into multiple datasets

//JOB1 JOB - - - - -

//STEP1 EXEC PGM=SORT

//SORTIN DD DSN=FSS142.POL.FILE,DISP=SHR




//SORTOF01 DD DSN=FSS142.JB.FILE,


// DCB=*.SORTIN,


//SORTOF02 DD DSN=FSS142.JS.FILE,


// DCB=*.SORTIN,


//SYSIN DD *

SORT FIELDS = COPY

OUTFIL FNAMES=SORTOF01,INCLUDE = (20,10,CH,EQ,C ’JB’)

OUTFIL FNAMES=SORTOF02,INCLUDE = (20,10,CH,EQ,C ‘JS’)

/*

GDG is a collection of similar datasets i.e., structurally and functionally same.

66

OM Technologies

Uses of GDG

1. GDGs are used to take backup of data.

2. GDGs automate the process of deleting & creating datasets once the limit is reached.

3. We need not change the JCL for changing the file names.

GDG has two components.

1. GDG Base

2. GDG Generation

GDG Base is created using the utility IDCAMS as follows :

//JOB1 JOB - - - - - - - -

//STEP1 EXEC PGM=IDCAMS

//SYSIN DD *

DEFINE GDG( -

NAME(FSS141.REL.DAILY.GDG) -

LIMIT(7) -

NOEMPTY/EMPTY -

NOSCRATCH/SCRATCH)

/*

NAME parameter specifies the GDG Base name

LIMIT parameter specifies the maximum number of generations that a GDG Base can hold.

Note : We can specify a maximum LIMIT of 255

Upon reaching the limit,

NOEMPTY Uncatalogs oldest generation.

EMPTY Uncatalogs all generations

SCRATCH Deletes the uncataloged generations.

NOSCRATCH Does not delete any generations.

In a week, 7 GDG Generations are created as follows :

67

OM Technologies

Weekly Backup of 7 Daily Files :

//JOBW JOB - - - - - - - -


//SYSUT1 DD DSN=FSS141.REL.DAILY.GDG.G0001V00,DISP=SHR

// DD DSN=FSS141.REL.DAILY.GDG.G0002V00,DISP=SHR






//SYSUT2 DD DSN=FSS141.REL.WEEKLY.GDG(+1),




//JOBW JOB - - - - - - - -


//SYSUT1 DD DSN=FSS141.REL.DAILY.GDG(-6),DISP=SHR

// DD DSN=FSS141.REL.DAILY.GDG(-5),DISP=SHR





// DD DSN=FSS141.REL.DAILY.GDG(0),DISP=SHR

//SYSUT2 DD DSN=FSS141.REL.WEEKLY.GDG(+1),




Procedures

PROCEDURE is a set of reusable JCL statements. We cannot use * and JOBLIB in a PROC definition. Procedures are of two types.

1. INSTREAM PROCEDURE 2. CATALOGED PROCEDURE

68

OM Technologies

Instream Procedures

//JOB1 JOB --------- //JOBLIB DD DSN=FSS142.KEERTHI.LOADLIB,DISP=SHR //STEP1 EXEC PGM=PROG1 //PROC1 PROC //STEPA EXEC PGM=RPTPGM //DISK1 DD DSN=FSS146.JB.FILE,DISP=SHR //DISK2 DD DSN=FSS146.JB.RPT, // DISP=(NEW,CATLG,DELETE), // DCB=(LRECL=133,BLKSIZE=0,RECFM=FB), // SPACE=(TRK,(10,5,0),RLSE) //SYSIN DD DSN=FSS145.CNTL.CARD,DISP=SHR // PEND //STEP2 EXEC PROC1 //STEP3 EXEC PROC=PROC1 //STEP4 EXEC PGM=PROG2 //STEP5 EXEC PROC1 // Instream Procedures Vs Catlagoed Procedure

Symbolic Parameters

Symbolic parameters are used to substitute DD statement parameter values. They are identified by using single ‘&’. Default values must be specified in PROC definition. When Symbolic parameter values are specified in both JOB and PROC, then JOB values are considered.

69

OM Technologies

Overriding Parameters These parameters are used to override the existing values for EXEC statement parameters. Syntax : Stepname.Parameter = New-value For COND parameter, COND.Stepname = New-value

70

OM Technologies

Db2 Database

Database management system (DBMS) is a software package that manages data stored in databases. IBM’S Database 2 , commonly referred to as DB2, was made available in 1983 as RDBMS concept. Prior to DB2, IBM developed a HDBMS product IMS DB.

Data on Mainframe is stored in two ways : 1. Files 2. Database

DB2 is the RDBMS developed by IBM for storing and accessing heavy data. RDBMS – Relational Data Base Management System. RDBMS allows data access to entities by establishing the following relationships : ONE TO MANY MANY TO ONE MANY TO MANY

Advantages of database over files : 1. Database supports high volume of data storage whereas files support low volume of data

storage. 2. Database provides data security at various levels whereas files do not. 3. Accessing database data is easy as compared to files where programming is required. 4. Database supports data concurrency & locking. 5. Database avoids data redundancy.

When DB2 S/W is installed on the Mainframe, a system space and user space are created. In the SYSTEM SPACE, default tables called DB2 catalog tables & DB2 directory tables are stored. DB2 Catalog tables store the information of the user created database objects. SYSIBM.SYSTABLESPACES store tablespaces’ information. SYSIBM.SYSTABLES store tables’ information. SYSIBM.SYSCOLUMNS store columns’ information. SYSIBM.SYSVIEWS store views’ information. DB2 Directory tables store the information about the physical memory locations of database objects. In the USER SPACE, user created database objects like tablespaces, tables, views, synonyms, stored procedures, etc.

71

OM Technologies

Table: Table is the entity where we can store the data in the form of rows and columns. Storage grp: It is a set of memory volumes allocated to the table space. Data in table spaces are stored in the form of the tables. Page: Page is an amount of space in the table space which is used to transmit the data from system memory to buffer. Page size can be 4k, 8k….32k. Page can have maximum of 127 rows. Table spaces are again 3 types. Simple Segmented Partitioned

Simple table space: In this type of TS, a page can hold more than one table’s data. Segmented table space: In this type of TS, a page can hold ONLY one table’s data. Partitioned table space: In this type of TS, a set of pages are grouped into a partition and only specific data is stored in each partition. Using partitioned table space, amount of memory to be scanned is reduced, thereby improves the DB2 performance. Data types in DB2 and COBOL DB2 COBOL SMALL INT 2 bytes S9(4) COMP INT 4 Bytes S9(9) COMP CHAR (N) N Bytes X(n) VARCHAR (N) (N+2) Bytes 01 VAR-FIELD 49 LEN PIC S9(4) COMP. 49 TEXT PIC X(N). DECIMA S9(M-N)V9(N) COMP-3 DATE 10 Bytes X(10) [DD-MM-YYYY] TIME 8 Bytes X(08) [HH.MN.SS] TIMESTAMP 26 Bytes X(26) [DD-MM-YYYY- HH.MN.SS-NNNNN] DB2 data is accessed using SQL queries. DDL CREATE, ALTER , DROP DML INSERT, UPDATE, DELETE, SELECT DCL GRANT, REVOKE

72

OM Technologies

CREATE: It is used to create database objects. Creating a database: CREATE DATABASE DB123. Creating a table space: CREATE TABLE SPACE TS123 STORGROUP3 PAGESIZE 16K SEGMENTED IN DB123. Creating a table: CREATE TABLE EMP_TBL (EMP_ID INT NOT NULL, EMP_NAME CHAR(30), EMP_DEPT SMALL INT, EMP_SAL DECIMAL(11,2), EMP_ADDR VARCHAR(50), EMP_JOIN_DT DATE NOT NULL WITH DEFAULT, EMP_JOIN_TM TIME, TRANS_TS TIMESTAMP, PRIMARY KEY (EMP_ID), ON DELETE CASCADE) IN DB123.TS123 Constraint is a mechanism to control the data in the tables.

1. Primary Key. 2. NULL Constraints 3. Referential Integrity

Primary Key: It is used to uniquely identify a row in the table. When primary key constraint set on a column it does not allow duplicate or null values. Null value : It is an unknown value assigned to a column when no value is specified. Null Constraint: By default, any column is nullable (allows null values). Not Null Constraint: It does not allow null values to be stored and so a value must be specified. Not Null with Default: If no value is specified then instead of storing null value it stores a default value based on the data type. Note: For SMALL INT INT and DECIMAL Zeroes are the default values. For CHAR Spaces are the default values. For DATE Current date is the default value. For TIME Current time is the default value. For TIMESTAMP Current time stamp is the default value.

73

OM Technologies

Referential Integrity: It controls the data in the parent and child table Foreign Key: It is used to build the relationship between the tables. It must be a primary key of the table and when we use this in the other table then it becomes as a foreign Key. Table in which it is primary key then it is called Parent table and the table in which it is foreign key then it is called child table. RI rules :

1. Insert Rule 2. Update Rule 3. Delete Rules

- ON DELETE CASCADE - ON DELETE RESTRICT - ON DELETE SET NULL INSERT RULE : It says before inserting a row with new foreign key value, insert it first into parent table. UPDATE RULE : It says before updating a row with new foreign key value, update it first in the parent table. DELETE Rules :

1. ON DELETE CASCADE : It says when a parent table row is deleted, the corresponding rows in all child tables also get deleted.

2. ON DELTE RESTRICT : It says when a parent table row with corresponding rows in child tables is to be deleted, then a restriction is applied. So, first, delete the child table rows and then parent table row.

3. ON DELETE SET NULL : It says when a parent table row is deleted, the foreign key values for the corresponding rows in all child tables are set to NULL.

ALTER: It is used to modify the database objects. Syntax: ALTER EMP_TBL ADD EMP_DOB DATE This column will add at the last in the table EMP_TBL. Note: A column can be added only as the last column in the table. If we need to add the column in between the columns then we need to drop and create new table. We can change the data types and data lengths. ALTER EMP_TBL SET EMP_SAL DECIMAL (11,2) DECIMAL(13,2) We can change the data types, increase/decrease the data length if a table is empty. But if the table is non empty we can only increase the data length. DROP: Drop is used to permanently delete a data object in a database. Syntax: DROP TABLE EMP_TBL DROP VIEW V_EMP_TBL DML(Data Manipulation Language) INSERT: It is used to insert a new row into the table. Only one row at a time. INSERT INTO EMP_TBL

74

OM Technologies

VALUES (0314,’RAMESH’…) If all the values are specified, then column names need not be specified. INSERT INTO EMP_TBL (EMP_ID, EMP_NAME) VALUES (0314,’RAMESH’) UPDATE: It is used to modify the existing data in the table. UPDATE EMP-TBL SET EMP-SAL=EMP-SAL+1000 The above code will update all EMP-SAL column values in the table. UPDATE EMP-TBL SET EMP-SAL=EMP-SAL+1000 WHERE DEPT=’D1; WHERE clause is used to specify a condition based on which rows selective. DELETE: It is used to delete the rows from the table. DELETE FROM EMP-TBL, it will delete all the rows. DELETE FROM EMP-TBL WHERE DEPT = ‘D1’ SELECT: It is used to retrieve the rows from the table. SELECT * FROM EMP-TBL The above query retrieves all the rows and columns. SELECT EMP-ID,EMP-SAL FROM EMP-TBL This query retrieves all the rows with column EMP-ID & EMP-SAL. SELECT * FROM EMP-TBL WHERE DEPT = ‘D1’ This query will retrieve all the rows with DEPT value ‘D1’. SELECT EMP-ID FROM EMP-TBL WHERE EMP-SAL BETWEEN 10000 AND 300000 It issues a permissions on DML commands GRANT: To provide access or permissions on data base objects to the users. Syntax: GRANT INSERT,SELECT ON EMP_TBL TO FSS141, GRP1. GRANT ALL ON EMP_TBL TO FSS142, FSS156 [ REVOKE: To remove the authorizations or permissions. REVOKE INSERT ON EMP_TBL FROM FSS141, GRP1. REVOKE ALL ON EMP_TBL FROM FSS142, FSS156

75

OM Technologies

SQLCA SQLCA is SQL Communication Area. It is the communication are between COBOL and DB2. SQLCA is used in the program as follows : EXEC SQL INCLUDE SQLCA END-EXEC. The above statement is resolved during DB2 pre-compilation as follows : 01 SQLCA. 03 SQLAID PIC 03 SQLCODE PIC 03 SQLWARN PIC 03 SQLERR PIC 03 SQLSTATE PIC SQLCODE is used to know the status of a Db2 statement. If SQLCODE is 0 or +ve, DB2 execution is successful If SQLCODE is -ve, DB2 execution is unsuccessful SQLCODE = 0 Successful and row found SQLCODE = 100 Successful but row not found

76

OM Technologies

DB2 Compilation Process & BIND Parameters

DB2 Program preparation involves the following steps : 1. Coding the program.

2. Pre-compilation

3. BIND

4. Compilation

5. LINK-EDIT

6. Execution

77

OM Technologies

78

OM Technologies

79

OM Technologies

80

OM Technologies

81

OM Technologies

CURSORS

What is the need of cursor? When a SELECT query retrieves more than one row, the program will abend with SQLCODE -811 since it cannot hanlde multiple rows at a time. Eg : SELECT EMP_SAL FROM EMP_TBL WHERE DEPT_ID = ‘D6’ Then how to handle multiple rows in the program? Ans: Using Cursor. What is a Cursor ? Ans: Cursor is a pointer to a row in the resultant table. Cursor Life Cycle :

Declaring cursor. Opening the cursor. Fetching the cursor. Closing the

cursor.

82

OM Technologies

Closing cursorL:f

Closing the cursor : It used to delete the cursor and the resultant table. Exec SQL Close EMPCUR

83

OM Technologies

END-EXEC

Updateable View A View is said to be Updateable when it satisfies all of the below specified conditions :

1. View must be created on a single table.

84

OM Technologies

2. No DISTINCT, GROUP BY or HAVING must be used. 3. No SUB-QUERIES must be used. 4. No Arithmetic operations must be used. 5. Base Table columns other than View columns must be nullable.

Non-Updateable View A View is said to be Non-Updateable when it does not satisfy any one or all of the below specified conditions : 1. View must be created on a single table. 2. No DISTINCT, GROUP BY or HAVING must be used. 3. No SUB-QUERIES must be used. 4. No Arithmetic operations must be used. 5. Base Table columns other than View columns must be nullable.

Aggregate Functions

These aggregate functions are used to act on a set of column values. 1 MAX : It gives the maximum value from a set of column values. SELECT MAX(EMP_SAL) FROM EMP_TBL 2. MIN : It gives the minimum value from a set of column values. SELECT MIN(EMP_SAL) FROM EMP_TBL 3. SUM : It gives the sum of a set of column values. SELECT SUM(EMP_SAL) FROM EMP_TBL 4. AVG : It gives the average of a set of column values. SELECT AVG(EMP_SAL) FROM EMP_TBL Note : AVG will give an incorrect value when the column has null values. 5. COUNT : It gives the count of column values. SELECT COUNT(EMP_SAL) FROM EMP_TBL It gives the count of column values in the table excluding null values. SELECT COUNT(*) FROM EMP_TBL It gives the count of rows in the table.

GROUP BY

It is used to group a set of similar column values. GROUP BY is mandatory when a combination of non-aggregate and aggregate columns are used. To get the count of employees department wise : SELECT DEPT_ID, COUNT(*) FROM EMP_TBL GROUP BY DEPT_ID To get the count of students class wise : SELECT CLASS, COUNT(*) FROM SCH_TBL GROUP BY CLASS To get the count of students class & section wise : SELECT CLASS, SECTION, COUNT(*) FROM SCH_TBL

85

OM Technologies

GROUP BY CLASS, SECTION

HAVING

It is used to specify a condition which acts on a set of column values. HAVING must always follow GROUP BY clause. Example : SELECT DEPT_ID, COUNT(*) FROM EMP_TBL GROUP BY DEPT_ID HAVING COUNT(*) > 3 SELECT DEPT_ID, COUNT(*) FROM EMP_TBL GROUP BY DEPT_ID HAVING DEPT-ID = ‘D3’

Sub- Queries

There are two types of sub-queries :

1. Non-correlated sub-queries.

2. Correlated sub-queries.

Non-correlated sub-queries : First the Inner Query executes and then based on its result, the Outer query executes. Correlated sub-queries : First the Outer Query executes and for each row of outer query, the inner query executes i.e., first the outer query executes then the inner query.

Non-correlated Sub-queries

First the Inner Query executes and then based on its result, the Outer query executes. Example : To find the 2nd maximum salary SELECT MAX(SAL) FROM EMP_TBL

WHERE SAL < (SELECT MAX(SAL) FROM EMP_TBL)

Example : To find the 3rd maximum salary SELECT MAX(SAL) FROM EMP_TBL

WHERE SAL < (SELECT MAX(SAL) FROM EMP_TBL) WHERE SAL < (SELECT MAX(SAL) FROM EMP_TBL)

86

OM Technologies

Correlated Sub-queries

First the Outer Query executes and for each row of outer query, the inner query executes i.e., first the outer query executes then the inner query. Example : To find the 2nd maximum salary

SELECT E1.SAL FROM EMP_TBL E1 WHERE 1 = (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2

WHERE E2.SAL > E1.SAL)

Example : To find the 3rd maximum salary SELECT E1.SAL FROM EMP_TBL E1

WHERE 2 = (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2 WHERE E2.SAL > E1.SAL) To find the nth maximum salary

SELECT E1.SAL FROM EMP_TBL E1 WHERE n-1 = (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2

WHERE E2.SAL > E1.SAL) Example : To find the 2nd minimum salary SELECT E1.SAL FROM EMP_TBL E1

WHERE 1 = (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2 WHERE E2.SAL < E1.SAL) Example : To find the 3rd minimum salary SELECT E1.SAL FROM EMP_TBL E1

WHERE 2 = (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2 WHERE E2.SAL < E1.SAL) To find the nth minimum salary SELECT E1.SAL FROM EMP_TBL E1

WHERE n-1 = (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2 WHERE E2.SAL < E1.SAL) Example : To get the list of TOP 5 salaries SELECT E1.SAL FROM EMP_TBL E1 WHERE 5 > (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2

WHERE E2.SAL > E1.SAL) To get the list of TOP N salaries SELECT E1.SAL FROM EMP_TBL E1

WHERE n > (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2 WHERE E2.SAL > E1.SAL) Example : To get the list of LEAST 5 salaries SELECT E1.SAL FROM EMP_TBL E1

WHERE 5 > (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2 WHERE E2.SAL < E1.SAL) To get the list of LEAST N salaries

SELECT E1.SAL FROM EMP_TBL E1 WHERE n > (SELECT COUNT(DISTINCT E2.SAL) FROM EMP_TBL E2 WHERE E2.SAL < E1.SAL)

JOINS

87

OM Technologies

JOIN is used to combine columns from more than one table i.e., data can be retrieved from more than one table by joining them on some common columns. Types of Joins :

1. INNER JOIN 2. OUTER JOIN

- LEFT OUTER JOIN - RIGHT OUTER JOIN - FULL OUTER JOIN

88

OM Technologies

89

OM Technologies

UNIONS UNION is used to combine rows from more than one table. For using UNION, the data types and number of columns in both the queries must be same. Column name may be different. SELECT EMP_ID, DEPT_ID FROM DEPT_TBL1 UNION SELECT EMP_ID, DEPT_ID FROM DEPT_TBL2 This will retrieve all the rows from both the tables but only unique rows are retrieved. SELECT EMP_ID, DEPT_ID FROM DEPT_TBL1

UNION ALL SELECT EMP_ID, DEPT_ID FROM DEPT_TBL2

This will retrieve all the rows from both the tables including duplicate rows.

Performance Tuning DB2 Performance Tuning Techniques :

1. By using Indexes 2. By using DB2 utilities – RUNSTAT and REORG 3. By avoiding arithmetic operations in DB2 queries. 4. By using Joins

Index

90

OM Technologies

Index reduces the amount of memory to be scanned, thereby reducing the execution time and hence improves the DB2 performance.

DB2 Utilities

RUNSTAT utility : When it is run, all the statistics about the database objects are collected from DB2 catalog tables.

When RUNSTAT holds the latest information, OPTIMIZER can generate the BEST ACCESS PATH which will inturn improve the DB2 performance. REORG utility : When it is run, the tablespace memory is reorganized i.e., all the data pages are accumulated releasing the unused pages into the free memory.

When REORG reorganizes the data in the tablespace, the amount of memory to be scanned reduces, thereby improving the DB2 performance .

Using JOINs

Normal Query : SELECT EMP_ID, DEPT_ID, DEPT_NUM, DEPT_NAME FROM EMP_TBL, DEPT_TBL WHERE DEPT_ID = DEPT_NUM AND EMP_SAL > 20000 This query retrieves the entire data from both the tables and then applies the WHERE condition.

Query using JOIN

91

OM Technologies

SELECT EMP_ID, DEPT_ID, DEPT_NUM, DEPT_NAME FROM EMP_TBL, JOIN DEPT_TBL ON DEPT_ID = DEPT_NUM WHERE EMP_SAL > 20000 This query retrieves only the filtered data satisfying the ON condition and then applies the WHERE condition.

Since the amount of data to be processed is less using JOINs as compared to normal query, DB2 performance will be good using JOINs.

92

OM Technologies

93

OM Technologies

94

OM Technologies

95

OM Technologies

96

OM Technologies

97

OM Technologies

98

OM Technologies

99

OM Technologies

100

OM Technologies

101

OM Technologies

102

OM Technologies

103

OM Technologies

TYPE: It specifies the type of map to be generated.

TYPE=MAP Only Physical map is generated.

104

OM Technologies

TYPE=DSECT Only Symbolic map is generated.

TYPE=&SYSPARM Both Physical & Symbolic maps are generated.

105

OM Technologies

106

OM Technologies

107

OM Technologies

108

OM Technologies

109

OM Technologies

110

OM Technologies

111

OM Technologies

112

OM Technologies

113

OM Technologies

114

OM Technologies

115

OM Technologies

116

OM Technologies

117

OM Technologies

118

OM Technologies

119

OM Technologies

120

OM Technologies

121

OM Technologies

122

OM Technologies

SDLC & Workflow

Software products are of two types :

1. Generic S/W product

2. Client-specific S/W product

To develop any S/W product, we follow SDLC.

SDLC is a standard methodology used to develop a Quality S/W product.

Workflows for a S/W developer :

1. Development activity - Developing a new S/W application from

scratch.

2. Production Support - Providing support to applications in client

region.

3. Maintenance activity - Modifying functionalities in existing

applications.

4. Enhancement activity- Adding new functionalities in existing

applications.

Phases in SDLC

Development Activity : Any new application has to follow the below phases

in SDLC to get a Quality product.

1. Requirements phase

2. Design phase

3. Build/CUT phase

4. Test phase

5. UAT (User Acceptance Test) phase

6. Implementation

Warranty Support / Post Implementation Support (optional)

123

OM Technologies

Requirement Phase

This is the first phase after the project is initiated.

In this phase, client gives a BRD (Business Requirements Document) to the Service

Provider.

BRD contains the following :

1. About the business process of the client.

2. About the existing applications on which the new application is dependent.

3. About the current business requirements.

Once the BRD is received, analysis is conducted at the Service provider end. Once the

requirements are clearly understood by the service provider, an analysis document is

prepared and sent to client for review. Once client is satisfied with the analysis

document, he gives a sign-off to the Requirements phase.

This analysis is required to ensure Service provider has understood all the requirements or

not.

Design Phase

This is the second phase after the Requirements phase.

In this phase, the business requirements are converted into technical requirements i.e.,

HLD and LLD documents are prepared.

HLD (High Level Design) : This document provides a high level overview of each process

in the application.

Once HLD is signed-off, LLD is prepared.

124

OM Technologies

LLD (Low Level Design) : This document provides a detailed description of each

process in the application.

BUILD/CUT (Coding & Unit Testing)

This is the third phase after the Design phase.

In this phase, developer will be involved in the following tasks :

1. Preparing Unit test cases.

2. Coding programs, jobs, copybooks, BMS maps, etc.

3. Preparing test data for unit testing.

4. Unit testing – Testing of individual programs.

5. Preparing Unit test results.

TEST Phase

This is the fourth phase after the BUILD phase.

In this phase, tester will be involved in the following tasks :

1. Preparing System test cases.

2. System testing – Testing of whole application from end to end.

3. Preparing System test results.

UAT Phase

This is the fifth phase after the TEST phase.

In this phase, client/user will be involved in the following tasks :

125

OM Technologies

1. Preparing test scenarios.

2. User testing – Testing of whole application from end to end by client.

Implementation

This is the sixth phase after the UAT phase.

In this phase, the S/W components (programs, copybooks, jobs, procs, bms maps) are

moved from development into production region.

Warranty Support

This is optional i.e., based on the contract, warranty support is provided for the

developed application. This is also called as Post-implementation Support.

Till the client is used to the application and to resolve any abends, warranty support is

provided.

Production Support

Once the application is handed over to the client, the production support team

oversees the smooth running of business applications.

1. Monitoring batch cycles i.e., monitoring the smooth running of batch jobs.

2. Providing resolutions to the abends.

3. Escalating issues to operations team.

Maintenance Activity

126

OM Technologies

From time to time, the existing applications has to be modifed as per the changing

business rules and strategies.

Enhancement Activity

From time to time, new functionalities must be added to the existing applications for the

new business rules and strategies.

Full Material Salesforce

Documents

Transcript of Full Material Salesforce