The term Virtual Storage Access Method (VSAM) applies to both a data set type and the access method used to manage various user data types. As an access method, VSAM provides much more complex functions than other disk access methods. [ Read More ]
Archive for 一月, 2007
1. 创建一个GDG，包括base和model: //STEP1 EXEC PGM=IDCAMS//GDGMODEL DD DSN=ST023.TEST.GDGMDL, DISP=(NEW,CATLG,DELETE), SPACE=(TRK,(0)), DCB=(RECFM=FB,LRECL=80,BLKSIZE=4000) //SYSPRINT DD SYSOUT=*//SYSIN DD * DEFINE GDG (NAME(ST023.TEST.GDG) LIMIT(100) –THIS IS GDG BASE!–/* 2. 在GDG中创建DS： //STEP2 EXEC PGM=IEBGENER//SYSUT1 DD DSN=ST023.TEST.ORIGINAL,DISP=SHR//SYSUT1 DD DSN=ST023.TEST.GDG(+1), DISP=(NEW,CATLG,DELETE), SPACE=(TRK,(5,5)), DCB=ST023.TEST.GDGMDL //SYSPRINT DD SYSOUT=* 3. 删除GDG，删除其中的DS先： [ Read More ]
In z/OS, it is possible to catalog successive updates or generations of related data. They are called generation data groups (GDGs). 在z/OS里可以编目继承性的更新或相关数据的世代，他们叫做“世代”数据组。 Each data set within a GDG is called a generation or generation data set (GDS). A generation data [ Read More ]
