What is Dsorg DA?
DSORG specifies the organization of the data set as physical sequential (PS), partitioned (PO), or direct (DA). If the data set is processed using absolute rather than relative addresses, you must mark it as unmovable by adding a U to the DSORG parameter (for example, by coding DSORG=PSU).
What is PO JCL?
DSORG can hold values PS (Physical Sequential), PO (Partitioned Organisation) and DA (Direct Organisation). When there is a need to replicate the DCB values of one dataset to another within the same jobstep or JCL, then it is specified as DCB=*. stepname.
What is PS in mainframe?
PS stands for physical sequential. Data in these files can be read sequentially by a program.
What is the organization type for partitioned dataset?
In a partitioned data set, independent groups of sequentially organized data, each called a member, reside in a direct access data set. The data set includes a directory that lists the location of each member. Partitioned data sets are often called libraries .
What is Recfm?
RECFM specifies the characteristics of the records in the data set as fixed-length (F), variable-length (V), ASCII variable-length (D), or undefined-length (U). Blocked records are specified as FB, VB, or DB. Spanned records are specified as VS, VBS, DS, or DBS.
What is GDG base in mainframe?
Generation Data Groups (GDGs) are group of datasets related to each other by a common name. The common name is referred as GDG base and each dataset associated with the base is called a GDG version. For example, MYDATA. URMI. SAMPLE.
What is the purpose of a partitioned data set?
A partitioned data set or PDS consists of a directory and members. The directory holds the address of each member and thus makes it possible for programs or the operating system to access each member directly.
What is Recfm FBA?
RECFM is short for record format. F represents fixed length records, unblocked. FB represents fixed length records, blocked. Blocking stores multiple records in a disk block, while the unblocked format stores one record in a disk block.
What is Recfm in mainframe?
What is the difference between GDG base and GDG generation?
Generation Data Groups (GDGs) are group of datasets related to each other by a common name. The common name is referred as GDG base and each dataset associated with the base is called a GDG version.
What is scratch and Noscratch in GDG?
noscratch is given when you want delete your oldest version of gdg member logically not physically. noempty is given when you want to repalce your new veresion with oldest version. scratch is given when you want delete your oldest version of gdg member physically not logically.
What are the advantages of data partitioning?
Database partitioning also gives us the following advantages: Improves query performance and manageability. Simplifies common administration tasks. Acts as a key tool for building systems with extremely high availability requirements.