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Continue reading →: Public Cloud
Public Cloud is an IT model where services and infrastructure are managed by a third-party provider and shared with multiple organizations using the public Internet. That means it offloads much of the physical responsibility of operating a data center to a third party. This helps to abstract away much of…
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Continue reading →: Private Cloud
When Organizations uses private dedicated environments, i.e. organization is running an environment where the sole tenant is the company itself. The company is ultimately responsible for maintaining the hardware, software, and networking infrastructure. On premises servers are also referred to as private clouds, just that on premise servers runs in…
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Continue reading →: How COMP-3 Saves Space-In COBOL
Having a clear understanding of Zoned Decimal format is essential before diving into Packed Decimal (COMP-3) format in COBOL. In Packed Decimal format, each byte’s zone portion stores the next numeric digit, allowing two digits to be packed into a single byte—hence the name packed decimal. Each byte in a…
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Continue reading →: What is Zoned Decimal In COBOL
The two computer codes mostly used for internal binary representation are EBCDIC and ASCII. Mainframe uses EBCDIC coding system. In EBCDIC, each byte consists of eight bits which are subdivided into two 4 bit segment; The Zone part(First 4 bits) and the Digit part(last 4 bits).For Reference the following table…
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Continue reading →: Buffer Pool In DB2
In IBM Db2 databases, data is physically stored on disk across multiple files. Each file is divided into fixed-size blocks known as pages, which serve as the smallest unit of data exchange between disk storage and main memory. To optimize DB2 database performance, it is critical to keep as many…
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Continue reading →: Catalog Tables In DB2
The word catalog signifies a list of items. When DB2 is installed, DB2 creates a set of tables which stores the information about DB2 objects as and when it gets created/updated, like definition of the objects, security information, statistical information etc. The information of every object known and available to…
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Continue reading →: Identity Column in DB2
This identifier is a number that is updated sequentially as new records are added. In DB2, this feature will automatically generate the values. The values for an identity column can be generated by the Db2 database manager in two ways using the keywords ALWAYS or BY DEFAULT. When using GENRATED ALWAYS keyword,…
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Continue reading →: Database Objects in IBM DB2
A database is an organized collection of related objects. Broadly the database objects can be classified as :TablesAliasesSynonymsViewsIndexesTable spacesIndex spacesDatabasesStorage groups. In this post we will see types of tables. In subsequent posts, we will visit the other DB objects Tables: A table is an unordered set of data records.…
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Continue reading →: What is SMS in mainframe ? -Understanding z/OS Storage Management Subsystem (SMS)
Introduction: The Storage Management Subsystem (SMS) automates the use of storage for data sets. The system is not aware of how much space a dataset will need, where it will be stored(Disk or Tape) ,what will be its record format and other details. Z/OS storage team need to decide whether…
