Enterprise IT Consultant Views on Technologies and Trends:

Mainframe


June 16, 2011  12:26 AM

Drilling deeper into VSAM RLS – focus on performance tuning



Posted by: Sasirekha R
CICS, IBM, Mainframe, performance, Storage, VSAM, zOS

Drilling deeper into VSAM RLS with focus on performance As discussed earlier, VSAM RLS that enables simultaneous access...

April 28, 2011  2:25 AM

Dynamic Scripting in CICS – brings best of both worlds



Posted by: Sasirekha R
CICS, cost saving, IBM, Java, Mainframe, script

Dynamic Scripting in CICS - brings best of both worlds The CICS Dynamic Scripting Feature Pack (optional product) seems to bring the best of both worlds - benefits of quickly developing scripted, Web 2.0 applications with simple and secured...


April 27, 2011  2:47 AM

Tweaking COBOL Compiler Options for Improved Performance



Posted by: Sasirekha R
COBOL, cost saving, IBM, Mainframe, performance

Tweaking COBOL Compiler Options for Improved Performance COBOL is still the most widely used language in mainframe - both for online transaction processing as well as massive batch processing. Even minor improvement of performance of repeatedly executing COBOL programs directly...


February 14, 2011  2:43 AM

Understanding Mainframe transaction processing – CICS



Posted by: Sasirekha R
CICS, IBM, Mainframe, transaction

Understanding Mainframe transaction processing - CICS (for non-mainframe personnel) CICS is IBM's online transaction processing facility - and WebSphere can be considered as an equivalent. The words transaction and task are used to describe units of work within...


February 14, 2011  2:38 AM

Mainframe z/OS Components



Posted by: Sasirekha R
High Availability, IBM, Mainframe, performance, virtual, zOS

Mainframe z/OS Components Mainframe operating system z/OS is a share-everything runtime environment that provides for resource sharing through its heritage of virtualization technology. z/OS gets work done by dividing it into pieces and giving portions of the job to various...


February 14, 2011  1:56 AM

Mainframe Clustering – Overview



Posted by: Sasirekha R
Cluster, IBM, Mainframe, Scalability, zOS

Mainframe Clustering Mainframe has three major clustering techniques: Basic Shared DASD, CTC rings, and Parallel Sysplex. Parallel Sysplex - is analogous in concept to a UNIX cluster - allow the customer to operate multiple copies of the operating system as a single system. This...


February 14, 2011  1:50 AM

Understanding Mainframe – Overview for non-mainframe personnel



Posted by: Sasirekha R
CICS, COBOL, cost saving, IBM, Mainframe, mainframe cost, virtual, Virtualized Server, zOS

Mainframe Overview with focus on Cost Savings Recently one of our Unix experts - focusing on IT optimization - came to me to get an understanding of Mainframe and like most IT people who have not worked in Mainframe had quite a few obsolete...


January 3, 2011  2:31 AM

Static / Dynamic Linking in CICS



Posted by: Sasirekha R
CICS, IBM, linking, Mainframe, performance

Static / Dynamic Linking in CICS

In CICS there are three ways of transferring control to a subprogram: 1. Using EXEC CICS LINK Command 2. Using Static COBOL call 3. Using Dynamic COBOL call The format of the LINK command in the calling program is: EXEC CICS LINK...


January 3, 2011  2:24 AM

Static / Dynamic Linking in IBM COBOL



Posted by: Sasirekha R
COBOL, IBM, linking, Mainframe, performance

Static / Dynamic Linking in IBM COBOL

Using linking, we can have one program call another program that is not contained in the source code of the calling program. Depending on the linkage options,  the object module of the calling program is linked with the object module of the...


October 10, 2010  4:54 AM

Understanding SRB, the possible key of zPrime (Neon vs. IBM Lawsuits)



Posted by: Sasirekha R
cost savings, IBM, Lawsuit, Mainframe, Neon, SRB, zAAP, zIIP, zPrime

Understanding SRB the possible key of zPrime - more known for Neon vs. IBM Lawsuits IBM mainframe specialty processors - zAAP and zIIP - cost significantly less compared to the General purpose processors and these "do not count" in software pricing calculations and ISV...


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