Kam C Ho

US Patent:

20130054887, Feb 28, 2013

Filed:

Aug 30, 2011

Appl. No.:

13/221802

Inventors:

Kam H. Ho - Daly City CA, US
Maya P. Pandya - San Jose CA, US

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

International Classification:

G06F 12/06

US Classification:

711111, 711E12078

Abstract:

When using virtually stored data sets, such as virtual storage access method (VSAM) data sets, while the data set is open (referred to as an open time) static data set characteristics and/or job parameters have been defined for the VSAM data set. In one approach, even after a data set is opened, a virtually stored control block structure for the data set may be modified, such as by providing a dynamic address space associated with the data set in order to interact with the data set in an environment which allows for a service block request to modify the control block structure, such that data set characteristics and/or job parameters for the data set may be modified during the open time of the data set.