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sejjobs · Beginner Joined: 30 Jul 2004 Posts: 15 Topics: 12

Hi

What does a Catalog mean and how it is different from Integrated Catalog Facility and what does a Integrated Catalog Facility mean and what is user catalog what is the use of user catalog

thanking you
sej

kolusu · Posted: Mon Oct 11, 2004 5:33 am Post subject:

sejjobs,

Integrated Catalog Facility is a facility by which VSAM data set volume-related fields are separated from the catalog and maintained in the VVDS on the volume on which the data set resides.

catalog is a a directory of files and libraries, with reference to their locations. The collection of all data set indexes that are used by the control program to locate a volume containing a specific data set.

Hope this helps...

Cheers

kolusu
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Kolusu
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Bill Dennis · Posted: Mon Oct 11, 2004 10:28 am Post subject:

Every system has a MASTER catalog where certain system dataset (eg. SYS1.LINKLIB) entries must be found. To reduce update activity in the master catalog, one or more USER catalogs are created. Datasets are directed to a user catalog based on the high-level qualifiers of the dataset name (eg. BOB ). An ALIAS entry in the master catalog for "BOB" relates to the actual user catalog name.

sejjobs · Beginner Joined: 30 Jul 2004 Posts: 15 Topics: 12

Hi Kolusu and Bill

Thanks for the reply and it helped me lot

thanking you

sej