Find 'em, Fix 'em / Investigation and Planning /Plan!Plan!Plan!/Applications

### What about VSAM?

If you have two-digit years in the record keys in a KSDS, you can write a program to read the dataset and write a new, replacement, dataset with a key longer by two bytes and primed with "19" as the century.

#### On MVS and OS/390

Currently VSAM data sets can be cataloged in either VSAM catalogs or ICF catalogs. However, the use of the VSAM catalog will not be supported for access to data sets (meaning it will not be able to function) after December 31, 1999. If you are using VSAM catalogs, you need to consider migration to ICF catalogs. This should not wait too long as the latest expiration date specifiable in a VSAM catalog is December 31, 1999.

#### On VSE

VSE supports only VSAM catalogs (no ICF catalogs); these have been upgraded for the year 2000. But if you are migrating from VSE to MVS (or OS/390), implement ICF catalogs and and eliminate VSAM catalogs as part of the migration to have continued access to these datasets after 31 December 1999.

#### On MVS (or OS/390) and VM

If you share data between MVS and VM systems by using VSAM catalogs, you are using VSE/VSAM, which does not support ICF catalogs. ICF catalogs are required after 31 December 1999.