VSAM ⭐ Featured
👁 0

Q: What is VSAM catalog?

Answer:
ICF catalog stores VSAM metadata. Aliases point to catalogs. DEFINE USERCATALOG creates. LISTCAT shows entries. Recovery important - losing catalog is disaster. BCS (Basic Catalog Structure) and VVDS on volume.
catalog icf metadata
DB2 ⭐ Featured
👁 0

Q: What is DB2 catalog?

Answer:
Catalog tables describe DB2 objects. SYSIBM.SYSTABLES for tables, SYSIBM.SYSCOLUMNS for columns, SYSIBM.SYSINDEXES for indexes. Query catalog for metadata. Read-only except through DDL. Essential for documentation and analysis.
catalog sysibm metadata