Method of removing unneeded data from DB2 logs and other data sets having displacement-dependent data

摘要

In a data set containing displacement-dependent data (e.g., data identified by relative byte address), such as a DB2 log data set, data that is determined to be unneeded or otherwise removable is overwritten with a compressible binary pattern such as a sequence of binary zeros. The resulting substitute data set can be compressed to occupy less storage space and require less time for data recovery.