log tape write ahead (LTWA)

In IMS/VS, an option that ensures that a data base log record for a data change is written to the system log before the changed data is written to the data base.; 虛存信息管理系統(IMS/VS)中的一種任選功能,確保修改的數據寫入數據庫之前把有關該數據 修改的數據庫運行記錄寫進系統的運行記錄中去。