log write-ahead(LWA)

In IMS/VS, the process of writing records of completed operations to the write-ahead data set before entering them in the on-line log data set.; 在虛存信息管理系統(IMS/VS)中,在寫完整的運行記錄到聯機登錄數據集之前,先把它們寫到超前寫數據集中的過程。