A VSAM file or data set whose records are loaded in key sequence and controlled by an index. Records are retrieved and stored by keyed access or by addressed access, and new records are inserted in key sequence by means of distributed free space. Relative byte address of records can change because of control interval or control area splits.; 一種VSAM文件或數(shù)據(jù)集,其記錄按關鍵字順序寫入并由索引控制。通過鍵存取或尋址存 取對其中的記錄進行檢索和存儲。借助于分布的自由空間,可以按鍵順序插入一個新的記 錄。由于控制間隔或控制區(qū)的分離,記錄的相對字節(jié)地址可以改變。