logical group number (LGN)

In MVS, an identifier of a logical group.It is the base value used by the real storage manager and the auxiliary storage manager to compute a logical page identifier (LPID). For example, all pages of a virtual I/O data set may be represented by a single LGN.; 在IBM的操作系統MVS中,一種邏輯組的標識符, 它是實存管理程序和輔存管理程序計算邏輯頁面標識符(LPID)的基值。例如,一個虛擬輸入 輸出數據集的全部頁面可以用一個LGN表示。