Method and apparatus for rapid data copying using reassigned backing
pages
    1.
    发明授权
    Method and apparatus for rapid data copying using reassigned backing pages 失效
    使用重新分配的支持页快速进行数据复制的方法和装置

    公开(公告)号:US5394539A

    公开(公告)日:1995-02-28

    申请号:US276512

    申请日:1994-07-15

    IPC分类号: G06F12/12 G06F12/00 G06F13/00

    摘要: A data processing system, having virtual addressing capability, has a real storage manager to associate virtual storage locations with real storage by accessing page tables to determine the locations of "backed" virtual storage pages in central, expanded, or auxiliary storage. The real storage manager accepts requests to copy ranges of virtual storage from one virtual storage range to another, and, in so doing, uses the page tables to effectively perform the copying by reassigning backed pages from the source range to the target range. Having been reassigned to the target range, the backed pages are artificially aged by increasing the unreferenced interval count (UIC), so that the backed pages in the target range will be likely candidates for page stealing.

    摘要翻译: 具有虚拟寻址功能的数据处理系统具有真实的存储管理器,以通过访问页表来将虚拟存储位置与真实存储相关联,以确定中央,扩展或辅助存储器中“备份的”虚拟存储页的位置。 真正的存储管理器接受将虚拟存储范围从一个虚拟存储范围复制到另一个虚拟存储范围的请求,并且通过重新分配从源范围到目标范围的支持的页面,可以使用页表来有效地执行复制。 已重新分配到目标范围后,通过增加未引用的间隔计数(UIC),将后台的页面进行人工老化,以使目标范围内的背页可能成为页面窃取的候选者。

    Method and system for capturing and controlling access to information in
a coupling facility
    3.
    发明授权
    Method and system for capturing and controlling access to information in a coupling facility 失效
    用于捕获和控制耦合设备中信息访问的方法和系统

    公开(公告)号:US5630050A

    公开(公告)日:1997-05-13

    申请号:US146647

    申请日:1993-11-01

    摘要: A method and system for capturing and controlling access to information in a data processing system is provided. The data processing system includes one or more operating systems coupled to a coupling facility. When one or more operating systems lose communication with the coupling facility, a surviving operating system captures some or all of the information in the coupling facility, including that information associated with the failed operating system(s). In order to capture the information when a system fails or at any other time, the information in the coupling facility is serialized, thereby preventing all access to the information except for those commands capturing the information. While the information is serialized, requests for the information are queued and then re-driven once serialization is released. If an operating system loses communication with the coupling facility during the creation of a dump, another operating system will continue the dump.

    摘要翻译: 提供了一种用于捕获和控制对数据处理系统中的信息的访问的方法和系统。 数据处理系统包括耦合到耦合设备的一个或多个操作系统。 当一个或多个操作系统失去与耦合设备的通信时,幸存的操作系统捕获耦合设施中的部分或全部信息,包括与故障操作系统相关联的信息。 为了在系统发生故障或在任何其他时间捕获信息,耦合设施中的信息被序列化,从而防止除了捕获信息的那些命令之外的所有信息的所有访问。 当信息被序列化时,信息的请求被排队,然后一旦序列化被释放就被重新驱动。 如果操作系统在创建转储期间与耦合设备断开通信,则另一个操作系统将继续转储。