公开(公告)号：US5446871A

公开(公告)日：1995-08-29

申请号：US36017

申请日：1993-03-23

申请人： Robert W. Shomler ,  James E. McIlvain

发明人： Robert W. Shomler ,  James E. McIlvain

IPC分类号： G06F12/00 ,  G06F11/20 ,  G06F13/00 ,  G11C29/00 ,  G06F11/34

CPC分类号： G06F11/2082 ,  G06F11/2064 ,  G11C29/74

摘要： A method and system for asynchronous remote data duplexing at a distant location from copies based at a primary site storage subsystem, which copying is non-disruptive to executing applications, and further in which any data loss occasioned by losses in flight or updates never received at the time of any interruption between the primary and remote sites are accounted for at the remote site. The method assigns a token and unique sequence number responsive to each write operation at the primary site, and sends the tokens+numbers and data updates to the remote site. The method relies upon the sequence number to establish a sequency and define gaps therein to ascertain missing updates.

摘要翻译： 一种用于远程位置处的异步远程数据双工的方法和系统，不包括基于主站点存储子系统的复制，所述复制对于执行应用程序是无中断的，并且进一步地，由于飞行或更新中的损失而导致的任何数据丢失从未在 主站点和远程站点之间任何中断的时间在远程站点进行计费。 该方法响应于主站点上的每个写入操作分配令牌和唯一序列号，并将令牌+号码和数据更新发送到远程站点。 该方法依赖于序列号来建立序列，并在其中定义差距以确定缺失的更新。