Preservation of cache data following failover
    11.
    发明授权
    Preservation of cache data following failover 有权
    故障转移后保存缓存数据

    公开(公告)号:US07680982B2

    公开(公告)日:2010-03-16

    申请号:US11676634

    申请日:2007-02-20

    IPC分类号: G06F12/00

    摘要: In a data storage subsystem with disk storage and a pair of clusters, one set of DASD fast write data is in cache of one cluster and in non-volatile data storage of the other. In response to a failover of one of the pair of clusters to a local cluster, the local cluster converts the DASD fast write data in local cache to converted fast write data to prioritize the converted data for destaging to disk storage. In response to failure to destage, the local cluster allocates local non-volatile storage tracks and emulates a host adapter to store the converted fast write data by the local non-volatile storage, reconverting the converted fast write data of the non-volatile storage to local DASD fast write data stored in the local non-volatile storage and stored in the local cache storage.

    摘要翻译: 在具有磁盘存储和一对集群的数据存储子系统中,一组DASD快速写入数据位于一个集群的缓存中,而在另一个集群的非易失性数据存储中。 为了响应一对集群中的一个到本地集群的故障切换,本地集群将本地缓存中的DASD快速写入数据转换为转换的快速写入数据,以便将转换后的数据优先转发到磁盘存储。 为了应对未能到达的目的地,本地集群分配本地非易失性存储轨迹,并模拟主机适配器以存储由本地非易失性存储器转换的快速写入数据,将非易失性存储器的转换的快速写入数据重新转换为 本地DASD快速写入数据存储在本地非易失性存储器中并存储在本地缓存中。