Dell EMC PowerPath for Linux 7.4 及次要版本安装和管理指南

对于 Symmetrix 阵列，PowerPath 设备 IO 统计信息默认已启用。可通过 powermt display options 命令查看。

[root@hostname ~]# powermt display options

        Show CLARiiON LUN names: true

        New lun probe interval: 120

        Path Latency Monitor: Off

        Performance Monitor: disabled

        Autostandby:  IOs per Failure (iopf): enabled
                      IOPF aging period     : 1 d
                      IOPF limit            : 1000
                      FPIN notification     : enabled
                      FPIN aging period     : 1 d

        存储
        System Class  Attributes
        ------------  ----------

        Symmetrix     periodic autorestore = on
        SCSI          reactive autorestore = on
                      status = managed
                      proximity based autostandby = on
                      proximity based autostandby threshold = default
                      path retry timeout = 5
                      all paths dead retry timeout = 10
                      auto host registration = enabled
                      device to array performance report = enabled

可使用下面的 powermt set 命令更改此设置：

[root@hostname ~]# powermt set device_perf_to_array_report={on|off} [class=<class>|all]