Device Mapper Multipath（DM-Multipath）
现在的Linux系统中,很多都会使用系统自带的multipath多路径软件,在以前的版本中,我们一般通过multipath+udev或者multipath+rc.local来实现多路径和权限设置,而在redhat 5.3及其以后的版本中multipath就直接可以实现多路径聚合、设备持久化、用户组设置
补充Linux 6.x中udev设置所属组和权限
对于linux 6.x,multipath不能设置磁盘所属组和权限,可以通过udev进行实现,类似配置如下vim /etc/udev/rules.d/99-dm-permissions.rules
ENV{DM_NAME}=="DATA_a", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DATA_b", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DATA_c", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_d", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_e", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_f", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_g", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_h", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_i", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_j", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_k", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_l", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_m", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_n", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_o", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_p", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_q", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_r", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_s", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_t", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_u", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_v", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="DBDATA_w", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="FRA_1", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="FRA_2", GROUP="asmadmin", OWNER="grid", MODE="0660" ENV{DM_NAME}=="FRA_3", GROUP="asmadmin", OWNER="grid", MODE="0660"