Understanding ASM (5) ASM tool: asmcmd

[oracle@localhost ~]$ asmcmd help=y        commands:         --------          cd        du        find        help        ls        lsct        lsdg        mkalias        mkdir        pwd        rm        rmalias

① List Directory Information

ASMCMD> lsDATA/ASMCMD> ls -alState    Type    Rebal  Unbal  NameMOUNTED  NORMAL  N      N      DATA/ 

 

② Alias

ASMCMD> ls -alType       Redund  Striped  Time             Sys  NameONLINELOG  MIRROR  FINE     NOV 04 19:00:00  Y    none => group_4.256.798491239ASMCMD> mkalias group_4.256.798491239 redo_log_group_3.logASMCMD> ls -alType       Redund  Striped  Time             Sys  NameONLINELOG  MIRROR  FINE     NOV 04 19:00:00  Y    +DATA/ORCL/ONLINELOG/redo_log_group_3.log => group_4.256.798491239                                             N    redo_log_group_3.log => +DATA/ORCL/ONLINELOG/group_4.256.798491239

 

③ View space

ASMCMD> duUsed_MB      Mirror_used_MB     89                 179ASMCMD> lsdgState    Type    Rebal  Unbal  Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  NameMOUNTED  NORMAL  N      N         512   4096  1048576       701      358              101             128              0  DATA/

 

④ Search for files

ASMCMD> find +DATA redo*+DATA/ORCL/ONLINELOG/redo_log_group_3.log

 

⑤ Display the connection between ASM and database instances

ASMCMD> lsct

 

⑥ Delete an object

ASMCMD> rm  +DATA/ORCL/ONLINELOG/redo_log_group_3.log