oracle acfs snap 恢复,删除ACFS系统碰到的问题
首先嘗試UMOUNT文件系統：
[oracle@xsh-server1 ~]$ df -k
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00 435653856 192338280 220828536 47% /
/dev/sda1 101086 16919 78948 18% /boot
tmpfs 65968984 195784 65773200 1% /dev/shm
/dev/asm/acfsdgvol1-57624951296 165746644 459204652 27% /backup
[root@xsh-server1 ~]# umount -t
acfs /backup
在節點2上執行同樣的UMOUNT操作：
[root@xsh-server2 asm]# umount -t
acfs /backup/
在節點1上取消acfs的注冊信息：
[root@xsh-server1 ~]# acfsutil
registry -m /dev/asm/acfsdgvol1-57
/backup
[root@xsh-server1 ~]# acfsutil registry -d /dev/asm/acfsdgvol1-57
acfsutil registry: successfully removed ACFS volume /dev/asm/acfsdgvol1-57 from
Oracle Registry
但是隨后刪除acfs文件系統的時候出現了錯誤：
[root@xsh-server1 ~]# acfsutil rmfs
/dev/asm/acfsdgvol1-57
acfsutil rmfs: ACFS-00511: /dev/asm/acfsdgvol1-57 is mounted on at least one
node of the cluster.
acfsutil rmfs: ACFS-03014: file system not removed
由于文件系統無法刪除，是的VOLUME同樣無法刪除：
[root@xsh-server1 ~]# su - grid
[grid@xsh-server1 ~]$ sqlplus / as sysasm
SQL*Plus: Release 11.2.0.2.0
Production on Thu Aug 11 11:15:02 2011
Copyright (c) 1982, 2010, Oracle.
All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options
SQL> SELECT GROUP_NUMBER,
VOLUME_NAME, SIZE_MB, STATE, USAGE, VOLUME_DEVICE, MOUNTPATH
2 FROM V$ASM_VOLUME;
GROUP_NUMBER VOLUME_NAME SIZE_MB
STATE USAGE VOLUME_DEVICE MOUNTPATH
------------ ----------- ------- ------- ----- ----------------------
----------
4 ACFSDGVOL1 610304 ENABLED
ACFS /dev/asm/acfsdgvol1-57 /backup
SQL> SELECT GROUP_NUMBER, NAME
FROM V$ASM_DISKGROUP WHERE GROUP_NUMBER = 4;
GROUP_NUMBER NAME
------------ ------------------------------
4 ACFSDG
SQL> ALTER DISKGROUP ACFSDG
DISABLE VOLUME ACFSDGVOL1;
ALTER DISKGROUP ACFSDG DISABLE VOLUME ACFSDGVOL1
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15468: volume 'ACFSDGVOL1' in diskgroup 'ACFSDG' is currently being
accessed
嘗試在ASMCMD中操作，同樣無法刪除VOLUME：
[grid@xsh-server1 ~]$ asmcmd
ASMCMD> volinfo -a
Diskgroup Name: ACFSDG
Volume Name: ACFSDGVOL1
Volume Device: /dev/asm/acfsdgvol1-57
State: ENABLED
Size (MB): 610304
Resize Unit (MB): 256
Redundancy: UNPROT
Stripe Columns: 4
Stripe Width (K): 128
Usage: ACFS
Mountpath: /backup
ASMCMD> voldelete -G ACFSDG
ACFSDGVOL1
ORA-15032: not all alterations performed
ORA-15468: volume 'ACFSDGVOL1' in diskgroup 'ACFSDG' is currently being
accessed (DBD ERROR: OCIStmtExecute)
ASMCMD> voldisable -a
ORA-15032: not all alterations performed
ORA-15468: volume 'ACFSDGVOL1' in diskgroup 'ACFSDG' is currently being
accessed (DBD ERROR: OCIStmtExecute)
ASMCMD> quit
[grid@xsh-server1 ~]$ exit
嘗試各種方法，都無法以常規的方法刪除ACFS文件系統和ASM中創建的VOLUME，沒有辦法，最終只是使用強制的方法來刪除：
[grid@xsh-server1 ~]$ id
uid=1300(grid) gid=1000(oinstall) groups=1000(oinstall),1200(dba)
context=user_u:system_r:unconfined_t
[grid@xsh-server1 ~]$ sqlplus / as sysasm
SQL*Plus: Release 11.2.0.2.0
Production on Thu Aug 11 12:59:35 2011
Copyright (c) 1982, 2010, Oracle.
All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options
SQL> set pages 100 lines 120
SQL> SELECT GROUP_NUMBER, NAME FROM V$ASM_DISKGROUP;
GROUP_NUMBER NAME
------------ ------------------------------
1 CRSDG
2 DATADG
3 FRADG
4 ACFSDG
SQL> DROP DISKGROUP ACFSDG;
DROP DISKGROUP ACFSDG
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15053: diskgroup "ACFSDG" contains existing files
SQL> DROP DISKGROUP ACFSDG INCLUDING CONTENTS;
DROP DISKGROUP ACFSDG INCLUDING CONTENTS
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15027: active use of diskgroup "ACFSDG" precludes its dismount
SQL> DROP DISKGROUP ACFSDG FORCE INCLUDING CONTENTS;
DROP DISKGROUP ACFSDG FORCE INCLUDING CONTENTS
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15230: diskgroup 'ACFSDG' does not require the FORCE option
SQL> ALTER DISKGROUP ACFSDG DISMOUNT;
ALTER DISKGROUP ACFSDG DISMOUNT
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15027: active use of diskgroup "ACFSDG" precludes its dismount
SQL> ALTER DISKGROUP ACFSDG DISMOUNT FORCE;
Diskgroup altered.
SQL> DROP DISKGROUP ACFSDG;
DROP DISKGROUP ACFSDG
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15001: diskgroup "ACFSDG" does not exist or is not mounted
SQL> DROP DISKGROUP ACFSDG FORCE INCLUDING CONTENTS;
DROP DISKGROUP ACFSDG FORCE INCLUDING CONTENTS
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15073: diskgroup ACFSDG is mounted by another ASM instance
利用DISMOUNT
FORCE的選項，終于將磁盤組ACFSDG卸載，由于另外的ASM實例還加載這個磁盤組，因此這個磁盤組暫時還不能刪除。
登錄另外的實例，執行DISMOUNT操作：
[root@xsh-server2 dev]# su - grid
[grid@xsh-server2 ~]$ sqlplus / as sysasm
SQL*Plus: Release 11.2.0.2.0
Production on Thu Aug 11 13:11:55 2011
Copyright (c) 1982, 2010, Oracle.
All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options
SQL> set pages 100 lines 120
SQL> select group_number, name, state from v$asm_diskgroup;
GROUP_NUMBER NAME STATE
------------ ------------------------------ -----------
1 CRSDG MOUNTED
2 DATADG MOUNTED
3 FRADG MOUNTED
4 ACFSDG MOUNTED
SQL> alter diskgroup acfsdg
dismount;
Diskgroup altered.
下面會到第一個節點，再次執行刪除操作：
SQL> DROP DISKGROUP ACFSDG;
DROP DISKGROUP ACFSDG
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15001: diskgroup "ACFSDG" does not exist or is not mounted
SQL> DROP DISKGROUP ACFSDG FORCE INCLUDING CONTENTS;
Diskgroup dropped.
SQL> SELECT GROUP_NUMBER, NAME
FROM V$ASM_DISKGROUP;
GROUP_NUMBER NAME
------------ ------------------------------
1 CRSDG
2 DATADG
3 FRADG
SQL> EXIT
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 -
64bit Production
With the Real Application Clusters and Automatic Storage Management options
[grid@xsh-server1 ~]$ df -k
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00 435653856 192353508 220813308 47% /
/dev/sda1101086 16919 78948 18% /boot
tmpfs 65968984 19578465773200 1% /dev/shm
最后利用ORACLEASM刪除對應的設備：
[grid@xsh-server1 ~]$ su -
Password:
[root@xsh-server1 ~]# oracleasm listdisks
VOL1
VOL2
VOL3
VOLACFS
[root@xsh-server1 ~]# oracleasm deletedisk VOLACFS
Clearing disk header: done
Dropping disk: done
在另外的節點執行檢查ASM磁盤組和ORACLEASM設備，確認節點1上的操作在兩個節點上都已經生效：
SQL> select group_number, name,
state from v$asm_diskgroup;
GROUP_NUMBER NAME STATE
------------ ------------------------------ -----------
1 CRSDG MOUNTED
2 DATADG MOUNTED
3 FRADG MOUNTED
SQL> EXIT
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 -
64bit Production
With the Real Application Clusters and Automatic Storage Management options
[grid@xsh-server2 ~]$ exit
logout
[root@xsh-server2 dev]# oracleasm
scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Cleaning disk "VOLACFS"
Scanning system for ASM disks...
[root@xsh-server2 dev]# oracleasm listdisks
VOL1
VOL2
VOL3
雖然最終通過強制的方式刪除了ACFS文件系統和對應的磁盤組，但是這種強制的方式很可能在操作系統級別上還留下一下沒有清除的信息。
顯然ACFS這項新技術還存在很多的bug，而且在處理這個問題時也發現，即使是在metalink上，關于ACFS的信息也非常少，雖然存在一個和當前幾乎完全一樣的問題，但是并沒有下文，Oracle也沒有給出任何解決的方法。
如果打算在產品環境中使用ACFS，還是要經過大量的測試才行。
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