To support all the greatest ASM cluster file system functionality in Oracle Database 11g Release 2, Oracle provides set of command-line tools available for all Unix and Windows platforms. Here’s a summary of all the available commands:
acfsdbg Debugs an Oracle ACFS file system.
acfsutil info Displays various Oracle ACFS file system information.
acfsutil registry Registers an [...]
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[root@rac9 bin]# ./acfsload start -s
[root@rac9 bin]# lsmod |grep -i ora
oracleacfs 781476 0
oracleadvm 212736 0
oracleoks 224864 2 oracleacfs,oracleadvm
oracleasm [...]
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Creating Volumes with the volcreate command
ASMCMD> volcreate -G lobdata -s 4g vol_lob2
Note:
You can not create a mirror or high redundancy volume on an external redundant disk group.
ASMCMD> volcreate -G lobdata -s 4g --redundancy mirror vol_lob2
ORA-15032: not all alterations performed
ORA-15471: volume redundancy incompatible with diskgroup redundancy (DBD ERROR: OCIStmtExecute)
Displaying volume information with the volinfo [...]
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As of Oracle Database 11g Release 2, we can now rename disk groups. Why is this important? There’s two great reason why I think this feature is really beneficial for lot of companies. First, companies who leverage hardware mirroring or triple mirroring technologies such as EMC Business Continuity Volumes (BCV) or Hitachi [...]
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Prior to Oracle Database 11g Release 2, you had to issue the following commands in sqlplus to mount and dismount a diskgroup:
SQL> alter diskgroup fra mount;
Diskgroup altered.
SQL> alter diskgroup fra dismount;
Diskgroup altered.
As of Oracle Database 11g Release 2, an easier and more SA friendly approach is provided with asmcmd:
ASMCMD> mount fra
Looking at the disk group [...]
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Guess what? As of Oracle Database 11g Release 2, we can create disk groups using the asmcmd command. Check out one of the new ways we can create a diskgroup using an XML file as a template. The mkdg ASMCMD command can accept an xml file as a parameter to create a [...]
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In another post, we learned how to exploit all the ASMCA GUI features. asmca can be invoked with the -silent option and can effectively become a great command line interface.
You can create disk groups with the ASMCA configuration tool (ASMCA) or asmcmd command line interface as shown in this blog entry:
New ways to [...]
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Earlier we created an ASM Volume and created Cluster File System. Let’s continue where we left off and do some maintenance.
From the ASM Cluster File System main screen (Click on the ASM Cluster File System Tab), we will click on the VOL_LOGFILE volume URL to see volume related information:
Click on the Edit button to [...]
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Earlier in another blog post, I wrote on the subtle differences in how to start Enterprise Manager Database Control (dbconsole) in Oracle Database 11g Release 2
Let’s login to the EM Database Control. Your URL to login should be something like this:
https://jin1:1158/em
Scroll to the bottom of the screen to the instances section. You will [...]
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Earlier we went through the exercise to create ASM Volumes and Cluster File Systems within ASM disk groups. Another great feature introduced in Oracle Database 11g Release 2 is the capability to create snapshot images of the ASM cluster file systems. Oracle allows up to 63 read-only snapshots of their file [...]
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