How do I migrate an ASM disk to another server?
From all nodes Copy the pfiles from the existing system for ASM and the database to new server. Dismount diskgroups from old server and mount the physical devices on the new server. Verify that you can see the disks on the new server. Startup ASM on new server.
What are ASM disks?
Automatic Storage Management (ASM) is an integrated, high-performance database file system and disk manager. ASM groups the disks in your storage system into one or more disk groups. You manage a small set of disk groups and ASM automates the placement of the database files within those disk groups.
Why is ASM useful?
ASM aims to simplify the management of database datafiles, control files and log files. To do so, it provides tools to manage file systems and volumes directly inside the database, allowing database administrators (DBAs) to control volumes and disks with familiar SQL statements in standard Oracle environments.
How do I increase my ASM rebalance power?
How To Change ASM Rebalance Power of an Ongoing Operation
- Drop/ADD ASM disks.
- Check the rate of rebalance.
- Change the Rebalance Power.
- Check the Progress of the Rebalance Operation.
- Check the rbal Processes Spawned at the OS.
- Check status once removal finish.
How do I manually rebalance ASM Diskgroup?
You can manually rebalance the files in a disk group using the REBALANCE clause of the ALTER DISKGROUP statement. This would normally not be required, because Oracle ASM automatically rebalances disk groups when their configuration changes.
What are the three basic elements of ASM chart?
Following are the three basic components of ASM charts.
- State box.
- Decision box.
- Conditional output box.
What are the advantages of ASM over state diagram?
The ASM diagram is like a state diagram but more structured and, thus, easier to understand. An ASM chart is a method of describing the sequential operations of a digital system.
What is difference between ASM and FSM?
The condition expression contains one or more inputs to the FSM (Finite State Machine). An ASM condition check, indicated by a diamond with one input and two outputs (for true and false), is used to conditionally transfer between two State Boxes, to another Decision Box, or to a Conditional Output Box.
Which box of ASM chart has two or more exit path?
A decision box is a diamond shape box. The decision box has one entry and two exit paths depends upon the whether the input condition is true or false. The input condition to be tested is written inside the diamond box.
How to migrate ASM disk groups to another storage online?
1. Finally, you can remove the old disks from the disk group. The query syntax to remove the old disks is as follows: 2. Then wait until the rebalance operation completes: 3. Done, your ASM diskgroups and database have been migrated to the new storage.
How to transfer ASM file from one server to another?
But transfering file between asm diskgroups of different servers will be a tricky one. There are two methods to do it. 1. Using cp command of asmcmd 2. Using DBMS_FILE_TRANSFER package 1. Using cp command of asmcmd asmcmd cp +B2CWMARC/EXPDUMP/test.dmp sys/oracle@target-host.+ASM1:+NEWTST/TESTDB2/TEMPFILE/test1.dbf
How do I remove a disk from my ASM?
The command to remove the disk will vary. In Migration of ASM Disk, to add a disk to the ASM we use the OS Level name of the disk, whereas while dropping / removing a disk from ASM we should specify the Database level name of the Disk. This we can get it by querying the view v$asm_diskgroup.
How to move ASM storage to New RAC servers?
According to MOS note 884325.1 “How to Move ASM Storage to New RAC Servers” this should be really easy: Perform software only install on new server and then patch to desired level. If you currently have seperate home for ASM and database then you will need to perform 2 software only installs.