What is ASMLib and its usage?

ASMLib is an optional support library for the Automatic Storage Management feature of the Oracle Database. Automatic Storage Management (ASM) simplifies database administration and greatly reduces kernel resource usage (e.g. the number of open file descriptors).

How do I find my ASMLib version?

Run the ” uname -r ” command on your computer to determine your kernel version. The corresponding package has the name oracleasm- . Distributions based on Linux 2.4 kernels still use the 1.0.

How do I uninstall ASMLib?

Deinstalling Oracle ASMLIB On Oracle Database

1. Stop Oracle ASM and any running database instance:
2. Log in as root .
3. Stop the Oracle Restart stack:
4. Stop Oracle ASMLIB:
5. Remove the oracleasm library and tools RPMs:
6. Check if any oracleasm RPMs are remaining:
7. If any oracleasm configuration files are remaining, remove them:

What is KMOD Oracleasm?

The kmod-oracleasm module is the kernel driver required for the RHCK kernel and depends on the kernel version.

How do I create ASM disk on Linux 7?

Create Oracle Asm Disks on Oracle Linux

1. List Disks. [root@test01 dev]# ls sd* sda sda1 sda2 sdb sdb1 sdc sdd sde.
2. For 1. Disk. [root@test01 dev]# fdisk /dev/sdc.
3. For 2. Disk. [root@test01 dev]# fdisk /dev/sdd.
4. For 3. Disk. [root@test01 dev]# fdisk /dev/sde.
5. Calling ioctl() to re-read partition table. Syncing disks. List Disks.

How do I scan a disk on ASM?

How to Force ASM to Scan the Multipathed Device First using ASMLIB/oracleasm

1. Shutdown all (DB and ASM):
2. For backup, make a copy of your current /etc/sysconfig/oracleasm and /etc/sysconfig/oracleasm-_dev_oracleasm files.
3. As root user, save the file (oracleasm-_dev_oracleasm).
4. Restart oracleasm (as root):

How do I find my ASM disk details?

To identify the underlying physical device that the ASM disk point to, you can use the oracleasm querydisk command. The querydisk option will list the major and minor numbers that can be used to match the physical device. The following example was run on a virtual server hosting ASM and an Oracle database.

Where is Oracleasm located?

/etc/sysconfig/oracleasm
The Oracle ASMLib configuration file is located at /etc/sysconfig/oracleasm . It is a link to file /etc/sysconfig/oracleasm-_dev_oracleasm and tools actually read the later file. It contains all the startup configuration that the system administrator specified via the /etc/init.

What is Oracleasm init?

oracleasm init. Options are init to load and exit to unload. Use the init and exit options to load or unload the Oracle Automatic Storage Management library driver without restarting the system. Mark a disk for use with ASMLIB. oracleasm createdisk VOL1 /dev/sda1.

What is ASM disk group?

ASM eliminates the need for you to directly manage potentially thousands of Oracle database files. 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.

How do I create an ASM disk?

1. Create ASM disk. Get the Lun name from storage team. Lun Name – /dev/sda1.
2. Check the ASM Disks, Check the newly added disk, $sudo oracleasm listdisks.
3. Create the ASM Diskgroup. $sqlplus / as sysasm.
4. Check the newly added disk in ASM Diskgroup.

How do I create ASM disk in Linux VM?

If you need to install or upgrade, see Install Azure CLI.

1. Prepare the environment.
2. Install Oracle ASM.
3. Set up Oracle ASM.
4. Download and prepare Oracle Grid Infrastructure.
5. Prepare your local client and VM to run x11.
6. Install Oracle Grid Infrastructure.
7. Set up your Oracle ASM installation.
8. Create the database.

How do I mount an ASM disk in Linux?

Create Oracle Asm Disks on Oracle Linux

1. I will create three asm disks for GRID, FRA and DATA on Oracle Linux 6.3 on VMware. Asm disks will be GRID sdc, DATA sdd, FRA sde. Partition the Disks.
2. Configure OracleAsm on First Node.
3. Configure OracleAsm on Second Node.
4. Create Asm Disks on First Node.
5. Scan Asm Disks on Second Node.

Where is ASM disk path in Linux?

In Linux, ASMLib provides the wrapper for managing the ASM disks. To identify the underlying physical device that the ASM disk point to, you can use the oracleasm querydisk command. The querydisk option will list the major and minor numbers that can be used to match the physical device.

How do I check disk ASM in Linux?

How do I know if my database is ASM?

Also, you can check if you have an ASM instance running as a service. Check Windows Explorer to see if your datafiles are on the file system or can’t be seen(meaning you are on ASM). you could do that too…if the datafiles show up as DISK1 etc…with the sign prefix, it means you are on ASM…

How do I start Oracleasm?

Startup the Oracle ASM instance

1. Set the default Oracle_home environment variable to grid home where ASM is installed. EXPORT ORACLE_HOME=/up1/grid/12.2.0/dbhome_1.
2. Connect with sqlplus. SQLPLUS / as sysasm.
3. Start up the Oracle ASM Instance. SQL> STARTUP.
4. Check the spfile location or otherwise set it with.

Why do we need ASM?

How many disk groups are there in ASM?

two diskgroups
Thank you for your feedback! Oracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files.

How do I set up an ASM?

Is asmlib available on Red Hat 7?

Also Oracle has not been super fast to provide the ASMLib library for Red Hat 7, their initial communication was that they are not going even to provide it on Red Hat 7. Apparently now you can download the one of OEL 7 and install it on Red Hat 7.

What is asmlib in Linux?

ASMLib is an optional utility that can be used on Linux systems to manage Oracle ASM devices. ASM assists users in disk management by keeping track of storage devices dedicated to Oracle databases and allocating space on those devices according to the requests from Oracle database instances.

How do I obtain the other components of asmlib?

Red Hat Enterprise Linux 7 customers who use ASMLib can obtain the other two components (the ASMLib utilities package and the proprietary library package) at the locations (subject to change) described in the steps below. You need a Red Hat subscription to obtain the asmlib kernel module. The other 2 components are GPL.

Where is the oracleasm configuration file in asmlib?

ASMLib uses configuration file /etc/sysconfig/oracleasm, which is a link to file /etc/sysconfig/oracleasm-_dev_oracleasm. Tools read file /etc/sysconfig/oracleasm-_dev_oracleasm so make sure that it’s link from /etc/sysconfig/oracleasm is not broken.

https://www.youtube.com/watch?v=-aGmEB-iYX0