What is multipathing in Linux?
Multipathing allows the combination of multiple physical connections between a server and a storage array into one virtual device. This can be done to provide a more resilient connection to your storage (a path going down will not hamper connectivity), or to aggregate storage bandwidth for improved performance.
What is multipath in Oracle?
Multipathing is the technique of creating more than one physical path between the server and its storage devices. Oracle VM supports multipath I/O out of the box. Oracle VM Servers are installed with multipathing enabled because it is a requirement for SAN disks to be discovered by Oracle VM Manager.
What is multipathing in ASM?
Multipathing is a software technology implemented at the operating system device driver level. With Oracle ASM, you can ensure the discovery of a multipath disk by setting the value of the ASM_DISKSTRING initialization parameter to a pattern that matches the pseudo devices that represents the multipath disk.
Why is multipathing important?
Linux multipathing provides connection fault tolerance and can provide load balancing across the active connections. When multipathing is configured and running, it automatically isolates and identifies device connection failures, and reroutes I/O to alternate connections.
How do I configure Oracleasm?
updating the configuration file /etc/sysconfig/oracleasm. Creating ASM disk groups….1. Install and configure ASMLIB software
- An open source (GPL) kernel module package: kmod-oracleasm.
- An open source (GPL) utilities package: oracleasm-support.
- A closed source (proprietary) library package: oracleasmlib.
How do I add more space to ASM Diskgroup?
Grow disk group through ASM: This command is run from the database node as sysasm: alter diskgroup DATA_DB03P resize all rebalance power 32; select * from gv$asm_operation; Once this completes, you are done!
What is multipathing in VMware?
Multipathing is a technique that lets you use more than one physical path that transfers data between the host and an external storage device. In case of a failure of any element in the SAN network, such as an adapter, switch, or cable, ESXi can switch to another physical path, which does not use the failed component.