Dynamic Multipathing
Encyclopedia
In computer data storage technology field, dynamic multipathing (DMP) is a multipath I/O
enhancement technique that balances input/output
(I/O) across many available paths from the computer to the storage device to improve performance and availability. The name was introduced with Veritas Volume Manager
software.
The DMP utility does not take any time to switch over, although the total time for failover is dependent on how long the underlying disk driver retries the command before giving up.
See also: Multipath I/O implementations
Multipath I/O
In computer storage, multipath I/O is a fault-tolerance and performance enhancement technique whereby there is more than one physical path between the CPU in a computer system and its mass storage devices through the buses, controllers, switches, and bridge devices connecting them.A simple example...
enhancement technique that balances input/output
Input/output
In computing, input/output, or I/O, refers to the communication between an information processing system , and the outside world, possibly a human, or another information processing system. Inputs are the signals or data received by the system, and outputs are the signals or data sent from it...
(I/O) across many available paths from the computer to the storage device to improve performance and availability. The name was introduced with Veritas Volume Manager
Veritas Volume Manager
The Veritas Volume Manager, VVM or VxVM is a proprietary logical volume manager from Veritas . It is available for Windows, AIX, Solaris, Linux, and HP-UX. A modified version is bundled with HP-UX as its built-in volume manager...
software.
The DMP utility does not take any time to switch over, although the total time for failover is dependent on how long the underlying disk driver retries the command before giving up.
See also: Multipath I/O implementations