Load Balancing; Host Lu Number; Intermittent Error; Kvm (Kernel-Based Virtual Machine) - Hitachi XP P9500 User Manual

(See also: LU, host LU number, host device)

host LU number

A number assigned to a host LU. The host LU number is part of a path name.
(See also: host LU, path name)
hypervisor
Software that enables host virtualization.
I

intermittent error

An error that occurs irregularly due to, for example, a loose cable connection.
IP-SAN (Internet Protocol - Storage Area Network)
A data transfer network that connects hosts and storage systems by using the iSCSI
standard.
K

KVM (Kernel-based Virtual Machine)

A mechanism that uses the Linux kernel itself as a hypervisor. KVM uses QEMU to
control guest OSs.
(See also: QEMU)
L

LDEV (Logical Device)

A combination of the storage system's product name, serial number, and an internal LU.
HDLM uses this value to identify a particular LU.

load balancing

Functionality for distributing the load across the paths that access each area within an
LU. To distribute loads, load balancing uses multiple paths to perform I/O operations.
HDLM uses the following six algorithms for load balancing:
- The Round Robin algorithm
- The Extended Round Robin algorithm
- The Least I/Os algorithm
- The Extended Least I/Os algorithm
- The Least Blocks algorithm
- The Extended Least Blocks algorithm
# A B C D E
Glossary-4
F G H I J K
Hitachi Dynamic Link Manager User Guide (for Linux(R))
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