HP Hitachi Dynamic Link Manager Software User Manual
Page 698
host device name
A name assigned to a host device. A name of the logical device file for an HDLM device
is assigned to a host device name.
host LU
An LU that a host recognizes. The actual HDev entity is a Dev in the storage system.
Each host LU has a host LU number.
(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
#
G
J
M
T
U V W
Y
Z
Glossary-4
Hitachi Dynamic Link Manager User Guide for Linux
®