IBM Storage Scale System 6000 Service Manual page 77

LPAR
See logical partition (LPAR).
M
management hostname
This is the short name that gets associated with the IP address that is tied to the management (mgmt)
interface on a given node. The definition is contained within the /etc/hosts file (or DNS), and it is
typically a subset of the high-speed interface name.
management network
A network that is primarily responsible for booting and installing the designated server and compute
nodes from the management server.
management server (MS)
An IBM Storage Scale System node that hosts the IBM Storage Scale System GUI and is not
connected to storage. It must be part of an IBM Storage Scale cluster. From a system management
perspective, it is the central coordinator of the cluster. It also serves as a client node in an IBM
Storage Scale System building block.
master encryption key (MEK)
A key that is used to encrypt other keys. See also encryption key.
maximum transmission unit (MTU)
The largest packet or frame, specified in octets (eight-bit bytes), that can be sent in a packet- or
frame-based network, such as the Internet. The TCP uses the MTU to determine the maximum size of
each packet in any transmission.
MEK
See master encryption key (MEK).
metadata
A data structure that contains access information about file data. Such structures include inodes,
indirect blocks, and directories. These data structures are not accessible to user applications.
MS
See management server (MS).
MS virtual machine (MSVM)
Virtual machine of an IBM Storage Scale System management server. See management server and
IBM Storage Scale System.
MTU
See maximum transmission unit (MTU).
N
Network File System (NFS)
A protocol (developed by Sun Microsystems, Incorporated) that allows any host in a network to gain
access to another host or netgroup and their file directories.
Network Shared Disk (NSD)
A component for cluster-wide disk naming and access.
NSD volume ID
A unique 16-digit hexadecimal number that is used to identify and access all NSDs.
node
An individual operating-system image within a cluster. Depending on the way in which the computer
system is partitioned, it can contain one or more nodes. In a Power Systems environment,
synonymous with logical partition.
node descriptor
A definition that indicates how ESS uses a node. Possible functions include: manager node, client
node, quorum node, and non-quorum node.
Glossary 65