inode space
A collection of inode number ranges reserved for an independent leset, which enables more efcient
per-leset functions.
Internet Protocol (IP)
The primary communication protocol for relaying datagrams across network boundaries. Its routing
function enables internetworking and essentially establishes the Internet.
I/O server node
An ESS node that is attached to the ESS storage enclosures. It is the NSD server for the GPFS cluster.
IP
See Internet Protocol (IP).
IP over InniBand (IPoIB)
Provides an IP network emulation layer on top of InniBand RDMA networks, which allows existing
applications to run over InniBand networks unmodied.
IPoIB
See IP over InniBand (IPoIB).
ISKLM
See IBM Security Key Lifecycle Manager (ISKLM).
J
JBOD array
The total collection of disks and enclosures over which a recovery group pair is dened.
K
kernel
The part of an operating system that contains programs for such tasks as input/output, management
and control of hardware, and the scheduling of user tasks.
L
LACP
See Link Aggregation Control Protocol (LACP).
Link Aggregation Control Protocol (LACP)
Provides a way to control the bundling of several physical ports together to form a single logical
channel.
logical partition (LPAR)
A subset of a server's hardware resources virtualized as a separate computer, each with its own
operating system. See also node.
LPAR
See logical partition (LPAR).
M
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 ESS node that hosts the ESS GUI and is not connected to storage. It must be part of a GPFS cluster.
From a system management perspective, it is the central coordinator of the cluster. It also serves as a
client node in an ESS building block.
master encryption key (MEK)
A key that is used to encrypt other keys. See also encryption key.
42
IBM Elastic Storage System 3200: Service Guide
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