IBM 3000 6.0.2, Service Manual

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failure group
A collection of disks that share common access paths or adapter connection, and could all become
unavailable through a single hardware failure.
FEK
See file encryption key (FEK).
file encryption key (FEK)
A key used to encrypt sectors of an individual file. See also encryption key.
file system
The methods and data structures used to control how data is stored and retrieved.
file system descriptor
A data structure containing key information about a file system. This information includes the disks
assigned to the file system (stripe group), the current state of the file system, and pointers to key files
such as quota files and log files.
file system descriptor quorum
The number of disks needed in order to write the file system descriptor correctly.
file system manager
The provider of services for all the nodes using a single file system. A file system manager processes
changes to the state or description of the file system, controls the regions of disks that are allocated
to each node, and controls token management and quota management.
fileset
A hierarchical grouping of files managed as a unit for balancing workload across a cluster. See also
dependent fileset, independent fileset.
fileset snapshot
A snapshot of an independent fileset plus all dependent filesets.
flexible service processor (FSP)
Firmware that provides diagnosis, initialization, configuration, runtime error detection, and correction.
Connects to the HMC.
FQDN
See fully-qualified domain name (FQDN).
FSP
See flexible service processor (FSP).
fully-qualified domain name (FQDN)
The complete domain name for a specific computer, or host, on the Internet. The FQDN consists of
two parts: the hostname and the domain name.
G
GPFS cluster
A cluster of nodes defined as being available for use by GPFS file systems.
GPFS portability layer
The interface module that each installation must build for its specific hardware platform and Linux
distribution.
GPFS Storage Server (GSS)
A high-performance, GPFS NSD solution made up of one or more building blocks that runs on System
x servers.
GSS
See GPFS Storage Server (GSS).
H
Hardware Management Console (HMC)
Standard interface for configuring and operating partitioned (LPAR) and SMP systems.
Glossary 65