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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.
HMC
See Hardware Management Console (HMC).
I
IBM Security Key Lifecycle Manager (ISKLM)
For GPFS encryption, the ISKLM is used as an RKM server to store MEKs.
independent fileset
A fileset that has its own inode space.
indirect block
A block that contains pointers to other blocks.
inode
The internal structure that describes the individual files in the file system. There is one inode for each
file.
Glossary 127
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