User guide

HP NonStop Storage Management Foundation User's Guide—523562-007
Glossary-1
Glossary
ANT. See Audited Name Table (ANT).
Audited Name Table (ANT). The Enscribe file maintained by each virtual disk process
mapping each logical (external) file name on that volume to its physical (internal) file
name.
catalog. A collection of files that maintains context for virtual disk processes, pools, or
$ZSMS.
direct file. A file that is not name-managed; its logical (external) name and physical
(internal) file are identical. Direct files can also be placed on physical disks in a storage
pool. See also direct volume.
direct volume. A volume that is not in any pool. All files on a direct volume are direct files.
Disk Process 2 (DP2). The portion of the operating system software that performs read,
write, and lock operations on disk volumes. The disk process also implements
Enscribe and NonStop SQL/MP file types; creates TMF audit trail records; performs
logical REDO operations for Remote Duplicate Database Facility (RDF); and manages
disk space, disk controllers, and paths to the disks. This disk process provides
enhanced performance, throughput, recoverability, and reliability improvements in high-
volume, online transaction processing environments.
DOWN state. A process state in which a process is capable of supporting only informational
operations.
DP2. See Disk Process 2 (DP2).
external name. The file name known and used by applications. For logically named files,
this is the logical name. For direct files, external name is the direct name.
format 1 file. Any file created on a system running a release version update (RVU)
preceding G06.00 or D46.00, or a file created on any newer RVU that is smaller than 2
GB minus 1 MB.
format 2 file. A large format file or a file that can contain larger partitions than a file created
on release version updates (RVUs) preceding G06.00 or D46.00. A format 2 file can
exceed the 2 GB minus 1 MB size limit of a format 1 file.
internal file name. The name by which a file is known to DP2. For a direct file, this is the
same as the file name. For a file that is name-managed by SMF, the physical file name
is on a subvolume whose name begins with ZYS (for logically named files) or ZYT (for
logical temporary files). See also physical file name
.
isolate. A request to SMF that no logically named files be placed on a particular physical
volume.