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Systems Management: Data Storage Management (XDSM) API
Systems Management: Data Storage Management (XDSM) API
Copyright © 1997 The Open Group
Glossary
DM application
A Data Management application is any application that uses the DMAPI.
DMAPI
Data Management Application Programming Interface. The term
which refers to the interface defined by this XDSM Specification.
DMAPI implementation
The services in the host Operating System which act
as the XDSM API provider
DMIG
Data Management Interfaces Group. This term refers to the
group that developed this Data Storage Management interface
interface between the UNIX kernel and data management applications.
event
A notification from the operating system kernel to a DM application
about an operation on a file. For example, a DM application
can arrange to be notified about attempts to read a particular file.
hole
An area of a file that consists entirely of bytes of zeros.
Some file system implementations may not need to consume any
media resources to maintain such an area.
managed file
A file that is being monitored by a DM application for events.
managed region
A contiguous span of a file given as an (offset, length) pair,
together with an associated event generation specification.
multiple DM applications
In this document, the term multiple DM apps refers to multiple,
non-cooperating and distinct applications that use the DMAPI.
Note that a single product which happens to be constructed using
multiple processes is not an example of "multiple DM applications",
whereas something like a compression product from vendor A and
a backup product from vendor B is.
operating system
In the context of the DMAPI, this is the code that includes the
base kernel as well as any file system or extensions that may have
been added to the kernel.
process
A single UNIX process. For purposes of this document, a process
and a user thread are equivalent.
product
A specific DM application from a single vendor. A single product may
consist of one or more processes working together.
token
A reference to state associated with a synchronous event message.
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