Glossary

latency Time duration for processing a transaction or transmitting a unit of data from end to end. When evaluating system performance, both throughput and latency need to be considered. See also: “throughput”.

LDR Local Distribution Router—a unit of the HP Medical Archive software to manage the storage and transmission of content within the grid.

metadata Data that provides information about other data.

namespace A set whose elements are unique names. There is no guarantee that a name in one namespace is not repeated in a different namespace.

NFS Network File System—a protocol (developed by SUN Microsystems) that enables access to network files as if they were on local disks.

NMS Network Management System—a unit of the HP Medical Archive software for alarm monitoring and system administration. It provides

aweb-based interface for managing and monitoring the HPMA system, as well as viewing and reporting on statistics regarding network, DICOM, storage, and many other related attributes for each of the various services and servers.

object store A configured file system on a disk volume. The configuration includes a specific directory structure and resources initialized at system installation.

PACS Picture Archiving and Communication System—a computerized system of patient records management responsible for short and long term (archival) storage of images. Communication with PACS is via

DICOM.

PDF Portable Document Format—a file format (developed by Adobe Systems and based on the postscript language) for exchanging documents between computer systems that may have differing operating systems. It is designed to preserve the appearance of the document regardless of the system used to render it.

release The edition of the complete HP Medical Archive system. Contrast with “version” and “revision”.

revision The edition of a document. Contrast with “version” and “release”.

Samba A suite of programs that implement the Server Message Block (SMB) protocol. It allows files and printers on the host operating system to be shared with other clients. For example, instead of using telnet to log into a Unix machine to edit a file there, a Windows user might connect a drive in Windows Explorer to a Samba server on the Unix machine and edit the file in a Windows editor.

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HP Medical Archive