HP Medical Archive Solutions Audit Message Reference Guide March 2005 (First Edition) Part Number 393234-001
© Copyright 2005 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Microsoft, Windows, and Windows NT are U.S.
HPMA Audit Message Reference DISCLAIMER While every reasonable effort has been made to achieve technical accuracy and completeness, information in this document is subject to change without notice and does not represent a commitment on the part of Bycast Inc., or any of its subsidiaries, affiliates, licensors, or resellers. There are no warranties, express or implied, with respect to the content of this document. Features and specifications of Bycast® products are subject to change without notice.
Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Currency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii vii vii References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii Document Structure . . . . . . . . . . . . . . . . . . . . . . . . . . .
HPMA Audit Message Reference CBSE—Object Send End . . . . . . . . . . . . . . . . . . . . . . . . . CDAD—DICOM Study Add . . . . . . . . . . . . . . . . . . . . . . DASC—DICOM Association Close . . . . . . . . . . . . . . . . DASE—DICOM Association Establish . . . . . . . . . . . . . DASF—DICOM Association Fail . . . . . . . . . . . . . . . . . . DCFE—DICOM C–FIND End . . . . . . . . . . . . . . . . . . . . DCFS—DICOM C–FIND Start . . . . . . . . . . . . . . . . . . . . DCGE—DICOM C–GET End . . . . . . . .
SVRU—Object Store Verify Unknown . . . . . . . . . . . . . SYSD—Node Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SYSU—Node Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TACB—Grid Task Action Begin . . . . . . . . . . . . . . . . . . . TACE—Grid Task Action End . . . . . . . . . . . . . . . . . . . . TSGC—Grid Task Stage Change . . . . . . . . . . . . . . . . . . TSTC—Grid Task State Change . . . . . . . . . . . . . . . . . . . Glossary . . . . . . . . . . . . . . . .
HPMA Audit Message Reference vi HP Medical Archive
Preface Purpose The Audit Management System (AMS) service stores audit messages of grid activity and events to a set of text log files. To enable you to read and analyze the audit trail, this document provides information on the structure and content of the text file log.
HPMA Audit Message Reference References This document assumes familiarity with many terms related to computer operations and programming, network communications, and operating system file operations. There is wide use of acronyms. To assist you, there is a glossary at the back of this reference (page 65). Document Structure HP Medical Archive product guides are generally provided in printed format. They may also be available in Adobe® Acrobat® PDF (Portable Document Format).
Preface Terminology There is some room for confusion between common computer network terminology for “server” and “node” as they are used in HP Medical Archive products and documents. A server is usually thought of as a piece of computing hardware that provides data services to requesting network clients; a resource providing network, computational, and storage services. Within the context of the HP Medical Archive, a server is an entity hosting one or more grid services.
HPMA Audit Message Reference • Field prompts, names of windows and dialogs, messages, and other literal text in the interface is shown in sans-serif such as the LDR State pull down menu, or the Sign In... window. • Items within the narrative that require emphasis appear in italics. • Coding samples or interactions with a command terminal are shown in the fixed space font: Any italicized portion indicates variable data you provide to meet your needs.
Audit Message Overview 1 Chapter Contents Overview of Auditing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Audit Message Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Message Retention. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Audit Log File Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HPMA Audit Message Reference Overview of Auditing As services in the grid perform various activities and process events, audit messages are generated to retain a record of grid activity. These messages are processed by the Audit Management System (AMS) service and stored in the form of text log files. This document provides information on the structure and content of the text log files to enable you to read and analyze the audit trail of grid activity.
Audit Message Overview Relay services are designated at the time the grid topology is configured. Any grid service (LDR, ADC, CMS, and so on) can be designated to act as an audit message relay. Message Retention Once an audit message is generated, it is stored on the local server of the originating service until it has been committed to all connected AMS servers, or a designated audit relay service. The relays in turn store the message until it is committed at all AMS services.
HPMA Audit Message Reference sumption of the available storage on the server hosting the AMS service. Based on the requirements of your enterprise, either archive the older compressed files to some other media (such as DVD-R, or into the grid itself), or they will be automatically deleted. Audit Log File Access Access to the text log file at the AMS requires you to have an account and password to access the audit share on the server hosting the AMS service.
File and Message Format 2 Chapter Contents Audit Log File Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Audit Message Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Event-Specific Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Common Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HPMA Audit Message Reference Audit Log File Format The audit log contains individual audit messages in the following format: 1. Date and time stamp (local time) the message was processed at the AMS, followed by the server host name and the string “AMS:”. 2. The message itself, enclosed within square brackets “[]”. The message structure is discussed in the next section on page 6. The following is the beginning of a sample log file.
File and Message Format • Do not have delimiters (no commas or spaces) between attributes • Terminated by a carriage return and line feed () Each element includes: an attribute code, data type, and value. It takes the format: [ATTR(type):value][ATTR(type):value]... [ATTR(type):value] Where: • ATTR is a four-character code for the attribute being reported. See Chapter 3, starting on page 11 for a directory of message attributes and their meaning.
HPMA Audit Message Reference Table 1: Data Types (cont.) Type Description IP32 IP Address; a 32-bit IP address representation. CSTR C String; a variable length array of characters. Event-Specific Data Following the opening “[AUDT” container that identifies the message itself, is a series of items specific to each event or action. Chapter 3, “Message Reference” on page 11 lists attributes commonly used for tracing grid activity.
File and Message Format Table 2: Common Elements of Audit Messages (cont.) Code Type Description ANID UI32 Node ID—The grid node ID assigned to the service that generated the message. Each service is allocated a unique identifier at the time the HP Medical Archive is configured and installed. This ID cannot be changed. AMID FC32 Module ID—A four-character identifier of the module ID that generated the message. This indicates the code segment within which the audit message was generated.
HPMA Audit Message Reference 10 HP Medical Archive
Message Reference 3 A comprehensive listing of generated audit messages. Chapter Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 System Audit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Object Audit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 HTTP Protocol Audit Messages . . . . . . . . . . . . . . . . . . . . . . 14 DICOM Audit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . .
HPMA Audit Message Reference Introduction This chapter provides detailed descriptions of the attributes reported in all audit messages issued by the system. Messages are listed alphabetically to facilitate referencing the content for a specific message of interest. To reference related messages for a given class of activity, use the tables in the subsections below.
Message Reference Table 3: System Audit Messages (cont.) Code Description Page TSTC Grid Task State Change—A grid task has been added, started, paused, canceled, or completed. 63 TSGC Grid Task Stage Change—The stage of a grid task has changed. 62 TACB Grid Task Action Begin—A grid task action has begun. 61 TACE Grid Task Action End—A grid task action has completed. 61 BKSB Backup Store Begin—A service has begun a backup operation.
HPMA Audit Message Reference Table 4: Object Audit Messages Code Description Page SREM Object Store Remove—A content block was deleted from a node, and can no longer be requested directly. 58 SVRF Object Store Verify Fail—A content block failed verification checks. 59 SVRU Object Store Verify Unknown—Unexpected file(s) detected in the object store.
Message Reference Table 5: HTTP Protocol Audit Messages Code Description Page HPOS HTTP POST Transaction Start—An HTTP client initiated a query for stored content. 51 HPOE HTTP POST Transaction End—An HTTP client completed a query for stored content. 50 HDEL HTTP DELETE Transaction—Logs the result of a request to delete content. 45 HOPT HTTP OPTIONS Transaction—Logs the result of a request for information about the transactions that can be performed on content.
HPMA Audit Message Reference Table 6: DICOM Audit Messages Code Description Page DCPE DICOM C–STORE End—A transfer of content between hosts over a DICOM association has completed. 32 DCSF DICOM C–STORE Fail—A transfer of content between hosts over a DICOM association has failed. 34 DCFS DICOM C–FIND Start—A remote DICOM host initiated a query for DICOM-related content. 27 DCFE DICOM C–FIND End—A remote DICOM host completed a query for DICOM-related content.
Message Reference Table 7: File System Gateway Audit Messages Code Description Page FMFY File Modify—Logs changes to the content of an existing file. 41 FSTG File Store to Grid—Logs the storage of content from the FSG local cache to the grid. 42 FSWO File Swap Out—Logs the deletion of a file from the FSG local cache (but not from the directory tree or grid). 43 FSWI File Swap In—Logs the retrieval of a file from the grid to the FSG local cache.
HPMA Audit Message Reference Table 8: BKSB—Backup Store Begin Fields (cont.) Code Field Description BKEE Entries to Backup The number of entries (objects) the entity expects to include in this backup session. If the value is unknown, this field is set to zero (0). RSLT Backup Initiation Status This field indicates status at the time the backup store was initiated: SUCS—the backup store started successfully. This message marks the time of a backup session.
Message Reference whether the backup was successful and the UUID of the backup data within the grid, should a restoration be needed. CBRB—Object Receive Begin During normal system operations, content blocks are continuously transferred between different nodes as data is accessed, replicated and retained. When transfer of a content block from one node to another is initiated, this message is issued by the destination entity.
HPMA Audit Message Reference system data flow, and when combined with storage audit messages, to verify replica counts. CBRE—Object Receive End When transfer of a content block from one node to another is completed, this message is issued by the destination entity. Table 11: CBRE—Object Receive End Fields Code Field Description CNID Connection Identifier The unique identifier of the node-to-node content block transfer.
Message Reference This audit message means a node-to-node data transfer operation was completed. If the Transfer Result was successful, the operation transferred data from “Start Sequence Count” to “Actual End Sequence Count”. Sending and receiving nodes are identified by their node IDs. This information can be used to track system data flow and to locate, tabulate, and analyze errors. When combined with storage audit messages, it can also be used to verify replica counts.
HPMA Audit Message Reference This audit message means a node-to-node data transfer operation was initiated on a single piece of content, as identified by its Content Block Identifier. The operation requests data from “Start Sequence Count” to “Expected End Sequence Count”. Sending and receiving nodes are identified by their node IDs. This information can be used to track system data flow, and when combined with storage audit messages, to verify replica counts.
Message Reference Table 13: CBSE—Object Send End Fields (cont.) Code RSLT Field Description Transfer Result The result of the transfer operation (from the perspective of the sending entity): SUCS—transfer successfully completed; all requested sequence counts were sent.
HPMA Audit Message Reference DASC—DICOM Association Close When an established DICOM association with a remote host is closed, this message is issued. Table 15: DASC—DICOM Association Close Fields Code Field Description ASID Association Identifier The unique identifier assigned to the DICOM association.
Message Reference Table 16: DASE—DICOM Association Establish Fields (cont.) Code Field Description DIDR Association Direction Indicates whether the association was opened by the grid node or by a remote host: INBO—initiated by a remote host connecting to the grid node OUTB—initiated by the grid node connecting to a remote host RMAE External Application Entity The Application Entity Title of the remote device. GRAE Grid Application Entity The Application Entity Title of the grid.
HPMA Audit Message Reference Table 17: DASF—DICOM Association Fail Fields (cont.) Code Field Description RMAE External Application Entity The Application Entity Title of the remote device (if unknown, this field contains a null string). GRAE Grid Application Entity The Application Entity Title of the grid.
Message Reference Table 18: DCFE—DICOM C–FIND End Fields (cont.) Code Field Description ROOT DICOM Query Root The query root specified in the C–FIND. LEVL DICOM Query Level The query level specified in the C–FIND. RSFD Results Found The number of DICOM objects found matching the query.
HPMA Audit Message Reference This audit message means a remote DICOM host initiated a query for DICOM-related content. It can be monitored to determine the content being queried. The time interval between the C–FIND Start and C–FIND End audit messages tells you how long the related C–FIND operations are taking to complete. DCGE—DICOM C–GET End When a DICOM association completes a C–GET operation to query and retrieve found content, this message is issued.
Message Reference DCGS—DICOM C–GET Start When a DICOM association initiates a C–GET operation to query and retrieve DICOM content, this message is issued. Table 21: DCGS—DICOM C–GET Start Fields Code Field Description ASID Association Identifier The unique identifier assigned to the DICOM association. DIDR C–GET Direction Indicates whether the C–GET was initiated by the grid node or by a remote host: INBO—initiated by a remote host ROOT DICOM Query Root The query root specified in the C–GET.
HPMA Audit Message Reference Table 22: DCME—DICOM C–MOVE End Fields (cont.) Code Field Description DIDR C–MOVE Direction Indicates whether the C–MOVE was initiated by the grid node or by a remote host: INBO—initiated by a remote host ROOT DICOM Query Root The query root specified in the C–MOVE. LEVL DICOM Query Level The query level specified in the C–MOVE. SAET Source Application Entity (AE) Title The source AE-Title for the C–MOVE operation.
Message Reference DCMS—DICOM C–MOVE Start When a DICOM association initiates a C–MOVE operation to query and transfer DICOM content over a second association, this message is issued. Table 23: DCMS—DICOM C–MOVE Start Fields Code Field Description ASID Association Identifier The unique identifier assigned to the DICOM association.
HPMA Audit Message Reference DCMT—DICOM Storage Commitment When a DICOM association initiates a Storage Commitment operation to determine if content has been successfully received and stored, this message is issued. Table 24: DCMT—DICOM Storage Commitment Fields Code Field Description ASID Association Identifier The unique identifier assigned to the DICOM association. ISTR Items Requested The number of items requested for storage verification.
Message Reference Table 25: DCPE—DICOM C–STORE End Fields (cont.) Code Field Description STUG Study Instance UID The Study Identifier of the data being transferred. SERG Series Instance UID The Series Identifier of the data being transferred. IMGG SOP Instance UID The Image Identifier of the data being transferred. STCL SOP Class The SOP Class of the instance. STTX Transfer Syntax The Transfer Syntax of the instance.
HPMA Audit Message Reference DCPS—DICOM C–STORE Start When a DICOM association initiates a C–STORE operation to transfer content from one host to another, this message is issued. Table 26: DCPS—DICOM C–STORE Start Fields Code Field Description ASID Association Identifier The unique identifier assigned to the DICOM association.
Message Reference Table 27: DCSF—DICOM C–STORE Fail Fields (cont.) Code Field Description DAIP Destination IP Address The destination IP address for the C–STORE operation. If unknown, this field is omitted from the audit message output. RMAE External Application Entity (AE) The AE-Title of the destination device. If unknown, this field is omitted from the audit message output.
HPMA Audit Message Reference ETAF—Security Authentication Failed A connection attempt using Transport Layer Security (TLS) has failed. Table 28: ETAF—Security Authentication Failed Fields Code Field Description CNID Connection Identifier The unique grid identifier for the TCP/IP connection over which the authentication failed. RUID User Identity A service dependent identifier representing the identity of the remote user.
Message Reference ETCA—TCP/IP Connection Establish When a connection to a service running on a node is permitted, this message is generated. Table 29: ETCA—TCP/IP Connection Establish Fields Code Field Description SEID Service Identifier The unique identifier of the service to which the connection was established.
HPMA Audit Message Reference ETCC—TCP/IP Connection Close When the system on either side of an established connection closes the connection (either normally or abnormally), this message is generated. Table 30: ETCC—TCP/IP Connection Close Fields Code Field Description CNID Connection Identifier The unique identifier of the connection.
Message Reference Table 31: ETCF—TCP/IP Connection Fail Fields (cont.) Code Field Description CNDR Connection Direction Indicates the connection attempt was made to a remote host: OUTB—connection initiated by the grid node, which attempted a connection to a remote host SVIP Destination Service Port The port to which the connection attempt was made. DAIP Destination IP Address The IP address to which the connection attempt was made (remote IP address).
HPMA Audit Message Reference FCRE—File Create When a new file is created on the FSG, this logs the creation. Table 32: FCRE—File Create Fields Code FPTH Field Description File Path The complete path and name of the file that has been created. This audit message means a new file entry has been added to the FSG directory tree. The content of the file resides on the local FSG cache, and the process of storing it within the grid has initiated.
Message Reference FMFY—File Modify When an existing file entry in the FSG is modified (overwritten), this logs the change. Table 34: FMFY—File Modify Fields Code Field Description FPTH File path The complete path and name of the file being modified. UUID Universal Unique ID The identifier of the original version of the file within the grid. The original content of the file being changed is retained within the grid at the UUID provided, but can no longer be accessed through the FSG.
HPMA Audit Message Reference FSTG—File Store to Grid When new content is stored via the FSG, the content is cached locally by the FSG server and is copied into the grid. When the grid confirms it has stored the copy (and is processing it under its business rules for replication), this message is issued. Table 36: FSTG—File Store to Grid Fields Code Field Description FPTH File path The complete path and name of the file being stored.
Message Reference Table 37: FSWI—File Swap In Fields (cont.) Code RSLT Field Description Result Code The result of the file retrieve operation: SUCS—Successfully retrieved. TOUT—Failed due to timeout. ERRC—Failed due to lost connection. GERR—A general error occurred while retrieving the content. The original content of the file (along with its associated path and file name metadata) is retained within the grid at the UUID provided.
HPMA Audit Message Reference HCPE—HTTP PUT C–STORE End An object can be stored into the /DICOM namespace over an established HTTP session by initiating a PUT transaction to process and store the content as a DICOM object in the grid. When DICOM object storage has completed, this message is issued. Table 39: HCPE—HTTP PUT C–STORE End Fields Code Field Description HSID Session Identifier The unique identifier assigned to the HTTP session established to the node.
Message Reference HCPS—HTTP PUT C–STORE Start An object can be stored into the /DICOM namespace over an established HTTP session by initiating a PUT transaction to process and store the content as a DICOM object in the grid. When DICOM object storage has been initiated, this message is issued. Table 40: HCPS—HTTP PUT C–STORE Start Fields Code Field Description HSID Session Identifier The unique identifier assigned to the HTTP session established to the node.
HPMA Audit Message Reference Table 41: HDEL—HTTP DELETE Transaction Fields (cont.) Code Field Description UUID Content UUID The Universal Unique IDentifier assigned to the content requested for removal.
Message Reference Table 42: HGEE—HTTP GET Transaction End Fields (cont.
HPMA Audit Message Reference Table 43: HGES—HTTP GET Transaction Start Fields (cont.) Code RSLT Field Description Result Code Status at the time the request for the GET transaction was initiated: SUCS—GET transaction successfully initiated BRQT—GET transaction malformed This audit message means a request for transfer of content to an HTTP client has been initiated. It can be monitored to determine the content sent to particular systems.
Message Reference Table 44: HHEA—HTTP HEAD Transaction Fields (cont.
HPMA Audit Message Reference Table 45: HOPT—HTTP OPTIONS Transaction Fields (cont.
Message Reference This audit message means an HTTP client has initiated and completed a query for stored content in the specified namespace. It can be monitored to determine the content being queried. The “Result Code” field can be used to determine when errors occurred. The time between the “HTTP POST Transaction Start” and “HTTP POST Transaction End” audit messages tells you how long particular query operations are taking to complete.
HPMA Audit Message Reference HPUE—HTTP PUT Transaction End When an HTTP client completes a PUT transaction to transfer content from the HTTP client to the HTTP server (the node), this message is issued. Table 48: HPUE—HTTP PUT Transaction End Fields Code Field Description HSID Session Identifier The unique identifier assigned to the HTTP session established to the node. OBNS Object Namespace The namespace within which the stored object was handled.
Message Reference This audit message can be monitored to determine the content sent to particular systems. The “Result Code” field can be used to determine when errors occurred. HPUS—HTTP PUT Transaction Start When an HTTP client initiates a PUT transaction to transfer content from the HTTP client to the HTTP server (the node), this message is issued.
HPMA Audit Message Reference Table 50: HTSC—HTTP Session Close Fields (cont.
Message Reference RPSB—Replication Session Begin When a service begins a replication operation—replicating private structured data to a secondary service—this message is generated. Table 52: RPSB—Replication Session Begin Fields Code Field Description RPSI Replication Session ID The unique identifier of the replication session being started. RPPI Previous Session ID The identifier of the previous replication session (if one exists); zero otherwise.
HPMA Audit Message Reference Table 53: RPSE—Replication Session End Fields (cont.) Code Field Description RPPI Next Session ID The identifier of the next replication session (if known). If the next session ID is not known, this value is zero (0). RPSE Replication Source Entity The node ID of the service that is generating the replication session. RPDE Replication Destination Entity The node ID of the service that is accepting the replication session.
Message Reference Table 54: SADD—Security Audit Disable Fields (cont.) Code AEUN Field Description User Name The user name that executed the command to disable audit logging. The message implies that logging was previously enabled but has now been disabled. This is typically only used during bulk ingest to improve system performance. Following the bulk activity, auditing is restored (SADE) and the capability to disable auditing is then permanently blocked.
HPMA Audit Message Reference passed related integrity checks. When a content block is committed to storage, this message is issued. Table 56: SCMT—Object Store Commit Fields Code Field Description CBID Content Block Identifier The unique identifier of the content block committed to permanent storage.
Message Reference SVRF—Object Store Verify Fail Each time content is read from or written to disk, several verification and integrity checks are performed to ensure data being sent to the requesting user is identical to the data originally ingested into the system. If any of these checks fail, the system automatically removes the corrupt data to prevent it from being retrieved again. When a content block fails the verification process, this message is issued.
HPMA Audit Message Reference When an unknown or unexpected file is detected in the object store and moved to the “garbage” directory, this message is issued. Table 59: SVRU—Object Store Verify Unknown Fields Code FPTH Field Description File Path The full path to the unexpected file’s original location. The “SVRU - Object Store Verify Unknown” audit message should be monitored closely. It means unexpected files were detected in the object store.
Message Reference The message does not indicate if the host server was started, only the reporting service. This message can be used to: • Detect discontinuity in the audit trail. • Determine if a service is failing during operation (as the distributed nature of the grid can mask these failures). The Server Manager restarts a failed service automatically. TACB—Grid Task Action Begin When a grid task action begins, this message is generated.
HPMA Audit Message Reference Table 63: TACE—Grid Task Action End Fields (cont.) Code Field Description TSFC Task Stage The current stage of the task. ACNT Task Action Node ID The service node ID being requested to perform the task. ACTT Task Action The action that is being ended.
Message Reference TSTC—Grid Task State Change When a grid task is added, started, paused, canceled, or completed, this message is issued to audit the change in task state. Table 65: TSTC—Grid Task State Change Fields Code Field Description TSID Task ID The unique identifier of the task used to manage the task over its life cycle. TTYP Task Type The type of task. TDSC Task Description A text description of the task. TSRC Task Source A text identification of the issuer of the task.
HPMA Audit Message Reference 64 HP Medical Archive
Glossary ADC AE title Administrative Domain Controller—a unit of the HP Medical Archive software that authenticates grid nodes (certificates) and manages interconnections. It maintains grid topology information. Application Entity Title—the identifier of a DICOM node communicating with other DICOM AEs. AMS Audit Management System—a unit of the HP Medical Archive software that monitors and logs all audited system events and transactions.
HPMA Audit Message Reference content block ID DICOM DR FCS flywheeling See “CBID”. Digital Imaging and COmmunications in Medicine—a standard developed by ACR-NEMA (an alliance of the American College of Radiology and the National Electrical Manufacturer’s Association) for communications between medical imaging devices. Disaster Recovery. Fixed Content Storage—A class of stored data where the data, once captured, is rarely changed and must be retained for long periods of time in its original form.
Glossary LDR metadata Local Distribution Router—a unit of the HP Medical Archive software to manage the storage and transmission of content within the grid. 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.
HPMA Audit Message Reference SSM Service Status Monitor—a unit of the HP Medical Archive software that monitors hardware conditions and reports to the NMS. Every server in the grid runs an instance of the SSM. study A DICOM term for a collection of images (instances) related to an individual patient or subject. SVG Scalable Vector Graphic—a format for digital images that can be scaled without loss of resolution.
