HP NonStop TMF Glossary Abstract This glossary defines technical terms used in the manuals that support the HP NonStop™ Transaction Management Facility (TMF). It is intended for users of that product and its manuals. Product Version TMF G07 Supported Releases This publication supports G06.23 and all subsequent G-series release version updates (RVUs) until otherwise indicated by its replacement publication.
Document History Part Number Product Version Published 422965-001 NonStop TM/MP D46 March 2001 522415-001 TMF G07 August 2002 522415-002 TMF G07 April 2004
HP NonStop TMF Glossary What’s New in This Glossary iii Glossary Information iii New and Changed Information iv About This Glossary v TMF Documentation v Notation Conventions vi TMF Glossary A B C D E F G H I L M N O P R S T U V Z Glossary-1 Glossary-3 Glossary-3 Glossary-6 Glossary-7 Glossary-8 Glossary-8 Glossary-9 Glossary-9 Glossary-10 Glossary-10 Glossary-10 Glossary-11 Glossary-12 Glossary-14 Glossary-15 Glossary-16 Glossary-18 Glossary-18 Glossary-19 Hewlett-Packard Company—522415-002 i
TMF Glossary Contents HP NonStop TMF Glossary —522415-002 ii
What’s New in This Glossary Glossary Information HP NonStop TMF Glossary Abstract This glossary defines technical terms used in the manuals that support the HP NonStop™ Transaction Management Facility (TMF). It is intended for users of that product and its manuals. Product Version TMF G07 Supported Releases This publication supports G06.23 and all subsequent G-series release version updates (RVUs) until otherwise indicated by its replacement publication.
New and Changed Information What’s New in This Glossary New and Changed Information This is the third edition of the TMF Glossary. It has been updated to support the G06.23 release version update (RVU) of the TMF product and to correct and clarify elements in the previous edition. Enhancements to the Glossary The following enhancements have been made to the definitions in this glossary: • • Miscellaneous editorial corrections have been made (mostly adding hyphenation).
About This Glossary This manual defines technical terms used in the manuals that support the HP NonStop Transaction Management Facility (TMF) on HP NonStop servers. It is intended for users of that product and its manuals. The glossary consists of an alphabetic list of terms and their definitions.
Notation Conventions About This Glossary • • • • TMF Operations and Recovery Guide Read this guide for information about how to perform and monitor standard TMF operations, obtain online and audit dumps, and respond to a variety of TMF exception conditions. TMF Reference Manual Refer to this manual for information about how to use the TMFCOM command interface to TMF. This manual includes syntax, cautionary considerations, and command examples for TMFCOM.
TMF Glossary A B C D E F G H I L M N O P R S T U V Z A abort record. A record in a master audit trail identifying an aborted transaction. aborted transaction. A transaction that was backed out (undone) or is in the process of being backed out. access control block (ACB). An operating system data structure that contains control information for a particular open of a file. An ACB is composed of various types of sections, depending on the type of file to which the ACB corresponds.
audit dump TMF Glossary audit dump. A copy of an audit trail file written to a tape or disk volume by an audit dump process: audit dumps occur automatically when an audit trail file becomes full. An audit dump process may be configured for each audit trail; it can be reconfigured while TMF is running. Audit dumps preserve audit trail files for use by the file recovery process.
autoabort threshold TMF Glossary autoabort threshold. The time limit used to identify long-running transactions that should be aborted. When a transaction runs longer than the threshold, TMF aborts it. To change this threshold, use the ALTER BEGINTRANS command. auxiliary audit trail. An audit trail configured in addition to the master audit trail. Auxiliary audit trails receive the audit information generated by a specified set of audited volumes; they do not contain TMF control information.
child TMF Glossary child. For distributed transactions, the transaction manager that receives and performs work on behalf of another transaction. The transaction manager that sends the work is known as the parent. During the course of the transaction, a child may send a transaction to yet another transaction manager, therefore becoming a parent in the new relationship (but remaining a child in the previous relationship). Contrast with parent. child node.
cluster TMF Glossary cluster. (1) A collection of servers, or nodes, that can function either independently or collectively as a processing unit. (2) A term used to describe a system in a FOX ring. More specifically, a FOX cluster is a collection of processors and I/O devices functioning as a logical group. In FOX nomenclature, the term is synonymous with "system" or "node." COBOL85. The compiler and run-time support for the American National Standards Institute (ANSI) programming language COBOL, X.3.
context-free server TMF Glossary context-free server. A server that does not retain any information about the processing of previous requests. A context-free server accepts a single message from a requester, performs the requested tasks, and issues a single reply to respond to the requester. After the reply message is issued, the server retains no information, or context, that can be used in subsequent requests. Pathway servers should be context-free.
disabled audited volume TMF Glossary disabled audited volume. An audited volume that is exempt from TMF processing. The volume continues to be available for operations other than audited requests, and TMF continues to process transactions for other audited volumes. An audited volume that is disabled is not automatically enabled for TMF processing when TMF is restarted. disk media failure. The failure of disk media to retain stored data; examples are unreadable sectors or damaged disk surfaces.
file TMF Glossary F file. The physical storage for a set of related records in an Enscribe database. Also, the physical storage for a NonStop SQL table or index (the creation of a table or index implicitly creates a file with the same name as the table or index). file recovery. The process of reconstructing specified audited files when the current copies on the audited volume are not usable.
gateway process TMF Glossary gateway process. In heterogeneous transaction processing, an individual process that executes a resource manager routine to export a transaction branch from TMF to a foreign transaction management system, import a transaction branch from a foreign transaction management system to TMF, and participate in the closing agreement protocol between the two transaction management systems. generation. A file or group of files in an online dump that are dumped at a certain time.
integrity TMF Glossary integrity. The state of a database in which stored information is consistent. IP. See independent product (IP). L local transaction. A transaction that involves a requester, servers, and files that all reside on the same system. Contrast with distributed transaction. logical file name. The external file name that an application uses to identify a file stored on an SMF virtual disk. long-running transaction.
nonaudited file TMF Glossary nonaudited file. A disk file that is not flagged for protection by TMF. TMF does not control where a nonaudited file resides, so the file can exist on an audited volume or any other volume. NonStop SQL. A relational database management system that provides efficient online access to large distributed databases.
online recovery mode TMF Glossary online recovery mode. The data volume recovery mode in which TMF maintains a sufficient number of audit trail files on disk for volume recovery. Compare with archive recovery mode. online transaction processing. A method of processing transactions in which entered transactions are immediately applied to the database. The information within the database is readily available to all users through online screens and printed reports.
Pathsend facility TMF Glossary Pathsend facility. A set of NonStop Kernel operating system procedure calls and the LINKMON process, which work together to provide general access to Pathway server classes from any process on a NonStop system. Pathway/TS. An HP product that provides tools for developing and interpreting screen programs to support OLTP applications in the NonStop Kernel operating system environment on NonStop systems.
$RECEIVE TMF Glossary R $RECEIVE. The file through which a process receives and replies to messages from other processes. recoverable resource manager. A resource manager that represents data that can be recovered after a failure. This type of resource manager must be registered with TMF in the resource manager directory before it can be opened by a gateway process. recovery. The returning of a database file or files to a consistent state. recovery mode. See online recovery mode and archive recovery mode.
restore-audit volume TMF Glossary restore-audit volume. A disk volume on the local system used to receive audit-trail files restored from an audit dump on tape as part of a recovery procedure. The system manager can configure up to 16 restore-audit volumes. Any disk volume can be configured as a restore-audit volume, including volumes configured for other TMF purposes. rollover. See audit-trail rollover. round-robin.
Subsystem Control Facility (SCF) TMF Glossary Subsystem Control Facility (SCF). An interactive interface for configuring, controlling, and collecting information from objects on S-series NonStop servers. Subsystem Programmatic Interface (SPI). A common, message-based interface that can be used to build and decode messages used for communication between requesters and servers—for instance, in a management application.
TMF incarnation TMF Glossary TMF incarnation. Each new creation of a TMF configuration begins with a DELETE TMF command and is referred to as an incarnation; any previous configuration is erased. TMF uses unique identifiers to distinguish between information and resources associated with particular TMF incarnations. TMF operation. A TMF function, such as TMF Start, TMF Stop, or file recovery.
TMF Glossary transaction management process (TMP) transaction management process (TMP). The TMF management process pair, always named $TMP, coordinates transactions distributed over a network. The TMP is also in charge of operations that require a single point of control in a system, such as starting and stopping TMF, initiating recovery processes, and implementing configuration changes.
volume recovery TMF Glossary volume recovery. The automatic process of recovering database files to their most recent consistent state if they become inconsistent because of a disk volume or system failure. To recover the files, TMF redoes committed transactions to ensure that they are reflected correctly in the database, and then backs out all transactions that were incomplete at the time of the interruption. Z ZTMFCONF subvolume.
ZTMFAT subvolume TMF Glossary HP NonStop TMF Glossary —522415-002 Glossary -20
