WO2001006359A1 - Systeme de recouvrement transactionnel - Google Patents
Systeme de recouvrement transactionnel Download PDFInfo
- Publication number
- WO2001006359A1 WO2001006359A1 PCT/FR2000/002032 FR0002032W WO0106359A1 WO 2001006359 A1 WO2001006359 A1 WO 2001006359A1 FR 0002032 W FR0002032 W FR 0002032W WO 0106359 A1 WO0106359 A1 WO 0106359A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transaction
- data
- transactional
- communication
- logging service
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/466—Transaction processing
Definitions
- the invention relates to the field of transactional exchanges.
- Communication systems using asynchronous transfer modes are increasingly used. Reliable communications are necessary in a large number of cases. Reliability can be ensured by adding transactional mechanisms to the communication service.
- An asynchronous communication service includes a manager and one or more communication channels.
- a supplier (customer of the service) transmits the information by addressing a specific channel.
- the channel transfers information to the client by invoking its interface.
- the channel acts as an intermediary between two consumers by decoupling the transmission of information on one side and the other. We must be able to deliver information reliably while maintaining desynchronization between suppliers and consumers.
- a transaction must satisfy four properties grouped under the acronym ACID meaning: Atomicity, Coherence, Insulation and Durability. These four properties are closely related.
- the objective of the competition control and takeover mechanisms implemented by a transactional engine is to enforce them.
- the atomicity guarantees that either all of the updates to a transaction are made, or none of these updates are made. Failure to comply with this property can lead to all the data evolving from the initial coherent state to an incoherent state.
- any series of actions constituting a transaction is marked by a beginning and an end.
- the start of a transaction signals the transaction start event to the transaction engine.
- Two orders are provided to mark the end of a transaction: “commit” allows the transaction to signal to the transactional monitor that from the isolated point of the transaction all its actions have gone well.
- “Abort” allows the transaction to signal to the transaction monitor that one or more of its actions have failed and that the transaction does not wish to be validated (the data modified by the transaction must be returned to their previous state).
- the transactional monitor decides whether or not to validate the transaction, say to make final the changes made by it In In the event that a system failure occurs before the end of a transaction, it is considered to have been abandoned.
- One of the possible mechanisms in order to respect the atomicity property consists in keeping for each transaction in progress the previous image of any updated data. In case of abandonment of a transaction, it is possible to undo the transaction by applying all the previous images of the transaction.
- the consistency property concerns the semantic consistency of a data set. The maintenance of this can be partly ensured by the mechanisms ensuring the control of integrity constraints and by the maintenance of the ownership of the transactions.
- Isolation is essential in a multitasking environment, to ensure that each transaction sees a consistent state of all of the data. Isolation consists in ensuring that if the transaction is executed in parallel with other transactions (accessing a common set of data), there is a serial execution of the same transactions which would produce the same changes to the data set accessed by transactions. In this case, the isolation property is checked for this set of transactions. Durability ensures that updates to a committed transaction are final. The only action which must make it possible to undo the updates of a validated transaction is the execution of a compensation transaction.
- the invention seeks to improve the devices linked to durability: it is necessary to have light and reliable recovery systems the use of a database is one of the means for reliably storing (“crash resistant”) data, under the control of a transactional monitor.
- a communication service In order to allow delivery of the data in all circumstances in an asynchronous mode, a communication service must memorize the data reliably between two communication steps (receiving the data and transmitting the data). This storage must offer good performance for writing data.
- the databases offer this type of interface and the associated functionalities, but are not very efficient for this particular use. They offer many other features that are unnecessary for data recovery.
- the invention relates to a communication channel connecting a set of transaction initiators and consumers, associated with a logging service having an XA / RO type interface in order to allow a transactional system to perform transactional operations on data. stored in said logging service. These channels can be integrated into any transactional exchange system.
- the invention also relates to a method of communication between a set of transaction initiators and consumers, comprising intermediate communication channels.
- Each validated operation is stored in a logging service having an XA / RO type interface in order to allow the recovery of validated transactional operations.
- the invention uses, instead of a database having a transactional interface and associated with a communication channel, a logging system offering such an interface.
- This interface allows a traditional transactional monitor to pass on to journalized objects the good termination of the transaction (“commit”) or bad (“rollback”), respectively confirm the changes or cancel them.
- a logging system stores all the successive values of a variable, keeping the old ones. In case of data loss, we can always find an older value of this data.
- An XA or RO type interface is added, allowing an external transactional monitor to confirm or cancel modifications on logged data, as well as to recover data.
- the journaling service provides reliable storage means, with fast writes.
- the added interface automates the termination of data modifications according to the indications provided by an external transaction monitor.
- the invention allows interoperability with external transactional monitors in the event of a problem.
- connection service provides an XA-type interface for associating transactional identifiers with actions performed in the logging service.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU65754/00A AU6575400A (en) | 1999-07-15 | 2000-07-13 | Transaction recovery system |
EP00953228A EP1112538A1 (fr) | 1999-07-15 | 2000-07-13 | Systeme de recouvrement transactionnel |
JP2001511549A JP2003505759A (ja) | 1999-07-15 | 2000-07-13 | トランザクション回復システム |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9909191 | 1999-07-15 | ||
FR99/09191 | 1999-07-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001006359A1 true WO2001006359A1 (fr) | 2001-01-25 |
Family
ID=9548140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/002032 WO2001006359A1 (fr) | 1999-07-15 | 2000-07-13 | Systeme de recouvrement transactionnel |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1112538A1 (fr) |
JP (1) | JP2003505759A (fr) |
AU (1) | AU6575400A (fr) |
WO (1) | WO2001006359A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2594853A1 (fr) | 2011-11-21 | 2013-05-22 | Ask Industries Societa' per Azioni | Hotte de captation des fumées à faible bruit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0621528A1 (fr) * | 1993-04-22 | 1994-10-26 | Microsoft Corporation | Mécanisme d'annulation et de répétition à niveaux multiples |
US5530848A (en) * | 1992-10-15 | 1996-06-25 | The Dow Chemical Company | System and method for implementing an interface between an external process and transaction processing system |
EP0867805A1 (fr) * | 1997-03-14 | 1998-09-30 | Canon Kabushiki Kaisha | Dispositif et procédé de traitement d'information pour l'enregistrement de l'histoire d'un procédé |
-
2000
- 2000-07-13 JP JP2001511549A patent/JP2003505759A/ja not_active Withdrawn
- 2000-07-13 EP EP00953228A patent/EP1112538A1/fr not_active Withdrawn
- 2000-07-13 WO PCT/FR2000/002032 patent/WO2001006359A1/fr not_active Application Discontinuation
- 2000-07-13 AU AU65754/00A patent/AU6575400A/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5530848A (en) * | 1992-10-15 | 1996-06-25 | The Dow Chemical Company | System and method for implementing an interface between an external process and transaction processing system |
EP0621528A1 (fr) * | 1993-04-22 | 1994-10-26 | Microsoft Corporation | Mécanisme d'annulation et de répétition à niveaux multiples |
EP0867805A1 (fr) * | 1997-03-14 | 1998-09-30 | Canon Kabushiki Kaisha | Dispositif et procédé de traitement d'information pour l'enregistrement de l'histoire d'un procédé |
Non-Patent Citations (1)
Title |
---|
BENNETT R B ET AL: "SYSTEMS MANAGEMENT FOR COORDINATED RESOURCE RECOVERY", IBM SYSTEMS JOURNAL,US,IBM CORP. ARMONK, NEW YORK, vol. 30, no. 1, 1991, pages 90 - 106, XP000227723, ISSN: 0018-8670 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2594853A1 (fr) | 2011-11-21 | 2013-05-22 | Ask Industries Societa' per Azioni | Hotte de captation des fumées à faible bruit |
Also Published As
Publication number | Publication date |
---|---|
JP2003505759A (ja) | 2003-02-12 |
EP1112538A1 (fr) | 2001-07-04 |
AU6575400A (en) | 2001-02-05 |
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