US6105147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Using process pairs as transaction-coordinated resource managers
Assignee: Tandem Computers Inc
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Filing: 1997-04-16
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Granted: 2000-08-15
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Expires: 2017-04-16
Abstract
Abstract The present invention is a process-pair resource manager for use in a transaction processing system. The process-pair resource manager includes a concurrent aspect and a serial aspect. The concurrent aspect provides an object-like interface to a protected resource. An application program participating in a transaction accesses the protected resource by passing messages to the concurrent aspect. The concurrent aspect adds a description of each message as well as the result of processing each message to a transaction record. At the conclusion of a transaction, the concurrent aspect passes the transaction record to the serial aspect. The serial aspect then replays the transaction, using the transaction record. If the replay of the transaction is consistent with the transaction as recorded in the transaction record, the serial aspect sends a message to the concurrent aspect voting to commit the transaction. In turn, the concurrent aspect sends a message to the transaction manager forwarding the commit message.
Inventors
- 👤 Mark E. Molloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:31
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/14; G06F11/1497; G06F11/1402; G06F11/1415; G06F11/1438; G06F11/1479; G06F11/1482
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
116 words
A resource manager for use in a computer system, the resource manager comprising: a concurrent aspect configured to provide access to a transaction protected resource during one or more concurrent transactions, the concurrent aspect configured to construct a transaction record for each respective transaction, each transaction record including each request message received by the concurrent aspect and each response message sent by the concurrent aspect during a particular transaction; and a serial aspect configured to serially replay the transactions in which the concurrent aspect participates, the serial aspect configured to cause a particular transaction to rollback if the replay of that transaction does not match the transaction record constructed by the concurrent aspect for that transaction.
Claim 2
Dependent Claim
116 words
A resource manager for use in a computer system, the resource manager comprising: a concurrent aspect configured to provide access to a transaction protected resource during one or more concurrent transactions, the concurrent aspect configured to construct a transaction record for each respective transaction, each transaction record including each request message received by the concurrent aspect and each response message sent by the concurrent aspect during a particular transaction; and a serial aspect configured to serially replay the transactions in which the concurrent aspect participates, the serial aspect configured to cause a particular transaction to rollback if the replay of that transaction does not match the transaction record constructed by the concurrent aspect for that transaction.
Claim 3
Dependent Claim
26 words
A resource manager as recited in claim 1 wherein the concurrent aspect is configured to interact with transaction managers as part of a two-phase commit protocol.
Claim 4
Dependent Claim
47 words
A resource manager as recited in claim 2 further comprising a transaction record log and wherein the concurrent aspect is configured to respond to a prepare message received from a transaction manager by adding the transaction record corresponding to the prepare message to the transaction record log.
Claim 5
Dependent Claim
54 words
A resource manager as recited in claim 2 wherein the concurrent aspect is configured to respond to a prepare message received from a transaction manager by forwarding the transaction record corresponding to the prepare message to the serial aspect, receipt of the transaction record acting as an implicit prepare message to the serial aspect.
Claim 6
Dependent Claim
30 words
A resource manager as recited in claim 1 further comprising a passivated serial image, the passivated serial image including information usable to reconstruct the serial image in a between-transaction state.
Claim 7
Independent Claim
130 words
A method for providing access to a transaction protected resource, the method comprising the steps, performed by a computer system, of constructing, by a concurrent aspect, one or more transaction records, each transaction record corresponding to a particular transaction, each transaction record including each request message received by the concurrent transaction during the transaction corresponding to that transaction record, each transaction record also including each response message sent by the concurrent aspect during the transaction corresponding to that transaction record; replaying in sequence, by a serial aspect, the transactions that correspond to the transaction records constructed by the concurrent aspect; and causing, by the serial aspect, a transaction to rollback if the replay of that transaction does not match the transaction record constructed by the concurrent aspect for that transaction.
Claim 8
Independent Claim
130 words
A method for providing access to a transaction protected resource, the method comprising the steps, performed by a computer system, of constructing, by a concurrent aspect, one or more transaction records, each transaction record corresponding to a particular transaction, each transaction record including each request message received by the concurrent transaction during the transaction corresponding to that transaction record, each transaction record also including each response message sent by the concurrent aspect during the transaction corresponding to that transaction record; replaying in sequence, by a serial aspect, the transactions that correspond to the transaction records constructed by the concurrent aspect; and causing, by the serial aspect, a transaction to rollback if the replay of that transaction does not match the transaction record constructed by the concurrent aspect for that transaction.
Claim 9
Dependent Claim
22 words
A method as recited in claim 6 further comprising the step, performed by the concurrent aspect, of registering with a transaction manager.
Claim 10
Dependent Claim
48 words
A method as recited in claim 7 further comprising the steps, performed by the concurrent aspect, of: receiving a prepare message from a transaction manager, the prepare message corresponding to a particular transaction; and adding the transaction record corresponding to the particular transaction to a transaction record log.
Claim 11
Dependent Claim
62 words
A method as recited in claim 7 further comprising the steps, performed by the concurrent aspect, of: receiving a prepare message from a transaction manager, the prepare message corresponding to a particular transaction; and forwarding the transaction record corresponding to the particular transaction to the serial aspect, receipt of the transaction record acting as an implicit prepare message to the serial aspect.
Claim 12
Dependent Claim
38 words
A method as recited in claim 7 further comprising the step, performed by the serial aspect, of constructing a passivated serial image, the passivated serial image including information usable to reconstruct the serial image in a between-transaction state.
Claim 13
Dependent Claim
173 words
A computer program product comprising: a computer usable medium having computer readable code embodied therein for providing a resource manager for use in a computer system, the computer program product comprising: a concurrent aspect including computer readable program code devices configured to cause a computer to provide access to a transaction protected resource during one or more concurrent transactions, the concurrent aspect also including computer readable program code devices configured to cause a computer to construct a transaction record for each respective transaction, each transaction record including each request message received by the concurrent aspect and each response message sent by the concurrent aspect during a particular transaction; and a serial aspect including computer readable program code devices configured to cause a computer to serially replay the transactions in which the concurrent aspect participates, the serial aspect also including computer readable program code devices configured to cause a computer to rollback a transaction if the replay of that transaction does not match the transaction record constructed by the concurrent aspect for that transaction.
Claim 14
Dependent Claim
173 words
A computer program product comprising: a computer usable medium having computer readable code embodied therein for providing a resource manager for use in a computer system, the computer program product comprising: a concurrent aspect including computer readable program code devices configured to cause a computer to provide access to a transaction protected resource during one or more concurrent transactions, the concurrent aspect also including computer readable program code devices configured to cause a computer to construct a transaction record for each respective transaction, each transaction record including each request message received by the concurrent aspect and each response message sent by the concurrent aspect during a particular transaction; and a serial aspect including computer readable program code devices configured to cause a computer to serially replay the transactions in which the concurrent aspect participates, the serial aspect also including computer readable program code devices configured to cause a computer to rollback a transaction if the replay of that transaction does not match the transaction record constructed by the concurrent aspect for that transaction.
Claim 15
Dependent Claim
39 words
A computer program product as recited in claim 11 wherein the concurrent aspect includes computer readable program code devices configured to cause a computer to register the concurrent aspect with transaction managers as part of a two-phase commit protocol.
Claim 16
Dependent Claim
56 words
A computer program product as recited in claim 12 wherein the concurrent aspect includes computer readable program code devices configured to cause a computer to: receive a prepare message from a transaction manager, the prepare message corresponding to a particular transaction; and add the transaction record corresponding to the particular transaction to a transaction record log.
Claim 17
Dependent Claim
70 words
A computer program product as recited in claim 12 wherein the concurrent aspect includes computer readable program code devices configured to cause a computer to: receive a prepare message from a transaction manager, the prepare message corresponding to a particular transaction; and forward the transaction record corresponding to the particular transaction to the serial aspect, receipt of the transaction record acting as an implicit prepare message to the serial aspect.
Claim 18
Dependent Claim
46 words
A computer program product as recited in claim 12 wherein the serial aspect includes computer readable program code devices configured to cause a computer to construct a passivated serial image, the passivated serial image including information usable to reconstruct the serial image in a between-transaction state.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-08-15 | 2004-02-14 | 2004-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-15 | 2008-02-14 | 2008-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-15 | 2012-02-14 | 2012-08-15 | $7700.00 | Window Closed / Lapsed |