US6675321B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data processing apparatus, method and computer program with optimized key-pointing operation for log record storage
Assignee: Google LLC
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Filing: 1999-11-26
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Granted: 2004-01-06
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Expires: 2019-11-26
Abstract
Abstract A data processing apparatus has a direct access non-volatile memory storage device having a plurality of extent files for storing log records therein; an allocating unit for allocating a current extent file to be used for storing log records; a writing unit for writing log records into the current extent file until the current extent file cannot store any further log records; and a key-pointing unit for performing a key-pointing operation on the written log records when the writing unit has reached the point where no further log records can be stored in the current extent file.
Inventors
- 👤 John Anthony Beaven
- 👤 Amanda Elizabeth Chessell
- 👤 Martin Mulholland
- 👤 David John Vines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:00
CPC Classifications
G; G06; G06F; G06F16/00; G06F16/10; G06F16/17; G06F16/1734; Y; Y10; Y10S; Y10S707/00; Y10S707/99951; Y10S707/99952; Y10S707/99953; Y10S707/99956; Y10S707/99957
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
A data processing apparatus comprising: a direct access non-volatile memory storage device having a plurality of extent files for storing log records therein; allocating means for allocating a current extent file to be used for storing log records; writing means for writing log records into the current extent file until the current extent file cannot store any further log records; and key-pointing means for performing a key-pointing operation on the written log records when the writing means has reached the point where no further log records can be stored in the current extent file.
Claim 2
Dependent Claim
94 words
A data processing apparatus comprising: a direct access non-volatile memory storage device having a plurality of extent files for storing log records therein; allocating means for allocating a current extent file to be used for storing log records; writing means for writing log records into the current extent file until the current extent file cannot store any further log records; and key-pointing means for performing a key-pointing operation on the written log records when the writing means has reached the point where no further log records can be stored in the current extent file.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 wherein the apparatus further comprises means for deleting an extent file after the key-pointing operation is completed.
Claim 4
Dependent Claim
26 words
The apparatus of claim 1 wherein the apparatus further comprises means for converting an extent file into a cushion file after the key-pointing operation is completed.
Claim 5
Dependent Claim
28 words
The apparatus of claim 1 wherein the log records represent transactional data necessary to recover the transactional environment that existed in the apparatus prior to an apparatus failure.
Claim 6
Dependent Claim
28 words
The apparatus of claim 1 wherein the key-point operation is carried out by writing a key-point start record in an extent file subsequent to said current extent file.
Claim 7
Dependent Claim
27 words
The apparatus of claim 5 wherein the key-pointing operation is further carried out by writing active data from said current extent file after said key-point start record.
Claim 8
Dependent Claim
23 words
The apparatus of claim 6 wherein the key-pointing operation is further carried out by writing a key-point end record after said active data.
Claim 9
Dependent Claim
118 words
A computer program product stored on a computer-readable storage medium for running on a data processing system, the data processing system having a direct access non-volatile memory storage device having a plurality of extent files for storing log records therein, the program product for carrying out the following steps when run on the data processing system: allocating a current extent file to be used for storing log records; writing log records into the current extent file until the current extent file cannot store any further log records; and performing a key-pointing operation on the written log records when the writing means has reached the point where no further log records can be stored in the current extent file.
Claim 10
Dependent Claim
118 words
A computer program product stored on a computer-readable storage medium for running on a data processing system, the data processing system having a direct access non-volatile memory storage device having a plurality of extent files for storing log records therein, the program product for carrying out the following steps when run on the data processing system: allocating a current extent file to be used for storing log records; writing log records into the current extent file until the current extent file cannot store any further log records; and performing a key-pointing operation on the written log records when the writing means has reached the point where no further log records can be stored in the current extent file.
Claim 11
Dependent Claim
102 words
A data processing method being carried out on a data processing system, the data processing system having a direct access non-volatile memory storage device having a plurality of extent files for storing log records therein, the method having steps of: allocating a current extent file to be used for storing log records; writing log records into the current extent file until the current extent file cannot store any further log records; and performing a key-pointing operation on the written log records when the writing means has reached the point where no further log records can be stored in the current extent file.
Claim 12
Dependent Claim
102 words
A data processing method being carried out on a data processing system, the data processing system having a direct access non-volatile memory storage device having a plurality of extent files for storing log records therein, the method having steps of: allocating a current extent file to be used for storing log records; writing log records into the current extent file until the current extent file cannot store any further log records; and performing a key-pointing operation on the written log records when the writing means has reached the point where no further log records can be stored in the current extent file.
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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) | 2007-01-05 | 2007-07-07 | 2008-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-01-05 | 2011-07-07 | 2012-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-01-05 | 2015-07-07 | 2016-01-06 | $7700.00 | Window Closed / Lapsed |