Sharing large objects in distributed systems
First Claim
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1. A machine-implemented method for sharing large objects comprising:
- recording in a redo log a first set of one or more records describing at least identifying information of a large object prior to storing a second set of one or more records that include at least a portion of content of the large object; and
determining how to process the second set based on the first set.
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Abstract
A system and method for efficiently sharing Large Objects (LOBs) is disclosed. Historical records (e.g., redo logs) are kept in which a marker is placed prior to the LOB. The marker includes identifying information, such as the row-column intersection. Using the identifying information in the marker, the LOB may be shared with other systems without staging the LOB at a source database system, prior to transporting the LOB from the source database system to the destination database system. Additionally, using the identifying information, the LOB may be accessed and manipulated prior to being consumed at the destination system.
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Citations
24 Claims
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1. A machine-implemented method for sharing large objects comprising:
recording in a redo log a first set of one or more records describing at least identifying information of a large object prior to storing a second set of one or more records that include at least a portion of content of the large object; and
determining how to process the second set based on the first set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A machine-readable medium carrying information comprising:
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a log including at least a log of changes made to information stored in a database;
one or more portions of data associated with a large object stored in the database; and
a marker including at least information identifying the large object, wherein the marker is located within the log prior to the one or more portions of data - View Dependent Claims (13)
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14. A machine-readable medium carrying one or more sequences of instructions, which when executed by one or more processors, causes the one or more processors to perform a method comprising:
recording in a redo log a first set of one or more records describing at least identifying information of a large object prior to storing a second set of one or more records that include at least a portion of content of the large object; and
determining how to process the second set based on the first set. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
Specification