Technique for data transfer
First Claim
Patent Images
1. A method for transferring data, comprising:
- identifying multiple data objects that have been changed by one or more transactions;
using heuristics to determine whether to use a batch write command or several single write commands; and
transferring the multiple data objects from local storage to a shared cache structure using the determined batch write command or single write commands.
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Abstract
Disclosed is a system, method, and program for transferring data. When a transaction commits, multiple data objects that have been changed by the transaction are identified. The multiple data objects are written from local storage to a cache structure using a batch write command. When changed data objects at a first system that are not cached in the shared external storage are written to disk, a batch cross invalidation command is used to invalidate the data objects at a second system. Additionally, multiple data objects are read from the cache structure into a processor storage using a batch castout command.
140 Citations
33 Claims
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1. A method for transferring data, comprising:
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identifying multiple data objects that have been changed by one or more transactions; using heuristics to determine whether to use a batch write command or several single write commands; and transferring the multiple data objects from local storage to a shared cache structure using the determined batch write command or single write commands. - View Dependent Claims (2, 3)
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4. A method for transferring data, comprising:
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identifying multiple data objects that have been changed by one or more transactions; and transferring the multiple data objects from local storage to a shared cache structure using a batch write command with a “
force at commit”
protocol.
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5. A method for transferring data, comprising:
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identifying multiple data objects that have been changed by one or more transactions; and transferring the multiple data objects from local storage to a shared cache structure using a batch write command, wherein the batch write command takes as input an input data buffer comprising a list of write-operation blocks that describe entries to be written, a list of entry data contents to be written, a start of list index, an end of list index, and a data offset and returns as output a list of write operation response blocks for each write operation block that indicates the outcome of each write operation block, wherein each of the entries is associated with one of the data objects.
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6. A method for transferring data, comprising:
when changed data objects at a first system that are not cached in shared cache are transferred to disk, sending a batch cross invalidation command identifying the changed data objects transferred to disk. - View Dependent Claims (7, 8, 9)
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10. A method for transferring data, comprising:
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transferring multiple data objects from a cache structure to a processor storage using a single batch castout command; and transferring multiple data objects from the processor storage to disk. - View Dependent Claims (11)
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12. A system for transferring data, comprising:
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means for identifying multiple data objects that have been changed by one or more transactions; and means for using heuristics to determine whether to use a batch write command or several single write commands to transfer the multiple data objects from local storage to a shared cache structure using the batch write command. - View Dependent Claims (13, 14, 15)
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16. A system for transferring data, comprising:
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means for identifying multiple data objects that have been changed by one or more transactions; and means for transferring the multiple data objects from local storage to a shared cache structure using a batch write command with a “
no force”
protocol.
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17. A system for transferring data, comprising:
means for, when changed data objects at a first system that are not cached in shared cache are transferred to disk, sending a batch cross invalidation command identifying the changed data objects transferred to disk. - View Dependent Claims (18, 19, 20)
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21. A system for transferring data, comprising:
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means for transferring multiple data objects from a cache structure to a processor storage using a single batch castout command; and means for transferring multiple data objects from the processor storage to disk. - View Dependent Claims (22)
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23. An article of manufacture comprising a computer readable storage medium including code for transferring data, wherein the code is capable of causing operations, the operations comprising:
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identifying multiple data objects that have been changed by one or more transactions; and using heuristics to determine whether to use a batch write command or several single write commands to transfer the multiple data objects from local storage to a shared cache structure using the batch write command. - View Dependent Claims (24, 25)
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26. An article of manufacture including code for transferring data, wherein the code is capable of causing operations, the operations comprising:
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identifying multiple data objects that have been changed by one or more transactions; and transferring the multiple data objects from local storage to a shared cache structure using a batch write command with a “
force at commit”
protocol.
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27. An article of manufacture comprising a computer readable storage medium including code for transferring data, wherein the code is capable of causing operations, the operations comprising:
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identifying multiple data objects that have been changed by one or more transactions; and transferring the multiple data objects from local storage to a shared cache structure using a batch write command, wherein the batch write command takes as input an input data buffer comprising a list of write-operation blocks that describe entries to be written, a list of entry data contents to be written, a start of list index, an end of list index, and a data offset and returns as output a list of write operation response blocks for each write operation block that indicates the outcome of each write operation block, wherein each of the entries is associated with one of the data objects.
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28. An article of manufacture comprising a computer readable storage medium including code for transferring data, wherein the code is capable of causing operations, the operations comprising:
when changed data objects at a first system that are not cached in shared cache are transferred to disk, sending a batch cross invalidation command identifying the changed data objects transferred to disk. - View Dependent Claims (29, 30, 31)
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32. An article of manufacture comprising a computer readable storage medium including code for transferring data, wherein the code is capable of causing operations, the operations comprising:
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transferring multiple data objects from a cache structure to a processor storage using a single batch castout command; and transferring multiple data objects from the processor storage to disk. - View Dependent Claims (33)
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Specification