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公开(公告)号：US10346315B2
公开(公告)日：2019-07-09
申请号：US15606327
申请日：2017-05-26
Applicant: Oracle International Corporation
Inventor： Siddharth Teotia , Krishna Kunchithapadam , Tirthankar Lahiri , Jesse Kamp , Michael J. Gleeson , Juan R. Loaiza , Garret F. Swart , Neil J. S. MacNaughton , Kam Shergill
IPC: G06F16/22 , G06F16/901 , G06F12/1018 , G06F16/2453
Abstract: A hashing scheme includes a cache-friendly, latchless, non-blocking dynamically resizable hash index with constant-time lookup operations that is also amenable to fast lookups via remote memory access. Specifically, the hashing scheme provides each of the following features: latchless reads, fine grained lightweight locks for writers, non-blocking dynamic resizability, cache-friendly access, constant-time lookup operations, amenable to remote memory access via RDMA protocol through one sided read operations, as well as non-RDMA access.
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公开(公告)号：US10120895B2
公开(公告)日：2018-11-06
申请号：US15877125
申请日：2018-01-22
Applicant: Oracle International Corporation
Inventor： Jesse Kamp , Amit Ganesh , Vineet Marwah , Vivekanandhan Raja , Tirthankar Lahiri , Allison L. Holloway , Sanket Hase , Shasank K. Chavan , Niloy Mukherjee , Teck Hua Lee , Michael J. Gleeson , Krishna Kunchithapadam
Abstract: Techniques are provided for maintaining data persistently in one format, but making that data available to a database server in more than one format. For example, one of the formats in which the data is made available for query processing is based on the on-disk format, while another of the formats in which the data is made available for query processing is independent of the on-disk format. Data that is in the format that is independent of the disk format may be maintained exclusively in volatile memory to reduce the overhead associated with keeping the data in sync with the on-disk format copies of the data.
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公开(公告)号：US09292564B2
公开(公告)日：2016-03-22
申请号：US14337179
申请日：2014-07-21
Applicant: Oracle International Corporation
Inventor： Jesse Kamp , Amit Ganesh , Vineet Marwah , Vivekanandhan Raja , Tirthankar Lahiri , Allison L. Holloway , Sanket Hase , Shasank K. Chavan , Niloy Mukherjee , Teck Hua Lee , Michael J. Gleeson , Krishna Kunchithapadam
IPC: G06F17/30
CPC classification number: G06F17/30377 , G06F3/0619 , G06F3/065 , G06F3/0665 , G06F3/0689 , G06F11/2058 , G06F17/30315 , G06F17/30442 , G06F17/30575 , G06F17/30581 , G06F2201/80 , G06F2201/855
Abstract: Techniques are provided for maintaining data persistently in one format, but making that data available to a database server in more than one format. For example, one of the formats in which the data is made available for query processing is based on the on-disk format, while another of the formats in which the data is made available for query processing is independent of the on-disk format. Data that is in the format that is independent of the disk format may be maintained exclusively in volatile memory to reduce the overhead associated with keeping the data in sync with the on-disk format copies of the data.
Abstract translation: 提供的技术用于以一种格式持续保持数据，但使数据库可以以多种格式提供给数据库服务器。 例如，数据可用于查询处理的格式之一是基于磁盘格式，而数据可用于查询处理的另一种格式与磁盘格式无关。 独立于磁盘格式的格式的数据可以专门保存在易失性存储器中，以减少与保持数据与数据的磁盘格式副本同步的开销。
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公开(公告)号：US11080204B2
公开(公告)日：2021-08-03
申请号：US16435101
申请日：2019-06-07
Applicant: Oracle International Corporation
Inventor： Siddharth Teotia , Krishna Kunchithapadam , Tirthankar Lahiri , Jesse Kamp , Michael J. Gleeson , Juan R. Loaiza , Garret F. Swart , Neil J. S. MacNaughton , Kam Shergill
IPC: G06F12/1018 , G06F16/22 , G06F16/2453 , G06F16/901 , G06F12/0864 , G06F12/0868 , G06F12/126 , G06F12/128
Abstract: A hashing scheme includes a cache-friendly, latchless, non-blocking dynamically resizable hash index with constant-time lookup operations that is also amenable to fast lookups via remote memory access. Specifically, the hashing scheme provides each of the following features: latchless reads, fine grained lightweight locks for writers, non-blocking dynamic resizability, cache-friendly access, constant-time lookup operations, amenable to remote memory access via RDMA protocol through one sided read operations, as well as non-RDMA access.
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公开(公告)号：US09881048B2
公开(公告)日：2018-01-30
申请号：US14881356
申请日：2015-10-13
Applicant: Oracle International Corporation
Inventor： Jesse Kamp , Amit Ganesh , Vineet Marwah , Vivekanandhan Raja , Tirthankar Lahiri , Allison L. Holloway , Sanket Hase , Shasank K. Chavan , Niloy Mukherjee , Teck Hua Lee , Michael J. Gleeson , Krishna Kunchithapadam
CPC classification number: G06F17/30377 , G06F3/0619 , G06F3/065 , G06F3/0665 , G06F3/0689 , G06F11/2058 , G06F17/30315 , G06F17/30442 , G06F17/30575 , G06F17/30581 , G06F2201/80 , G06F2201/855
Abstract: Techniques are provided for maintaining data persistently in one format, but making that data available to a database server in more than one format. For example, one of the formats in which the data is made available for query processing is based on the on-disk format, while another of the formats in which the data is made available for query processing is independent of the on-disk format. Data that is in the format that is independent of the disk format may be maintained exclusively in volatile memory to reduce the overhead associated with keeping the data in sync with the on-disk format copies of the data.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20180341653A1
公开(公告)日：2018-11-29
申请号：US15606322
申请日：2017-05-26
Applicant: Oracle International Corporation
Inventor： Siddharth Teotia , Krishna Kunchithapadam , Jesse Kamp , Tirthankar Lahiri , Michael J. Gleeson , Juan R. Loaiza , Garret F. Swart , Neil J.S. MacNaughton , Kam Shergill
IPC: G06F17/30 , G06F15/173 , G06F12/1045
Abstract: Techniques are provided for enabling a requesting entity to retrieve data that is managed by a database server instance from the volatile memory of a server machine that is executing the database server instance. The techniques allow the requesting entity to retrieve the data from the volatile memory of the host server machine without involving the database server instance in the retrieval operation. Because the retrieval does not involve the database server instance, the retrieval may succeed even when the database server instance has stalled or become unresponsive. In addition, direct retrieval of data using the techniques described herein will often be faster and more efficient than retrieval of the same information through conventional interaction with the database server instance.
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公开(公告)号：US20180341596A1
公开(公告)日：2018-11-29
申请号：US15606327
申请日：2017-05-26
Applicant: Oracle International Corporation
Inventor： Siddharth Teotia , Krishna Kunchithapadam , Tirthankar Lahiri , Jesse Kamp , Michael J. Gleeson , Juan R. Loaiza , Garret F. Swart , Neil J.S. MacNaughton , Kam Shergill
IPC: G06F12/1018 , G06F17/30
CPC classification number: G06F12/1018 , G06F12/0864 , G06F12/0868 , G06F12/126 , G06F12/128 , G06F16/2255 , G06F16/2453 , G06F16/9014 , G06F2212/1041 , G06F2212/313 , G06F2212/621
Abstract: A hashing scheme includes a cache-friendly, latchless, non-blocking dynamically resizable hash index with constant-time lookup operations that is also amenable to fast lookups via remote memory access. Specifically, the hashing scheme provides each of the following features: latchless reads, fine grained lightweight locks for writers, non-blocking dynamic resizability, cache-friendly access, constant-time lookup operations, amenable to remote memory access via RDMA protocol through one sided read operations, as well as non-RDMA access.
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公开(公告)号：US20180144023A1
公开(公告)日：2018-05-24
申请号：US15877125
申请日：2018-01-22
Applicant: Oracle International Corporation
Inventor： Jesse Kamp , Amit Ganesh , Vineet Marwah , Vivekanandhan Raja , Tirthankar Lahiri , Allison L. Holloway , Sanket Hase , Shasank K. Chavan , Niloy Mukherjee , Teck Hua Lee , Michael J. Gleeson , Krishna Kunchithapadam
CPC classification number: G06F17/30377 , G06F3/0619 , G06F3/065 , G06F3/0665 , G06F3/0689 , G06F11/2058 , G06F17/30315 , G06F17/30442 , G06F17/30575 , G06F17/30581 , G06F2201/80 , G06F2201/855
Abstract: Techniques are provided for maintaining data persistently in one format, but making that data available to a database server in more than one format. For example, one of the formats in which the data is made available for query processing is based on the on-disk format, while another of the formats in which the data is made available for query processing is independent of the on-disk format. Data that is in the format that is independent of the disk format may be maintained exclusively in volatile memory to reduce the overhead associated with keeping the data in sync with the on-disk format copies of the data.
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公开(公告)号：US08977597B2
公开(公告)日：2015-03-10
申请号：US14073832
申请日：2013-11-06
Applicant: Oracle International Corporation
Inventor： Amit Ganesh , Juan R. Loaiza , Krishna Kunchithapadam
CPC classification number: G06F11/1474 , G06F17/30
Abstract: Techniques for maintaining a cascading index are provided. In one approach, one or more branch node compression techniques are applied to the main index of a cascading index. In an approach, a Bloom filter is generated and associated with, e.g., a branch node in the main index. The Bloom filter is used to determine whether, without accessing any leaf blocks, a particular key value exists, e.g., in leaf blocks associated with the branch node. In an approach, a new redo record is generated in response to a merge operation between two levels of the cascading index. The new redo record comprises (a) one or more addresses of blocks that are affected by the merge operation, (b) data is that being “pushed down” to a lower level of the cascading index, and (c) one or more addresses of blocks that are written to storage as a result of the merge operation.
Abstract translation: 提供了维护级联索引的技术。 在一种方法中，一个或多个分支节点压缩技术被应用于级联索引的主索引。 在一种方法中，生成Bloom过滤器并与例如主索引中的分支节点相关联。 Bloom过滤器用于确定在不访问任何叶片块的情况下是否存在特定的键值，例如在与分支节点相关联的叶片块中。 在一种方法中，响应于级联索引的两个级别之间的合并操作，生成新的重做记录。 新的重做记录包括（a）受合并操作影响的块的一个或多个地址，（b）数据被“下推”到级联索引的较低级，以及（c）一个或多个地址 作为合并操作的结果写入存储器的块。
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公开(公告)号：US10803039B2
公开(公告)日：2020-10-13
申请号：US15606322
申请日：2017-05-26
Applicant: Oracle International Corporation
Inventor： Siddharth Teotia , Krishna Kunchithapadam , Jesse Kamp , Tirthankar Lahiri , Michael J. Gleeson , Juan R. Loaiza , Garret F. Swart , Neil J. S. MacNaughton , Kam Shergill
IPC: G06F12/1045 , G06F15/173 , G06F16/22 , G06F16/907
Abstract: Techniques are provided for enabling a requesting entity to retrieve data that is managed by a database server instance from the volatile memory of a server machine that is executing the database server instance. The techniques allow the requesting entity to retrieve the data from the volatile memory of the host server machine without involving the database server instance in the retrieval operation. Because the retrieval does not involve the database server instance, the retrieval may succeed even when the database server instance has stalled or become unresponsive. In addition, direct retrieval of data using the techniques described herein will often be faster and more efficient than retrieval of the same information through conventional interaction with the database server instance.
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