公开(公告)号：US09424315B2

公开(公告)日：2016-08-23

申请号：US12099076

申请日：2008-04-07

申请人： Joseph I. Chamdani ,  Alan Beck ,  Hareesh Boinepelli ,  Jim Crowley ,  Ravi Krishnamurthy ,  Jeremy Branscome

发明人： Joseph I. Chamdani ,  Alan Beck ,  Hareesh Boinepelli ,  Jim Crowley ,  Ravi Krishnamurthy ,  Jeremy Branscome

IPC分类号： G06F17/30 ,  G06F9/48

CPC分类号： G06F17/30477 ,  G06F9/4881 ,  G06F17/30474 ,  G06F2209/484

摘要： Embodiments of the present invention provide a run-time scheduler that schedules tasks for database queries on one or more execution resources in a dataflow fashion. In some embodiments, the run-time scheduler may comprise a task manager, a memory manager, and hardware resource manager. When a query is received by a host database management system, a query plan is created for that query. The query plan splits a query into various fragments. These fragments are further compiled into a directed acyclic graph of tasks. Unlike conventional scheduling, the dependency arc in the directed acyclic graph is based on page resources. Tasks may comprise machine code that may be executed by hardware to perform portions of the query. These tasks may also be performed in software or relate to I/O.

摘要翻译： 本发明的实施例提供一种运行时间调度器，其以数据流的方式调度对一个或多个执行资源的数据库查询的任务。 在一些实施例中，运行时调度器可以包括任务管理器，存储器管理器和硬件资源管理器。 当主机数据库管理系统接收到查询时，将为该查询创建一个查询计划。 查询计划将查询分割成各种片段。 这些片段进一步编译成任务的有向非循环图。 与常规调度不同，有向非循环图中的依赖弧基于页面资源。 任务可以包括可由硬件执行以执行查询的部分的机器代码。 这些任务也可以用软件执行或与I / O相关。

公开(公告)号：US20090254774A1

公开(公告)日：2009-10-08

申请号：US12099076

申请日：2008-04-07

申请人： Joseph I. Chamdani ,  Alan Beck ,  Hareesh Boinepelli ,  Jim Crowley ,  Ravi Krishnamurthy ,  Jeremy Branscome

发明人： Joseph I. Chamdani ,  Alan Beck ,  Hareesh Boinepelli ,  Jim Crowley ,  Ravi Krishnamurthy ,  Jeremy Branscome

IPC分类号： G06F11/07 ,  G06F9/455 ,  G06F12/10 ,  G06F12/00 ,  G06F17/30

CPC分类号： G06F17/30477 ,  G06F9/4881 ,  G06F17/30474 ,  G06F2209/484

摘要： Embodiments of the present invention provide a run-time scheduler that schedules tasks for database queries on one or more execution resources in a dataflow fashion. In some embodiments, the run-time scheduler may comprise a task manager, a memory manager, and hardware resource manager. When a query is received by a host database management system, a query plan is created for that query. The query plan splits a query into various fragments. These fragments are further compiled into a directed acyclic graph of tasks. Unlike conventional scheduling, the dependency arc in the directed acyclic graph is based on page resources. Tasks may comprise machine code that may be executed by hardware to perform portions of the query. These tasks may also be performed in software or relate to I/O.

摘要翻译： 本发明的实施例提供一种运行时间调度器，其以数据流的方式调度对一个或多个执行资源的数据库查询的任务。 在一些实施例中，运行时调度器可以包括任务管理器，存储器管理器和硬件资源管理器。 当主机数据库管理系统接收到查询时，将为该查询创建一个查询计划。 查询计划将查询分割成各种片段。 这些片段进一步编译成任务的有向非循环图。 与常规调度不同，有向非循环图中的依赖弧基于页面资源。 任务可以包括可由硬件执行以执行查询的部分的机器代码。 这些任务也可以用软件执行或与I / O相关。

公开(公告)号：US08458129B2

公开(公告)日：2013-06-04

申请号：US12144486

申请日：2008-06-23

申请人： Kapil Surlaker ,  Ravi Krishnamurthy ,  Krishnan Meiyyappan ,  Alan Beck ,  Hung Tran ,  Jeremy Branscome ,  Joseph I. Chamdani

发明人： Kapil Surlaker ,  Ravi Krishnamurthy ,  Krishnan Meiyyappan ,  Alan Beck ,  Hung Tran ,  Jeremy Branscome ,  Joseph I. Chamdani

IPC分类号： G06F7/00

CPC分类号： G06F17/30356 ,  G06F17/30551

摘要： Embodiments of the present invention provide fine grain concurrency control for transactions in the presence of database updates. During operations, each transaction is assigned a snapshot version number or SVN. A SVN refers to a historical snapshot of the database that can be created periodically or on demand. Transactions are thus tied to a particular SVN, such as, when the transaction was created. Queries belonging to the transactions can access data that is consistent as of a point in time, for example, corresponding to the latest SVN when the transaction was created. At various times, data from the database stored in a memory can be updated using the snapshot data corresponding to a SVN. When a transaction is committed, a snapshot of the database with a new SVN is created based on the data modified by the transaction and the snapshot is synchronized to the memory. When a transaction query requires data from a version of the database corresponding to a SVN, the data in the memory may be synchronized with the snapshot data corresponding to that SVN.

摘要翻译： 在存在数据库更新的情况下，本发明的实施例为事务提供细粒度并行性控制。 在操作期间，为每个事务分配一个快照版本号或SVN。 SVN是指可以定期或按需创建的数据库的历史快照。 因此，事务与特定的SVN相关联，例如，当事务被创建时。 属于事务的查询可以访问一个时间点一致的数据，例如对应于创建事务时的最新SVN。 在不同时间，可以使用对应于SVN的快照数据来更新存储在存储器中的数据库的数据。 提交事务时，将根据事务修改的数据创建具有新SVN的数据库快照，并将快照与内存同步。 当事务查询需要来自与SVN对应的数据库的版本的数据时，存储器中的数据可以与对应于该SVN的快照数据同步。

公开(公告)号：US20090319486A1

公开(公告)日：2009-12-24

申请号：US12144486

申请日：2008-06-23

申请人： Kapil Surlaker ,  Ravi Krishnamurthy ,  Krishnan Meiyyappan ,  Alan Beck ,  Hung Tran ,  Jeremy Branscome ,  Joseph I. Chamdani

发明人： Kapil Surlaker ,  Ravi Krishnamurthy ,  Krishnan Meiyyappan ,  Alan Beck ,  Hung Tran ,  Jeremy Branscome ,  Joseph I. Chamdani

IPC分类号： G06F7/06 ,  G06F17/30

CPC分类号： G06F17/30356 ,  G06F17/30551

摘要： Embodiments of the present invention provide fine grain concurrency control for transactions in the presence of database updates. During operations, each transaction is assigned a snapshot version number or SVN. A SVN refers to a historical snapshot of the database that can be created periodically or on demand. Transactions are thus tied to a particular SVN, such as, when the transaction was created. Queries belonging to the transactions can access data that is consistent as of a point in time, for example, corresponding to the latest SVN when the transaction was created. At various times, data from the database stored in a memory can be updated using the snapshot data corresponding to a SVN. When a transaction is committed, a snapshot of the database with a new SVN is created based on the data modified by the transaction and the snapshot is synchronized to the memory. When a transaction query requires data from a version of the database corresponding to a SVN, the data in the memory may be synchronized with the snapshot data corresponding to that SVN.

摘要翻译： 在存在数据库更新的情况下，本发明的实施例为事务提供细粒度并行性控制。 在操作期间，为每个事务分配一个快照版本号或SVN。 SVN是指可以定期或按需创建的数据库的历史快照。 因此，事务与特定的SVN相关联，例如，当事务被创建时。 属于事务的查询可以访问一个时间点一致的数据，例如对应于创建事务时的最新SVN。 在不同时间，可以使用对应于SVN的快照数据来更新存储在存储器中的数据库的数据。 提交事务时，将根据事务修改的数据创建具有新SVN的数据库快照，并将快照与内存同步。 当事务查询需要来自与SVN对应的数据库的版本的数据时，存储器中的数据可以与对应于该SVN的快照数据同步。

公开(公告)号：US20110099155A1

公开(公告)日：2011-04-28

申请号：US12984284

申请日：2011-01-04

申请人： James Shau ,  Krishnan Meiyyappan ,  Hung Tran ,  Ravi Krishnamurthy ,  Kapil Surlaker ,  Jeremy Branscome ,  Joseph I. Chamdani

发明人： James Shau ,  Krishnan Meiyyappan ,  Hung Tran ,  Ravi Krishnamurthy ,  Kapil Surlaker ,  Jeremy Branscome ,  Joseph I. Chamdani

IPC分类号： G06F17/30

CPC分类号： G06F17/30595

摘要： Embodiments of the present invention provide for batch and incremental loading of data into a database. In the present invention, the loader infrastructure utilizes machine code database instructions and hardware acceleration to parallelize the load operations with the I/O operations. A large, hardware accelerator memory is used as staging cache for the load process. The load process also comprises an index profiling phase that enables balanced partitioning of the created indexes to allow for pipelined load. The online incremental loading process may also be performed while serving queries.

摘要翻译： 本发明的实施例提供数据批量和增量加载到数据库中。 在本发明中，装载机基础设施利用机器码数据库指令和硬件加速来将加载操作与I / O操作并行化。 大型的硬件加速器内存用作加载进程的分段缓存。 加载过程还包括一个索引分析阶段，可以对所创建的索引进行平衡分区，以允许流水线负载。 在提供查询时也可以执行在线增量加载过程。

公开(公告)号：US20090254516A1

公开(公告)日：2009-10-08

申请号：US12099133

申请日：2008-04-07

申请人： Krishnan Meiyyappan ,  Liuxi Yang ,  Jeremy Branscome ,  Michael Corwin ,  Ravi Krishnamurthy ,  Kapil Surlaker ,  James Shau ,  Joseph I. Chamdani

发明人： Krishnan Meiyyappan ,  Liuxi Yang ,  Jeremy Branscome ,  Michael Corwin ,  Ravi Krishnamurthy ,  Kapil Surlaker ,  James Shau ,  Joseph I. Chamdani

IPC分类号： G06F7/06 ,  G06F17/30

CPC分类号： G06F17/30442 ,  G06F17/30094 ,  G06F17/30315 ,  G06F17/30492 ,  G06F17/30504

摘要： Embodiments of the present invention provide hardware-friendly indexing of databases. In particular, forward and reverse indexing are utilized to allow for easy traversal of primary key to foreign key relationships. A novel structure known as a hit list also allows for easy scanning of various indexes in hardware. Group indexing is provided for flexible support of complex group key definition, such as for date range indexing and text indexing. A Replicated Reordered Column (RRC) may also be added to the group index to convert random I/O pattern into sequential I/O of only needed column elements.

摘要翻译： 本发明的实施例提供数据库的硬件友好索引。 特别地，正向和反向索引被用于允许轻松地遍历主键到外键关系。 被称为命中列表的新颖结构还允许在硬件中容易地扫描各种索引。 提供组索引，用于复杂组密钥定义的灵活支持，如日期范围索引和文本索引。 还可以将复制的重新排列（RRC）添加到组索引中以将随机I / O模式转换为仅需要的列元素的顺序I / O。

公开(公告)号：US20100005077A1

公开(公告)日：2010-01-07

申请号：US12168821

申请日：2008-07-07

申请人： Ravi Krishnamurthy ,  Chi-Young Ku ,  James Shau ,  Chun Zhang ,  Kapil Surlaker ,  Jeremy Branscome ,  Michael Corwin ,  Joseph I. Chamdani

发明人： Ravi Krishnamurthy ,  Chi-Young Ku ,  James Shau ,  Chun Zhang ,  Kapil Surlaker ,  Jeremy Branscome ,  Michael Corwin ,  Joseph I. Chamdani

IPC分类号： G06F17/30

CPC分类号： G06F16/24542

摘要： Embodiments of the present invention generate and optimize query plans that are at least partially executable in hardware. Upon receiving a query, the query is rewritten and optimized with a bias for hardware execution of fragments of the query. A template-based algorithm may be employed for transforming a query into fragments and then into query tasks. The various query tasks can then be routed to either a hardware accelerator, a software module, or sent back to a database management system for execution. For those tasks routed to the hardware accelerator, the query tasks are compiled into machine code database instructions. In order to optimize query execution, query tasks may be broken into subtasks, rearranged based on available resources of the hardware, pipelined, or branched conditionally

摘要翻译： 本发明的实施例生成和优化在硬件中至少部分可执行的查询计划。 在接收到查询后，查询将被重写和优化，以便查询的片段的硬件执行偏差。 可以采用基于模板的算法将查询转换成片段，然后转换为查询任务。 然后可以将各种查询任务路由到硬件加速器，软件模块，或者发送回数据库管理系统以执行。 对于路由到硬件加速器的任务，将查询任务编译为机器码数据库指令。 为了优化查询执行，查询任务可能被分解为子任务，根据硬件的可用资源，流水线或有条件的分支进行重新排列

公开(公告)号：US20090319550A1

公开(公告)日：2009-12-24

申请号：US12144303

申请日：2008-06-23

申请人： James Shau ,  Krishnan Meiyyappan ,  Hung Tran ,  Ravi Krishnamurthy ,  Kapil Surlaker ,  Jeremy Branscome ,  Joseph I. Chamdani

发明人： James Shau ,  Krishnan Meiyyappan ,  Hung Tran ,  Ravi Krishnamurthy ,  Kapil Surlaker ,  Jeremy Branscome ,  Joseph I. Chamdani

IPC分类号： G06F17/30

CPC分类号： G06F17/30595

摘要： Embodiments of the present invention provide for batch and incremental loading of data into a database. In the present invention, the loader infrastructure utilizes machine code database instructions and hardware acceleration to parallelize the load operations with the I/O operations. A large, hardware accelerator memory is used as staging cache for the load process. The load process also comprises an index profiling phase that enables balanced partitioning of the created indexes to allow for pipelined load. The online incremental loading process may also be performed while serving queries.

摘要翻译： 本发明的实施例提供数据批量和增量加载到数据库中。 在本发明中，装载机基础设施利用机器码数据库指令和硬件加速来将加载操作与I / O操作并行化。 大型的硬件加速器内存用作加载进程的分段缓存。 加载过程还包括一个索引分析阶段，可以对所创建的索引进行平衡分区，以允许流水线负载。 在提供查询时也可以执行在线增量加载过程。

公开(公告)号：US08862625B2

公开(公告)日：2014-10-14

申请号：US12099133

申请日：2008-04-07

申请人： Krishnan Meiyyappan ,  Liuxi Yang ,  Jeremy Branscome ,  Michael Corwin ,  Ravi Krishnamurthy ,  Kapil Surlaker ,  James Shau ,  Joseph I. Chamdani

发明人： Krishnan Meiyyappan ,  Liuxi Yang ,  Jeremy Branscome ,  Michael Corwin ,  Ravi Krishnamurthy ,  Kapil Surlaker ,  James Shau ,  Joseph I. Chamdani

IPC分类号： G06F7/06 ,  G06F17/30

CPC分类号： G06F17/30442 ,  G06F17/30094 ,  G06F17/30315 ,  G06F17/30492 ,  G06F17/30504

摘要： Embodiments of the present invention provide hardware-friendly indexing of databases. In particular, forward and reverse indexing are utilized to allow for easy traversal of primary key to foreign key relationships. A novel structure known as a hit list also allows for easy scanning of various indexes in hardware. Group indexing is provided for flexible support of complex group key definition, such as for date range indexing and text indexing. A Replicated Reordered Column (RRC) may also be added to the group index to convert random I/O pattern into sequential I/O of only needed column elements.

摘要翻译： 本发明的实施例提供数据库的硬件友好索引。 特别地，正向和反向索引被用于允许轻松地遍历主键到外键关系。 被称为命中列表的新颖结构还允许在硬件中容易地扫描各种索引。 提供组索引，用于复杂组密钥定义的灵活支持，如日期范围索引和文本索引。 还可以将复制的重新排列（RRC）添加到组索引中以将随机I / O模式转换为仅需要的列元素的顺序I / O。

公开(公告)号：US08244718B2

公开(公告)日：2012-08-14

申请号：US11895952

申请日：2007-08-27

申请人： Joseph I. Chamdani ,  Raj Cherabuddi ,  Michael Corwin ,  Jeremy Branscome ,  Liuxi Yang ,  Ravi Krishnamurthy

发明人： Joseph I. Chamdani ,  Raj Cherabuddi ,  Michael Corwin ,  Jeremy Branscome ,  Liuxi Yang ,  Ravi Krishnamurthy

IPC分类号： G06F7/00

CPC分类号： G06F17/30442

摘要： Embodiments of the present invention provide a database system that is optimized by using hardware acceleration. The system may be implemented in several variations to accommodate a wide range of queries and database sizes. In some embodiments, the system may comprise a host system that is coupled to one or more hardware accelerator components. The host system may execute software or provide an interface for receiving queries. The host system analyzes and parses these queries into tasks. The host system may then select some of the tasks and translate them into machine code instructions, which are executed by one or more hardware accelerator components. The tasks executed by hardware accelerators are generally those tasks that may be repetitive or processing intensive. Such tasks may include, for example, indexing, searching, sorting, table scanning, record filtering, and the like.

摘要翻译： 本发明的实施例提供了通过使用硬件加速来优化的数据库系统。 该系统可以以若干变型实现，以适应广泛的查询和数据库大小。 在一些实施例中，系统可以包括耦合到一个或多个硬件加速器组件的主机系统。 主机系统可以执行软件或提供用于接收查询的接口。 主机系统将这些查询分析并解析成任务。 然后，主机系统可以选择一些任务并将它们转换成由一个或多个硬件加速器组件执行的机器码指令。 硬件加速器执行的任务通常是可能是重复性或处理密集型的任务。 这样的任务可以包括例如索引，搜索，排序，表扫描，记录过滤等。