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1. 发明授权

US10444990B2 Fast restart of applications using shared memory 有权
公开(公告)号：US10444990B2
公开(公告)日：2019-10-15
申请号：US14242642
申请日：2014-04-01
申请人： Yong Sik Kwon , Jaeyun Noh , Juchang Lee , Ji Hoon Jang , Sang Kyun Cha
发明人： Yong Sik Kwon , Jaeyun Noh , Juchang Lee , Ji Hoon Jang , Sang Kyun Cha
IPC分类号： G06F3/06 , G06F9/46 , G06F9/54 , G06F9/48 , G06F9/52 , G06F9/44 , G06F13/16 , G06F9/445 , G06F9/4401
摘要： Technologies are described for restarting an application while maintaining data in memory (e.g., using shared memory). For example, shared memory can be associated with an application. The shared memory can also be associated with a holder process to maintain the shared memory from the time the application stops to the time the application starts again. When the application starts, the shared memory can be associated with the started application. In addition, restart of in-memory databases can be provided using shared memory. For example, in-memory data can be maintained when a database process or database management system stops and starts (e.g., during a restart).

2. 发明授权

US09824134B2 Database system with transaction control block index 有权
公开(公告)号：US09824134B2
公开(公告)日：2017-11-21
申请号：US14553494
申请日：2014-11-25
申请人： Ivan Schreter , Juchang Lee , Mihnea Andrei , Changgyoo Park
发明人： Ivan Schreter , Juchang Lee , Mihnea Andrei , Changgyoo Park
IPC分类号： G06F17/30 , G06F15/16
CPC分类号： G06F17/30592 , G06F17/30353
摘要： A plurality of transactions is handled in a database. Each transaction includes a plurality of operations on at least one record in the database with at least two of the transactions being handled concurrently. Thereafter, a temporary timestamp is assigned to each record. The temporary timestamp are based, at least in part, on the corresponding transaction. Further, a final timestamp is assigned to each record with a commit operation. It can later be determined, using a visibility function and based on the assigned temporary timestamps and final timestamps, which of the records are visible in a consistent view for a first transaction. Based on such determination, access can be provided to those records determined to be visible to be accessed to the first transaction.

3. 发明申请

US20160147858A1 Log Forwarding to Avoid Deadlocks During Parallel Log Replay in Asynchronous Table Replication 有权
标题翻译：日志转发以避免在异步表复制期间的并行日志重放期间的死锁
公开(公告)号：US20160147858A1
公开(公告)日：2016-05-26
申请号：US14657854
申请日：2015-03-13
申请人： Juchang Lee , Chang-Gyoo Park , Hyoung-Jun Na , Deok-Hoe Kim
发明人： Juchang Lee , Chang-Gyoo Park , Hyoung-Jun Na , Deok-Hoe Kim
IPC分类号： G06F17/30
CPC分类号： G06F11/1469 , G06F11/1464 , G06F17/30368 , G06F17/30371 , G06F17/30377 , G06F17/30575 , G06F17/30578 , G06F17/30876 , G06F2201/80
摘要： Disclosed herein are system, method, and computer program product embodiments for removing a deadlock during replication from distributed source tables to a replica node. An embodiment operates by detecting a deadlock at a parallel log replayer at a replica node. A first replication log entry from a queue at the parallel log replayer is then selected based on whether removing the first replication log entry from the queue removes the deadlock. The first replication log entry is then forwarded to a waiting queue. A second replication log entry is then replayed at the parallel log replayer. After replaying the second replication log entry, the first replication log entry is replayed at the parallel log replayer.
摘要翻译：这里公开了用于在从分布式源表复制到复制节点的过程中去除死锁的系统，方法和计算机程序产品实施例。实施例通过检测复制节点处的并行日志重播器处的死锁而进行操作。然后根据是否从队列中删除第一个复制日志条目来删除死锁，来选择并行日志重播器中队列中的第一个复制日志条目。然后将第一个复制日志条目转发到等待队列。然后在并行日志重播器中重播第二个复制日志条目。重播第二个复制日志条目后，第一个复制日志条目将在并行日志重播器中重播。

4. 发明申请

US20160147618A1 RowID-Based Data Synchronization for Asynchronous Table Replication 有权
标题翻译：用于异步表复制的基于RowID的数据同步
公开(公告)号：US20160147618A1
公开(公告)日：2016-05-26
申请号：US14657938
申请日：2015-03-13
申请人： Juchang LEE , Kyu-Hwan Kim , Hyoung-Jun Ne , Chang-Gyoo Park , Hyejeong Lee
发明人： Juchang LEE , Kyu-Hwan Kim , Hyoung-Jun Ne , Chang-Gyoo Park , Hyejeong Lee
IPC分类号： G06F11/14 , G06F17/30
CPC分类号： G06F11/1469 , G06F11/1464 , G06F17/30368 , G06F17/30371 , G06F17/30377 , G06F17/30575 , G06F17/30578 , G06F17/30876 , G06F2201/80
摘要： Disclosed herein are system, method, and computer program product embodiments for synchronizing lost change between a source table and a replica table. An embodiment operates by detecting a restart at a source node or a replica node. Row-ID values of replication log entries are then compared to row-ID column values of rows at a replica table of the replica node. Replication errors at a source table or the replica table are then determined based on the row-ID comparison. The rows of the source table and the replica table are then updated based on the determination.
摘要翻译：这里公开了用于使源表和副本表之间的丢失变化同步的系统，方法和计算机程序产品实施例。实施例通过检测在源节点或副本节点处的重启来操作。然后将复制日志条目的行ID值与副本节点的副本表上的行的行ID列值进行比较。然后根据行ID比较确定源表或副本表上的复制错误。然后基于确定来更新源表和副本表的行。

5. 发明授权

US09336262B2 Accelerated transactions with precommit-time early lock release 有权
标题翻译：加速交易与预报时间早期锁定释放
公开(公告)号：US09336262B2
公开(公告)日：2016-05-10
申请号：US12898617
申请日：2010-10-05
申请人： Juchang Lee , Frank Renkes , Sangyong Hwang
发明人： Juchang Lee , Frank Renkes , Sangyong Hwang
IPC分类号： G06F17/00 , G06F17/30
CPC分类号： G06F17/30377 , G06F17/30351 , G06F17/30362 , G06F17/30445
摘要： A system, method and computer product for accelerating parallel database transactions. One or more data processors execute a first transaction on a database. The first transaction includes a transactional lock associated with each of one or more records to update the one or more records during the first transaction, and a pre-commit command to request acknowledgement of committing the updating of the one or more records during the first transaction. The one or more data processors execute a second transaction on the database in parallel with the first transaction. The second transaction includes a transactional lock associated with each of one or more records to update the one or more records during the second transaction, and a pre-commit command to request acknowledgement of committing the updating of the one or more records during the second transaction. The transactional locks of the first and second transactions are released before flushing log records associated with the first and second transactions.
摘要翻译：一种用于加速并行数据库事务的系统，方法和计算机产品。一个或多个数据处理器在数据库上执行第一个事务。第一事务包括与一个或多个记录中的每一个相关联的事务锁，以在第一事务期间更新一个或多个记录;以及预提交命令，用于在第一个事务期间请求确认提交一个或多个记录的更新。一个或多个数据处理器与第一事务并行地执行数据库上的第二事务。第二事务包括与一个或多个记录中的每一个相关联的事务锁，以在第二事务期间更新一个或多个记录;以及预提交命令，用于在第二次事务期间请求确认提交一个或多个记录的更新。在刷新与第一和第二事务相关联的日志记录之前，释放第一和第二事务的事务锁。

6. 发明授权

US09165010B2 Logless atomic data movement 有权
标题翻译：无原则的原子数据运动
公开(公告)号：US09165010B2
公开(公告)日：2015-10-20
申请号：US13843986
申请日：2013-03-15
申请人： Franz Faerber , Juchang Lee , Ivan Schreter
发明人： Franz Faerber , Juchang Lee , Ivan Schreter
IPC分类号： G06F7/00 , G06F17/00 , G06F17/30
CPC分类号： G06F17/30371 , G06F3/0604 , G06F3/0638 , G06F3/0644 , G06F3/0647 , G06F3/065 , G06F3/0652 , G06F3/0673 , G06F3/0683 , G06F17/30117 , G06F17/30153 , G06F17/30315 , G06F17/30348 , G06F17/30377 , G06F17/30575 , G06F17/30587
摘要： A system and method of logless atomic data movement. An internal transaction is started within a multi-level storage architecture, the internal transaction to merge data from the first level storage structure to the second level storage structure. Committed data is read from a first level storage structure of the multi-level storage architecture as specified by the internal transaction. The committed data from the first level storage structure is inserted into a second level storage structure in a bulk insertion process, and the committed data is marked as being deleted from the first level storage. The internal transaction is then committed to the multi-level storage architecture when the committed data has been inserted into the second level storage structure.
摘要翻译：无原子数据运动的系统和方法。内部事务在多级存储架构内启动，内部事务将数据从第一级存储结构合并到第二级存储结构。从内部事务指定的多级存储架构的第一级存储结构读取提交的数据。来自第一级存储结构的提交的数据被插入到批量插入过程中的第二级存储结构中，并且所提交的数据被标记为从第一级存储器中删除。当提交的数据已插入到第二级存储结构中时，内部事务将被提交到多级存储架构。

7. 发明申请

US20150149736A1 FAST RESTART OF APPLICATIONS USING SHARED MEMORY 审中-公开
标题翻译：使用共享内存的快速重新启动应用程序
公开(公告)号：US20150149736A1
公开(公告)日：2015-05-28
申请号：US14242642
申请日：2014-04-01
申请人： Yong Sik Kwon , Jaeyun Noh , Juchang Lee , Ji Hoon Jang , Sang Kyun Cha
发明人： Yong Sik Kwon , Jaeyun Noh , Juchang Lee , Ji Hoon Jang , Sang Kyun Cha
IPC分类号： G06F3/06
CPC分类号： G06F3/0604 , G06F3/0655 , G06F3/0673 , G06F9/4401 , G06F9/442 , G06F9/445 , G06F9/461 , G06F9/485 , G06F9/52 , G06F9/544 , G06F13/1663 , G06F2003/0697
摘要： Technologies are described for restarting an application while maintaining data in memory (e.g., using shared memory). For example, shared memory can be associated with an application. The shared memory can also be associated with a holder process to maintain the shared memory from the time the application stops to the time the application starts again. When the application starts, the shared memory can be associated with the started application. In addition, restart of in-memory databases can be provided using shared memory. For example, in-memory data can be maintained when a database process or database management system stops and starts (e.g., during a restart).
摘要翻译：描述了在维护数据在存储器中（例如，使用共享存储器）时重新启动应用的技术。例如，共享内存可以与应用程序相关联。共享存储器还可以与保持器进程相关联，以在从应用程序停止的时间到应用程序再次启动时保持共享内存。当应用程序启动时，共享内存可以与启动的应用程序相关联。此外，可以使用共享内存来提供内存中数据库的重新启动。例如，当数据库进程或数据库管理系统停止并启动时（例如，在重新启动期间），可以维护内存中数据。

8. 发明授权

US09037677B2 Update protocol for client-side routing information 有权
标题翻译：更新客户端路由信息协议
公开(公告)号：US09037677B2
公开(公告)日：2015-05-19
申请号：US13449081
申请日：2012-04-17
申请人： Juchang Lee , Jaeyun Noh , Chulwon Lee , Michael Muehle , Alexander Schroeder , Marco Paskamp , Sang Kyun Cha
发明人： Juchang Lee , Jaeyun Noh , Chulwon Lee , Michael Muehle , Alexander Schroeder , Marco Paskamp , Sang Kyun Cha
IPC分类号： G06F15/16 , G06F17/30
CPC分类号： G06F17/30545
摘要： A system includes reception of a first query from a client device at a first database node of a database instance, determination of routing information associated with the first query, compilation of the first query at the first database node to generate first compiled code, transmission of the first compiled code and the routing information to the client device, reception of the compiled code from the client device at a second database node, determination, at the second database node, that data associated with the compiled query is associated with a third database node, transmission of the compiled code from the second database node to the third database node, reception of query results at the second database node from the third database node, and transmission of the query results and an indication to update the routing information from the second database node to the client device.
摘要翻译：系统包括在数据库实例的第一数据库节点处从客户端设备接收第一查询，确定与第一查询相关联的路由信息，在第一数据库节点处编译第一查询以生成第一编译代码，传输第一编译代码和到客户端设备的路由信息，在第二数据库节点从客户端设备接收编译代码，在第二数据库节点确定与编译查询相关联的数据与第三数据库节点将编译代码从第二数据库节点传输到第三数据库节点，从第三数据库节点接收第二数据库节点处的查询结果，以及发送查询结果以及从第二数据库更新路由信息的指示节点到客户端设备。

9. 发明申请

US20140244628A1 Hybrid Database Table Stored as Both Row and Column Store 审中-公开
公开(公告)号：US20140244628A1
公开(公告)日：2014-08-28
申请号：US14272769
申请日：2014-05-08
申请人： Yongsik Yoon , Chanho Jeong , Juchang Lee , Chang Bin Song , Yong Sik Kwon , Sang Kyun Cha
发明人： Yongsik Yoon , Chanho Jeong , Juchang Lee , Chang Bin Song , Yong Sik Kwon , Sang Kyun Cha
IPC分类号： G06F17/30
CPC分类号： G06F16/245 , G06F16/22 , G06F16/2365 , G06F16/278
摘要： A hybrid database table is stored as both a row and a column store. One or more techniques may be employed alone or in combination to enhance performance of the hybrid table by regulating access to, and/or the size of, the processing-intensive column store data. For example during an insert operation, the column store data may be searched for a uniqueness violation only after certain filtering and/or boundary conditions have been considered. In another technique, a hybrid table manager may control movement of data to the column store based upon considerations such as frequency of access, or underlying business logic. In still another technique, querying of the hybrid table may result in a search of the column store data only after an initial search of row store data fails to return a result.

10. 发明授权

US08793276B2 Client-side statement routing in distributed database 有权
标题翻译：分布式数据库中的客户端语句路由
公开(公告)号：US08793276B2
公开(公告)日：2014-07-29
申请号：US13449044
申请日：2012-04-17
申请人： Juchang Lee , Jaeyun Noh , Chulwon Lee , Michael Muehle , Alexander Schroeder , Marco Paskamp , Sang Kyun Cha
发明人： Juchang Lee , Jaeyun Noh , Chulwon Lee , Michael Muehle , Alexander Schroeder , Marco Paskamp , Sang Kyun Cha
IPC分类号： G06F17/30
CPC分类号： G06F17/30545 , G06F17/30477
摘要： A system includes reception of a first query from a client device at a first database node of a database instance comprising two or more database nodes, determination of a second database node of the two or more database nodes associated with the first query, compilation of the first query at the first database node to generate first compiled code, and transmission of the first compiled code and a first identifier of the second database node from the first database node to the client device.
摘要翻译：一种系统包括在包括两个或多个数据库节点的数据库实例的第一数据库节点处从客户端设备接收第一查询，确定与第一查询相关联的两个或多个数据库节点的第二数据库节点，在第一数据库节点处首先查询以生成第一编译代码，以及将第一编译代码和第二数据库节点的第一标识符从第一数据库节点传输到客户端设备。

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