Abstract: A method, system and computer program product for providing consolidated access to data of a plurality of source databases. Tables of each of the source databases are replicated to a shared accelerator. The source DBMSs are configured to dispatch queries to the accelerator for accelerating query execution. The accelerator is configured such that the replicated tables can only be accessed by the source DBMS having provided said tables for executing a dispatched query. A user can select one of the source DBMSs to act as a consolidated DBMS—C-DBMS. The C-DBMS provides the consolidated access. The user is enabled to select tables managed by another one of the DBMSs. In response to receiving the selection of the tables, the accelerator is re-configuring such that the C-DBMS is granted access also to the copies of the selected tables in the accelerator.

Abstract: A processor(s) initiates a database transaction, in a computing environment that includes a database that includes one or more memory devices. The processor(s) forks a first address space that represents a current state of the database, to create a second address space. The processor(s) writes an entry indicating timing of the initiating to a log file and generates a file that is mapped to the one or more memory devices. The file includes differences in state between the current state of the database and a state subsequent to executing and committing the database transaction, and a timestamp indicating timing for committing the database transaction. The processor(s) write the database transaction to the second address space.

Abstract: Secure operations are performed on encrypted code. A processor in a first operating mode obtains encrypted code. The processor switches from the first operating mode to a second operating mode, and decrypts the encrypted code to obtain decrypted code. The decrypted code is executed, based on the processor being in the second operating mode, to provide a result. The result is encrypted, and the encrypted result is sent to a user, based on the processor switching back to the first operating mode.

Abstract: A method for distributed training in a parameter dataset; the method for at least one coordinating node; a network of at least one distributed node; receiving a parameter dataset from a first distributed node; decrypting the received dataset; training the parameter dataset based on a training data record to obtain a trained parameter dataset; and forwarding the trained parameter dataset to a second distributed node.

Abstract: A multiprocessor computer system facility is provided for selectively reallocating a logical processing unit. The logical processing unit is one logical processing unit of multiple logical processing units backed by a socket of a plurality of sockets of a multiprocessor computer system. The selectively reallocating includes: monitoring, during execution of program code, a performance metric of a hardware resource of the socket, the hardware resource being shared by the multiple logical processing units; and reassigning the logical processing unit, based on the monitoring, to a different socket of the plurality of sockets of the multiprocessor computer system to, in part, improve the performance metric of the hardware resource of the socket. The reassigning includes reassigning the logical processing unit based on the monitoring determining that a differential between a resource utilization rate of the socket and a resource utilization rate of the different socket exceeds a set threshold.

Abstract: A method, system and computer program product for providing consolidated access to data of a plurality of source databases. Tables of each of the source databases are replicated to a shared accelerator. The source DBMSs are configured to dispatch queries to the accelerator for accelerating query execution. The accelerator is configured such that the replicated tables can only be accessed by the source DBMS having provided said tables for executing a dispatched query. A user can select one of the source DBMSs to act as a consolidated DBMS-C-DBMS. The C-DBMS provides the consolidated access. The user is enabled to select tables managed by another one of the DBMSs. In response to receiving the selection of the tables, the accelerator is re-configuring such that the C-DBMS is granted access also to the copies of the selected tables in the accelerator.

Abstract: A method, system and computer program product for providing consolidated access to data of a plurality of source databases. Tables of each of the source databases are replicated to a shared accelerator. The source DBMSs are configured to dispatch queries to the accelerator for accelerating query execution. The accelerator is configured such that the replicated tables can only be accessed by the source DBMS having provided said tables for executing a dispatched query. A user can select one of the source DBMSs to act as a consolidated DBMS—C-DBMS. The C-DBMS provides the consolidated access. The user is enabled to select tables managed by another one of the DBMSs. In response to receiving the selection of the tables, the accelerator is re-configuring such that the C-DBMS is granted access also to the copies of the selected tables in the accelerator.

Abstract: A method, system and computer program product for providing consolidated access to data of a plurality of source databases. Tables of each of the source databases are replicated to a shared accelerator. The source DBMSs are configured to dispatch queries to the accelerator for accelerating query execution. The accelerator is configured such that the replicated tables can only be accessed by the source DBMS having provided said tables for executing a dispatched query. A user can select one of the source DBMSs to act as a consolidated DBMS—C-DBMS. The C-DBMS provides the consolidated access. The user is enabled to select tables managed by another one of the DBMSs. In response to receiving the selection of the tables, the accelerator is re-configuring such that the C-DBMS is granted access also to the copies of the selected tables in the accelerator.

Abstract: Embodiments of the invention are directed to methods for improving performance of a multi-core processor. The method includes increasing a first operating frequency to a first elevated operating frequency of a first core of a gang of cores, the gang of cores comprising a plurality of cores of the multi-core processor. The method further includes upon a determination that an operating temperature of the first core is above a threshold temperature, switching processing of a thread from the first core to a second core in the gang of cores. The method further includes reducing the first operating frequency of the first core. The method further includes increasing the operating frequency of the second core to a second elevated operating frequency.

Abstract: Storing data in a distributed database management system. The distributed database management system includes a first set of database tables, wherein data of a logical database table is distributed among the first set of database tables according to a first distribution key. A second set of database tables is maintained using a second distribution key that is different from the first distribution key. Furthermore, at least one performance metric value for the stored query when executing a query is maintained, and the second distribution key is determined based on the at least one performance metric value.

Abstract: In an approach for processing data in a database management system, a processor performs a delete operation on a first data container, wherein the first data container includes one or more data records and wherein the delete operation logically deletes at least one data record of the one or more data records. A processor associates a time of the performed delete operation with the first data container. A processor performs a write operation on a first data record of the first data container. A processor associates a time of the performed write operation with the first data record of the first data container. Responsive to receiving a database query directed at the first data container, a processor grants access to the first data record of the first data container based on, at least, the time of the performed write operation being chronologically after the time of the performed delete operation.

Abstract: A distributed database system (or federated database system) where a catalog is used to store metadata descriptive of data containers for the constituent database system(s) and/or accelerator system(s) of the federated database. In response to the generation of the trigger signal corresponding to a database definition language (DDL) statement, the accelerator system updates metadata in the catalog.

Abstract: A method, system and computer program product for providing consolidated access to data of a plurality of source databases. Tables of each of the source databases are replicated to a shared accelerator. The source DBMSs are configured to dispatch queries to the accelerator for accelerating query execution. The accelerator is configured such that the replicated tables can only be accessed by the source DBMS having provided said tables for executing a dispatched query. A user can select one of the source DBMSs to act as a consolidated DBMS—C-DBMS. The C-DBMS provides the consolidated access. The user is enabled to select tables managed by another one of the DBMSs. In response to receiving the selection of the tables, the accelerator is re-configuring such that the C-DBMS is granted access also to the copies of the selected tables in the accelerator.

Abstract: A processor(s) initiates a database transaction, in a computing environment that includes a database that includes one or more memory devices. The processor(s) forks a first address space that represents a current state of the database, to create a second address space. The processor(s) writes an entry indicating timing of the initiating to a log file and generates a file that is mapped to the one or more memory devices. The file includes differences in state between the current state of the database and a state subsequent to executing and committing the database transaction, and a timestamp indicating timing for committing the database transaction. The processor(s) write the database transaction to the second address space.

Abstract: A processor(s) initiates a database transaction, in a computing environment that includes a database that includes one or more memory devices. The processor(s) forks a first address space that represents a current state of the database, to create a second address space. The processor(s) writes an entry indicating timing of the initiating to a log file and generates a file that is mapped to the one or more memory devices. The file includes differences in state between the current state of the database and a state subsequent to executing and committing the database transaction, and a timestamp indicating timing for committing the database transaction. The processor(s) write the database transaction to the second address space.

Abstract: A method for merging transactions for execution by a database management system. The method includes a computer processor receiving a database query that is comprised of a plurality of transactions. The method further includes a computer processor placing each of the plurality of transactions, of the database query, in respective chronological order, in a scheduling queue. The method further includes a computer processor determining that at least a first transaction and a second transaction within the plurality of transactions each contains one or more transaction delineation descriptions. The method further includes computer processor responding to the determination that the first transaction and the second transaction, within the plurality of transactions, each contains one or more transaction delineation descriptions, and merging the first transaction and the second transaction to create a merged transaction combination and merging also includes combining two or more table-scan operations.

Abstract: A distributed database system (or federated database system) where a catalogue is used to store metadata descriptive of data containers for the constituent database system(s) and/or accelerator system(s) of the federated database. In response to the generation of the trigger signal corresponding to a database definition language (DDL) statement, the accelerator system updates metadata in the catalogue.

Abstract: Computer system and method are provided which include or utilize first and second databases, and a receiver for receiving online data. The first database stores received online data in a first data structure, and the second database stores the online data in a second data structure, with the second structure being obtained by applying a transformation to the online data in the first data structure. The system also has a software component for generating an analytical model using at least part of the online data stored in the second database, and a processor and memory storing a plurality of applications that are executable on the processor, where a mapping application includes instructions that, when executed, cause at runtime the processor to automatically retrieve at least part of the online data from the second database, and store in a storage of the system the retrieved online data.

Abstract: A method for merging transactions for execution by a database management system. The method includes a computer processor receiving a database query that is comprised of a plurality of transactions. The method further includes a computer processor placing each of the plurality of transactions, of the database query, in respective chronological order, in a scheduling queue. The method further includes a computer processor determining that at least a first transaction and a second transaction within the plurality of transactions each contains one or more transaction delineation descriptions. The method further includes computer processor responding to the determination that the first transaction and the second transaction, within the plurality of transactions, each contains one or more transaction delineation descriptions, and merging the first transaction and the second transaction to create a merged transaction combination and merging also includes combining two or more table-scan operations.

Abstract: A method for merging transactions for execution by a database management system. The method includes a computer processor receiving a database query that is comprised of a plurality of transactions. The method further includes a computer processor placing each of the plurality of transactions, of the database query, in respective chronological order, in a scheduling queue. The method further includes a computer processor determining that at least a first transaction and a second transaction within the plurality of transactions each contains one or more transaction delineation descriptions. The method further includes computer processor responding to the determination that the first transaction and the second transaction, within the plurality of transactions, each contains one or more transaction delineation descriptions, and merging the first transaction and the second transaction to create a merged transaction combination and merging also includes combining two or more table-scan operations.