Abstract: Embodiments for speculative execution in a distributed streaming system by a processor. Incoming data from a data packet may be shared with one or more applications for immediate processing upon the incoming data becoming available on an input/output (I/O) interface to enable overlapping of computation and communication in the distributed streaming system. A validity of the shared incoming data may be indicated to the one or more applications.

Abstract: Embodiments for speculative execution in a distributed streaming system by a processor. Incoming data from a data packet may be shared with one or more applications for immediate processing upon the incoming data becoming available on an input/output (I/O) interface to enable overlapping of computation and communication in the distributed streaming system. A validity of the shared incoming data may be indicated to the one or more applications.

Abstract: A method, system and computer program product for remote direct memory access (RDMA) optimized producer-consumer message processing in a messaging hub is provided. The method includes initializing a shared memory region in memory of a host server hosting operation of a messaging hub. The initialization provides for a control portion and one or more data portions, the control portion storing an index to an available one of the data portions. The method also includes transmitting to a message producer an address of the shared memory region and receiving a message in one of the data portions of the shared memory region from the message producer by way of an RDMA write operation on a network interface of the host server. Finally, the method includes retrieving the message from the one of the data portions and processing the message in the messaging hub in response to the receipt of the message.

Abstract: In various embodiments a distributed computing node in a plurality of distributed computing nodes executes transactions in a distributed processing system. In one embodiment, a transaction commit message is received from a client computing node for a transaction. The transaction commit message includes at least an identifier of the transaction and a transaction sequence for the transaction. The transaction sequence indicates a sequence of execution for the transaction on the plurality of distributed computing nodes. An entry within the transaction sequence associated with the distributed computing node is identified. The entry includes a sequence number for executing the transaction on the distributed computing node with respect to other transactions. The transaction is executed based on the sequence number in the entry.

Abstract: In various embodiments a distributed computing node in a plurality of distributed computing nodes logs transactions in a distributed processing system. In one embodiment, a set of information associated with at least one transaction is recorded in a transaction log. At least a portion of memory in at least one information processing system involved in the transaction is accessed. The portion of memory is directly accessed without involving a processor of the at least one information processing system. The set of information from the transaction log is written to the portion of memory. The set of information is directly written to the portion of memory without involving a processor of the at least one information processing system.

Abstract: A method, system and computer program product for remote direct memory access (RDMA) optimized producer-consumer message processing in a messaging hub is provided. The method includes initializing a shared memory region in memory of a host server hosting operation of a messaging hub. The initialization provides for a control portion and one or more data portions, the control portion storing an index to an available one of the data portions. The method also includes transmitting to a message producer an address of the shared memory region and receiving a message in one of the data portions of the shared memory region from the message producer by way of an RDMA write operation on a network interface of the host server. Finally, the method includes retrieving the message from the one of the data portions and processing the message in the messaging hub in response to the receipt of the message.

Abstract: Various embodiments load balance service requests across one or more servers. In one embodiment, a service requestor directly accesses a shared metrics array stored in at least one server of a plurality of servers in a service cluster. Each of these servers includes one or more services. The shared metrics array is accessible by each of the plurality of servers, and includes a set of metrics for each of the plurality of servers. A determination is made based on the set of metrics associated with at least one server in the plurality of servers if a service request is to be sent to the at least one server. The service request is sent to the at least one server based on determining that the service request is to be sent to the at least one sever.

Abstract: Various embodiments load balance service requests across one or more servers. In one embodiment, a service requestor directly accesses a shared metrics array stored in at least one server of a plurality of servers in a service cluster. Each of these servers includes one or more services. The shared metrics array is accessible by each of the plurality of servers, and includes a set of metrics for each of the plurality of servers. A determination is made based on the set of metrics associated with at least one server in the plurality of servers if a service request is to be sent to the at least one server. The service request is sent to the at least one server based on determining that the service request is to be sent to the at least one sever.

Abstract: A method, system and computer program product for remote direct memory access (RDMA) optimized producer-consumer message processing in a messaging hub is provided. The method includes initializing a shared memory region in memory of a host server hosting operation of a messaging hub. The initialization provides for a control portion and one or more data portions, the control portion storing an index to an available one of the data portions. The method also includes transmitting to a message producer an address of the shared memory region and receiving a message in one of the data portions of the shared memory region from the message producer by way of an RDMA write operation on a network interface of the host server. Finally, the method includes retrieving the message from the one of the data portions and processing the message in the messaging hub in response to the receipt of the message.

Abstract: A data processing system includes a plurality of virtual machines each having associated memory pages; a shared memory page cache that is accessible by each of the plurality of virtual machines; and a global hash map that is accessible by each of the plurality of virtual machines. The data processing system is configured such that, for a particular memory page stored in the shared memory page cache that is associated with two or more of the plurality of virtual machines, there is a single key stored in the global hash map that identifies at least a storage location in the shared memory page cache of the particular memory page. The system can be embodied at least partially in a cloud computing system.

Abstract: Various embodiments load balance service requests across one or more servers. In one embodiment, a service requestor directly accesses a shared metrics array stored in at least one server of a plurality of servers in a service cluster. Each of these servers includes one or more services. The shared metrics array is accessible by each of the plurality of servers, and includes a set of metrics for each of the plurality of servers. A determination is made based on the set of metrics associated with at least one server in the plurality of servers if a service request is to be sent to the at least one server. The service request is sent to the at least one server based on determining that the service request is to be sent to the at least one sever.

Abstract: Various embodiments load balance service requests across one or more servers. In one embodiment, a service requestor directly accesses a shared metrics array stored in at least one server of a plurality of servers in a service cluster. Each of these servers includes one or more services. The shared metrics array is accessible by each of the plurality of servers, and includes a set of metrics for each of the plurality of servers. A determination is made based on the set of metrics associated with at least one server in the plurality of servers if a service request is to be sent to the at least one server. The service request is sent to the at least one server based on determining that the service request is to be sent to the at least one sever.

Abstract: Various embodiments load balance service requests across one or more servers. In one embodiment, a service requestor directly accesses a shared metrics array stored in at least one server of a plurality of servers in a service cluster. Each of these servers includes one or more services. The shared metrics array is accessible by each of the plurality of servers, and includes a set of metrics for each of the plurality of servers. A determination is made based on the set of metrics associated with at least one server in the plurality of servers if a service request is to be sent to the at least one server. The service request is sent to the at least one server based on determining that the service request is to be sent to the at least one sever.

Abstract: For remote direct memory access (RDMA) by a client to a data record stored in a cache on a server, a hash map is received by a client from a server. The hash map includes one or more entries associated with a key for the data record stored in the cache on the server that stores a server-side remote pointer referencing the data record stored in the cache on the server. The client, using the key, looks up the server-side remote pointer for the data record from the hash map, and then performs one or more RDMA operations using the server-side remote pointer that allow the client to directly access the data record stored in the cache on the server.

Abstract: Various embodiments load balance service requests across one or more servers. In one embodiment, a service requestor directly accesses a shared metrics array stored in at least one server of a plurality of servers in a service cluster. Each of these servers includes one or more services. The shared metrics array is accessible by each of the plurality of servers, and includes a set of metrics for each of the plurality of servers. A determination is made based on the set of metrics associated with at least one server in the plurality of servers if a service request is to be sent to the at least one server. The service request is sent to the at least one server based on determining that the service request is to be sent to the at least one sever.

Abstract: Various embodiments load balance service requests across one or more servers. In one embodiment, a service requestor directly accesses a shared metrics array stored in at least one server of a plurality of servers in a service cluster. Each of these servers includes one or more services. The shared metrics array is accessible by each of the plurality of servers, and includes a set of metrics for each of the plurality of servers. A determination is made based on the set of metrics associated with at least one server in the plurality of servers if a service request is to be sent to the at least one server. The service request is sent to the at least one server based on determining that the service request is to be sent to the at least one sever.

Abstract: A server and/or a client stores a metadata hash map that includes one or more entries associated with keys for data records stored in a cache on a server. Each of the entries stores metadata for a corresponding data record, wherein the metadata comprises a server-side remote pointer that references the corresponding data record stored in the cache, as well as a version identifier for the key. A selected data record is accessed using a provided key by: (1) identifying potentially matching entries in the metadata hash map using the provided key; (2) accessing data records stored in the cache using the server-side remote pointers from the potentially matching entries; and (3) determining whether the accessed data records match the selected data record using the provided key and the version identifiers from the potentially matching entries.

Abstract: A server and/or a client stores a metadata hash map that includes one or more entries associated with keys for data records stored in a cache on a server. Each of the entries stores metadata for a corresponding data record, wherein the metadata comprises a server-side remote pointer that references the corresponding data record stored in the cache, as well as a version identifier for the key. A selected data record is accessed using a provided key by: (1) identifying potentially matching entries in the metadata hash map using the provided key; (2) accessing data records stored in the cache using the server-side remote pointers from the potentially matching entries; and (3) determining whether the accessed data records match the selected data record using the provided key and the version identifiers from the potentially matching entries.

Abstract: A method, system and computer program product for remote direct memory access (RDMA) optimized producer-consumer message processing in a messaging hub is provided. The method includes initializing a shared memory region in memory of a host server hosting operation of a messaging hub. The initialization provides for a control portion and one or more data portions, the control portion storing an index to an available one of the data portions. The method also includes transmitting to a message producer an address of the shared memory region and receiving a message in one of the data portions of the shared memory region from the message producer by way of an RDMA write operation on a network interface of the host server. Finally, the method includes retrieving the message from the one of the data portions and processing the message in the messaging hub in response to the receipt of the message.

Abstract: A method, system and computer program product for remote direct memory access (RDMA) optimized producer-consumer message processing in a messaging hub is provided. The method includes initializing a shared memory region in memory of a host server hosting operation of a messaging hub. The initialization provides for a control portion and one or more data portions, the control portion storing an index to an available one of the data portions. The method also includes transmitting to a message producer an address of the shared memory region and receiving a message in one of the data portions of the shared memory region from the message producer by way of an RDMA write operation on a network interface of the host server. Finally, the method includes retrieving the message from the one of the data portions and processing the message in the messaging hub in response to the receipt of the message.