Abstract: An example method of submitting a federated query to one or more data sources belonging to a federation includes splitting a zone into a plurality of zone subsets. The zone includes a plurality of data sources belonging to a federation. The plurality of zone subsets has disjoint sets of data sources belonging to the federation. The method also includes receiving a federated query from a client. The federated query includes a plurality of source queries. Each source query of the plurality of source queries is specific to an autonomous data source belonging to the federation. The method further includes determining the client's assigned zone subset of the plurality of zone subsets. The method also includes submitting the federated query to the client's assigned zone subset. The plurality of source queries is submitted to one or more data sources in the zone subset to which the client is assigned.

Abstract: A system and method of batch query processing includes accumulating data queries in a query holding area of a query assistant running in a computer server, separating the accumulated data queries into a plurality of partitions, ordering the partitions, ordering the accumulated data queries within each of the partitions, and processing the accumulated data queries in an order based on the ordering of the partitions and the ordering of the data queries within each of the partitions. Each of the partitions includes data queries with a respective from-type. Each respective from-type is associated with a combination of storage tables accessed by each of the data queries in a corresponding partition. In some examples, ordering the accumulated data queries within each of the partitions includes processing the data queries in each partition against a test data set and ordering the data queries based on results of the processing.

Abstract: A system and method of managing cache units includes providing, by a first cache unit, caching services to a first plurality of clients, collecting information associated with a usage of the first cache unit by the first plurality of clients, determining a similarity in cache usage between every pair of clients selected from the first plurality of clients based on information associated with the collected information, selecting a second plurality of clients from the first plurality of clients based on information associated with the determined similarity in cache usage, replicating the first cache unit to create a second and a third cache unit, providing, by the second cache unit, caching services to the second plurality of clients, and providing, by the third cache unit, caching services to one or more third clients selected from the first plurality of clients, each of the third clients not being in the second plurality of clients.

Abstract: Providing messages for Java message service (JMS) is disclosed. A described method includes determining timestamp information associated with a first Java™ message service (JMS) message. The timestamp information represents a time when the JMS message is either generated or received by a processing device. The method also includes determining destination information associated with the JMS message. The method further includes converting the JMS message into a first key-value data pair having a key data and a value data. The key data includes the timestamp information and the value data includes the destination information of the first JMS message.

Abstract: A method performed by a server computing system includes generating an operation for a web service, the operation corresponding to at least one main method of a console application, receiving input data from a client device through the operation, writing the input data to a memory store, executing the console application using the input data of the memory store, injecting code into the console application, the code to change input/output streams from a console input/output to the memory store. The method further includes writing an output of the console application to the memory store.

Abstract: A method performed by a computing system includes creating a graph, wherein nodes of the graph represent data objects of a data storage cluster, wherein edges of the graph represent joins between data objects represented by both nodes of respective edges, wherein node values of the nodes and weights of the edges are based on statistics related to use of the data objects. The method further includes assigning a first subset of the data objects to a relational database storage node within the data storage cluster, the first subset of data objects being represented by nodes within a cluster of the graph, and assigning a second subset of the data objects to a non-relational database storage node within the data storage cluster, the second subset of data objects being represented by nodes within the graph that are not part of a cluster.

Abstract: A method for using a retain block in application code executing on a virtual machine includes identifying an instruction in application code, the instruction pertaining to an object, determining the instruction is part of a retain block, prior to executing the instruction, determining whether the instruction is to cause the object to be modified, and when the instruction is to cause the object to be modified, storing data indicating a first state of the object in a retain block store and causing the first state of the object to be modified using a second state. Also, the method includes in response to an error occurring during an execution of the instruction, returning the object from the second state to the first state using the stored data.

Abstract: A system and method of managing immutable objects includes monitoring new object construction, detecting construction of an object, determining a key for the object, looking the key up in a persistent storage system, when the key is found in the persistent storage system, loading the object from the persistent storage system, and when the key is not found in the persistent storage system constructing the object, determining whether the object is immutable, and storing the object in the persistent storage system when the object is immutable. In some examples, determining whether the object is immutable includes examining each primitive type data member of the object, examining each reference type constructor parameter of the object to determine whether the reference type constructor parameter is defensively copied, examining all function calls used by the object to determine whether the function calls preserve immutability, and recursively examining each reference type data member of the object.

Abstract: A mechanism for managing failure of applications in a distributed environment is disclosed. A method includes detecting failure in an application node among a plurality of application nodes when the application node does not respond to a status message. The method further includes routing, by enterprise application nexus application processing interface (EANA) module, a first lock message to the failed application node and ancestors' nodes of the failed application node when the failed application node is an aware application node.

Abstract: A mechanism for providing messages for Java message service (JMS). A method includes receiving, by a Java message service (JMS) server executed by a processing device, key-value data pair. The key-value data pair is sent by a client. The method also includes extracting, by the processing device, destination information of a JMS message from the value data of the key-value data pair. The destination information is either a JMS queue or a JMS topic. The method further includes storing, by the processing device, the key-value data pair in a column family of not only structured query language (NoSQL) database when one of the JMS queue or the JMS topic associated with the received key-value data pair exists in the column family of the NoSQL database. The column family includes a plurality of stored key-value data pairs.

Abstract: A system and method of cluster debugging includes detecting debug events occurring in one or more first virtual machines, storing debug records, each of the debug records including information associated with a respective debug event selected from the debug events and a timestamp associated with the respective debug event, merging the debug records based on information associated with each timestamp, starting one or more second virtual machines, each of the one or more second virtual machines emulating a selected one of the one or more first virtual machines, synchronizing the one or more second virtual machines, retrieving the merged debug records, and playing the merged debug records back in chronological order on the one or more second virtual machines. In some examples, the method further includes collecting clock synchronization records. In some examples, merging the debug records includes altering an order of one or more of the debug records based on the clock synchronization records.

Abstract: An example method for routing a message in a dynamic service mesh includes receiving at a mesh point a first message from a sender service and determining, based on a routing table, whether the mesh point has previously received a second message from the sender service. When the mesh point is determined to not have received the second message from the sender service, the first message is routed to a target service in the dynamic service mesh. The method includes receiving an indication of whether the first message has been accepted by the target service and updating the routing table based on the indication. When the indication indicates that the first message has been rejected by the target service, the first message is routed from the mesh point to a second target service.

Abstract: An example method of integrating a plurality of heterogeneous peer-to-peer communication participants includes retrieving from a first input queue coupled to a duplex service a first message. The first message includes a message identifier and is from a sender. The method also includes applying a first operation on the first message, determining a first output of the first message based on the first operation, and sending the first output of the first message to a target. The method further includes retrieving from a second input queue coupled to the duplex service a second message. The second message includes the message identifier and is from a target. The method also includes applying a second operation on the second message, determining a second output of the second message based on the second operation, and sending the second output of the second message to the sender.

Abstract: An example system for processing a federated query includes a query proxy that receives a federated query including a plurality of source queries and receives an indication that a failed set of one or more source queries failed to execute successfully. Each source query is specific to an autonomous data source belonging to a federation. The system also includes a data federation engine that identifies a plurality of autonomous data sources to which to send the plurality of source queries. The plurality of autonomous data sources belong to the federation. The system further includes a query fail analyzer that updates a data structure to reflect the unsuccessful execution of one or more source queries of the failed set.

Abstract: A system and method of batch query processing includes accumulating data queries in a query holding area of a query assistant running in a computer server, separating the accumulated data queries into a plurality of partitions, ordering the partitions, ordering the accumulated data queries within each of the partitions, and processing the accumulated data queries in an order based on the ordering of the partitions and the ordering of the data queries within each of the partitions. Each of the partitions includes data queries with a respective from-type. Each respective from-type is associated with a combination of storage tables accessed by each of the data queries in a corresponding partition. In some examples, ordering the accumulated data queries within each of the partitions includes processing the data queries in each partition against a test data set and ordering the data queries based on results of the processing.

Abstract: Implementations for query data splitting are disclosed. In one example, the method includes receiving, by a processing device, a first query and a second query, determining that the second query is a subset of the first query, determining a first set of attributes associated with the first query and a second set of attributes associated with the second query, and determining, by the processing device, whether to submit the second query or the first query to a database in view of the first set of attributes and the second set of attributes.

Abstract: A cache system stores a number of different datasets. The cache system includes a number of cache units, each in a state associated with one of the datasets. In response to determining that a hit ratio of a cache unit drops below a threshold, the state of the cache unit is changed and the dataset is replaced with that associated with the new state.

Abstract: A processor may perform conditional just-in-time (JIT) compilation. An example method may comprise: identifying, by the processor, a defined pattern in a byte stream derived from a high level programming language module; evaluating a conditional expression associated with the defined pattern, wherein the conditional expression comprises an execution platform identifier; and compiling the byte stream into a native code, while excluding, in view of the evaluating, a portion of byte stream associated with the defined pattern.

Abstract: A method and system for processing a request is provided. An example system includes a security module that authenticates a request from a client. The system also includes a Web service that determines whether the set of operations includes an input/output (I/O) operation and determines whether a result of the authentication has been determined. While the request is pending authentication, the Web service may initiate processing of the request and may ensure that no I/O operations are performed within the processing of the request until a request of the authentication has been determined.

Abstract: A system and method of querying hybrid multi data sources includes receiving a query at a hybrid multi data source running on a computer server, creating a list of data sources, filtering the list of data sources based on data source hints included in the query, filtering the list of data sources based on data source rules, forming one or more query plans for processing the query, evaluating each of the query plans, selecting a first query plan from the query plans based on results of the evaluating, and performing the first query plan. Each query plan corresponds to a data source in the filtered list of data sources. In some examples, the first query plan has a lowest cost of each of the query plans. In some examples, the first query plan is based on probabilities associated with the cost of each of the query plans.