摘要:
A method of routing dependent messages sent from a source node. The method comprises routing a plurality of messages including a plurality of dependent messages from a source node for processing by a group of a plurality of processing nodes, optionally while managing a failure recovery mechanism and complying with message dependencies. Each message having a weight, each dependent message is routed while at least one dependency thereof is complied with, acquiring a plurality of acknowledge notifications to at least some of the plurality of messages from the plurality of processing nodes, calculating, at the source node using a processor, a message load of each of the plurality of processing nodes according to the weight of respective messages of plurality of messages which are sent thereto and respective acknowledge notifications of the plurality of acknowledge notifications which are sent therefrom. The routing is performed according to the respective message load.
摘要:
A group communication service maintains synchronization limiting the group to the processing entities that receive a plurality of source message streams from sources outside the group and transmit delivery message streams to destinations that are outside the group. Synchronization of message ordering and other state synchronization directives are communicated from a leader exclusively to other group members. Once having declared themselves to be synchronized and active by a reply protocol message, which is an opaque object and is interpreted by an application layer, the processing entities independently process the source message streams in accordance with the order specified in the directives, without requiring additional sequencing information from another processing entity.
摘要:
A computer-implemented method, a computerized system and a product for providing a cluster of replicated servers. The method performed by a computerized server in a cluster of servers, wherein the cluster of servers are executing replicated instances of an application, wherein the replicated instances are configured to perform the same processing of the same input, comprising: detecting a message loss in the server; electively determining a responsive action to the message loss; and notifying the cluster of servers of the responsive action determined by the server, whereby other servers of the cluster of servers are able to mimic operation of the server by simulating the responsive action.
摘要:
Efficient Light-Weight Multicasting Communication Protocol A method for communication in a computing environment is provided. The method comprises transmitting a first data packet to one or more receiving units in a first set; receiving one or more acknowledgement messages (ACKs) from one or more receiving units in a second set, wherein the second set is a subset of the first set; removing the first data packet from a queue, in response to receiving at least one ACK from N receiving units within a time threshold; and re-transmitting the first data packet to the first set, in response to failing to receive at least one ACK from N receiving units within the time threshold.
摘要:
A method for server replication in a network environment is provided. The primary server provides a first service to a client. If the first service involves interaction with a non-deterministic data source, the primary server performs the interaction and provides information about the interaction to a secondary server that is a replica of the primary server. The secondary server uses the information about the interaction to synchronize the secondary server with the primary server.
摘要:
A method for communication in a computing environment is provided. The method comprises transmitting a first data packet to one or more receiving units in a first set; receiving one or more acknowledgement messages (ACKs) from one or more receiving units in a second set, wherein the second set is a subset of the first set; removing the first data packet from a queue, in response to receiving at least one ACK from N receiving units within a time threshold; and re-transmitting the first data packet to the first set, in response to failing to receive at least one ACK from N receiving units within the time threshold.
摘要:
A computer-implemented method, a computerized system and a product for providing a cluster of replicated servers. The method performed by a computerized server in a cluster of servers, wherein the cluster of servers are executing replicated instances of an application, wherein the replicated instances are configured to perform the same processing of the same input, comprising: detecting a message loss in the server; electively determining a responsive action to the message loss; and notifying the cluster of servers of the responsive action determined by the server, whereby other servers of the cluster of servers are able to mimic operation of the server by simulating the responsive action.
摘要:
A method for server replication in a network environment is provided. The primary server provides a first service to a client. If the first service involves interaction with a non-deterministic data source, the primary server performs the interaction and provides information about the interaction to a secondary server that is a replica of the primary server. The secondary server uses the information about the interaction to synchronize the secondary server with the primary server.
摘要:
A group communication service maintains synchronization limiting the group to the processing entities that receive a plurality of source message streams from sources outside the group and transmit delivery message streams to destinations that are outside the group. Synchronization of message ordering and other state synchronization directives are communicated from a leader exclusively to other group members. Once having declared themselves to be synchronized and active by a reply protocol message, which is an opaque object and is interpreted by an application layer, the processing entities independently process the source message streams in accordance with the order specified in the directives, without requiring additional sequencing information from another processing entity.
摘要:
A group communication service is adapted for multi-point to multi-point communication. Identical message streams are received by a tier of processing servers from a tier of sources. The processing servers deliver the message streams to a tier of destinations. The group communication service enables the processing servers to deal with newly added message streams and deleted message streams while preserving total ordering.