In accordance with an embodiment, described herein is a system and method for automatic migration of poller proxy services in a service bus environment. A singleton service framework component keeps a poller singleton application running on any of the managed servers in the cluster. The poller singleton application is registered with a cluster change listener, which listens for any state change in the cluster. Each poller proxy service is homogeneously deployed on each managed server in the cluster, and is associated with a poller engine configured to run on a particular managed server. When a managed server fails, the poller singleton application can migrate each poller engine configured to run on the failed managed server, to a running managed server, based on a preferred server list of the poller proxy service associated with that poller engine.

A server including request handlers each having a unique handler identifier. The server receiving client service requests, each client service request including a handler identifier, and for each client service request, selecting the request handler corresponding to the handler identifier. The selected request handler implements a predefined procedure to process the client service request including to send a handler service request to a destination server initially selected from a predetermined group of destination servers, the handler service request including a handler identifier, and to receive a response message, including response data, from the initially selected destination server in response to the handler service request. Based on the response data, the predefined procedure to send a reply message to the client, or to send a new handler service request to a destination server newly selected from the predetermined group of destination servers, the new handler service request including a handler identifier.

A method and apparatus for optimizing the use of CPNS entities are discussed. According to an embodiment, a method includes receiving, by a CPNS server, a low battery level indication for an operation from a certain one of CPNS entities; requesting, by the CPNS server, battery level information from at least some of the CPNS entities in response to the low battery level indication; determining, by the CPNS server, life expectancy information for each of the at least some of the CPNS entities based on the battery level information; and transmitting, by the CPNS server, a message to at least one CPNS gateway to use one of the at least some of the CPNS entities instead of the certain one of the CPNS entities to perform the operation, based on the life expectancy information.

A system and method for performance-based generation of content for a component referenced for display within a webpage have been provided. The system includes a server having a processor and a memory that includes instructions executable by the processor to receive a request from a client application executing on a client device for content for the component and to transmit a response to the client device. The response is based on performance measurements of prior requests for the content and is used by the client application to render the component on a display connected to the client device.

A method and a system for reconstructing a slot table for Network File System (NFS) based distributed file systems are provided herein. The method includes: receiving a retried request from a client at a node of the distributed file system; in a case that the retried request is of a re-enter idempotent type, processing the request again; in a case that the retried request is file state related, checking in already opened file handles if they are open with exactly same properties already exist for the particular client, and if found, returning the file handle information to the client as if it was just opened by it; and in a case that the retried request is of a non-idempotent type attempting to perform the operation again, wherein if the source file does not exist, checking the existence of the expected outcome, and replying with a success.

A computing environment, such as a cloud computing environment, may include nodes performing NAT for a plurality of workloads. An active node performs NAT for the workloads, including maintaining a NAT table. The active node may create sub-interfaces for the workloads and function as a DHCP server. The NAT table and sub-interfaces may be recreated on a standby node. Upon detecting failure, a routing table is updated to direct workloads to connect to the standby node and traffic may continue to be processed by the standby node without disrupting network or application sessions.

A method and system for managing a large number of servers and their server components distributed throughout a heterogeneous computing environment is provided. In one embodiment, an authenticated user, such as a IT system administrator, can securely and simultaneously control and configure multiple servers, supporting different operating systems, through a “virtual server.” A virtual server is an abstract model representing a collection of actual target servers. To represent multiple physical servers as one virtual server, abstract system calls that extend execution of operating-system-specific system calls to multiple servers, regardless of their supported operating systems, are used. A virtual server is implemented by a virtual server client and a collection of virtual server agents associated with a collection of actual servers.

Various embodiments of methods and apparatus for load balancing requests such that target resources serve a single client are described. In at least some embodiments, a single resource, such as a compute instance, is assigned to only one client, and that single resource is used for all subsequent connections and communications from that client. Some embodiments comprise a resource selection system which provides identifying information of an available resource, in order for a connection to be established between the client and the resource. The resource selection system then removes that identifying information from its memory. In some of these embodiments, a routing layer interfaces with the resource selection system to establish the connection between the client and the available resource. When a client is assigned to a resource, other clients may be prevented from establishing connections with the resource.

Various embodiments of methods and apparatus for load balancing requests such that target resources serve a single client are described. In at least some embodiments, a single resource, such as a compute instance, is assigned to only one client, and that single resource is used for all subsequent connections and communications from that client. Some embodiments comprise a resource selection system which provides identifying information of an available resource, in order for a connection to be established between the client and the resource. The resource selection system then removes that identifying information from its memory. In some of these embodiments, a routing layer interfaces with the resource selection system to establish the connection between the client and the available resource. When a client is assigned to a resource, other clients may be prevented from establishing connections with the resource.

The present disclosure relates to an automatic switching method and an automatic switching system. The automatic switching method includes: an automatic switching device monitoring in real time a service state of an operation server; when the automatic switching device monitors that the operation server has terminated providing service for a client terminal, the automatic switching device sending to the operation server a switching instruction for switching a current configuration of the operation server and sending to a backup server a notification message for switching a current configuration of the backup server; and the backup server switching the current configuration of the backup server to a preset first configuration according to the notification message, and providing service for the client terminal; wherein the first configuration is the configuration of the operation server when the operation server provided service.