Abstract: Various approaches for processing a B+ tree data structure are described. In one approach, a first data record is deleted from the database as part of processing a first transaction. After removing the first data record, it is determined whether a first data page from which the record was removed should be merged. If the first data page is to be merged, merging of the data page is delayed until after the first transaction has been committed. After committing the first transaction, a nested transaction is initiated to merge of the first data page, and the nested transaction is committed after the data page has been merged.

Abstract: A method and apparatus for sending a message from a first operator at a first workstation to a second operator at a second workstation in an operations-computing arrangement for operating one or more computer systems. The operations-computing arrangement includes the first and second workstations, which are coupled to respective operations servers. Each operations server is coupled to at least one computer system, each workstation executes software that provides an operator interface for operating a computer system, and each operations server provides an interface to a computer system. The infrastructure used to transmit system-generated event reports to operators at the workstations is used to transmit text messages between operators.

Abstract: Data transfer over an IP network is effected in a manner that improves the use of available communications channels and makes possible enhanced data routing control and monitoring. According to an example embodiment of the present invention, data is transferred over an IP network having a plurality of communication links. An origin node coupled to the network supplies data to the network, and system nodes coupled to the network are adapted to store at least a portion of the data supplied by the origin node. Two or more servers are adapted to route data between at least one of the system nodes and the network. A network-distributed application routing controller is implemented throughout the network and ascertains location information of the data supplied by the origin node. A data request from one of the system nodes is received at the application routing controller.