Abstract: A client/server computer architecture having a gap detector detecting gaps in sequence numbers of transactions transmitted by clients and processed by servers. When a gap is detected to thereby indicate that a respective transaction was transmitted but not processed, the client that originally transmitted the transaction is notified so that the client can retransmit the transaction.

Abstract: A high performance transaction storage and retrieval system supports an enterprise application requiring high volume transaction processing using commodity computers meeting business processing time budget requirements. The transaction storage and retrieval system is coupled to servers. The transaction storage and retrieval system includes input/output processes corresponding respectively to the servers and receiving transaction data from the servers, a memory, coupled to the input/output processes, receiving the transaction data from the input/output processes and storing the transaction data, disk writers coupled to the memory and corresponding respectively to the servers, and subpartition storage, coupled to the disk writers. The disk writers read the transaction data from the memory and store the transaction data in the subpartition storage. The subpartition storage is organized as flat files, each subpartition storage storing data corresponding to a subpartition of the transaction data.

Abstract: An in-memory file system supports concurrent clients allowing multiple updates on the same record by more than 1 of the clients, between commits, while maintaining commit integrity over a defined interval of processing. Moreover, a computer system processing transactions includes client computers concurrently transmitting messages. The computer system also includes servers, in communication with the client computers, receiving the messages, and in-memory databases, each in-memory database corresponding, respectively, to at least one of the servers, in which the servers store the messages in records of the respective in-memory databases, and the in-memory databases allow multiple updates on the same record by more than 1 of the client computers, between commits, while maintaining commit integrity over a defined interval of processing.

Abstract: A client/server computer architecture having a gap detector detecting gaps in sequence numbers of transactions transmitted by clients and processed by servers. When a gap is detected to thereby indicate that a respective transaction was transmitted but not processed, the client that originally transmitted the transaction is notified so that the client can retransmit the transaction.