Multiple systems coupling incurs performance degradation due to inter-system (global) lock conlention and database buffer invalidation. At high transaction rates, the level of inter-syslem interference can have a severe hnpact on performance. In this paper, we propose a scheme for transaction routing lhat reduces inter-system interference while keeping load nearly balanced. The routing decision...

In e-commerce, different payment transactions have different levels of risk. Risk is generally higher for digital goods, but it also differs based on product and its popularity, the offer type (packaged game, virtual currency to a game or subscription service), storefront and geography. Existing fraud policies and models make decisions independently for each transaction based on transaction att...

Mining association rule in event sequences is an important data mining problem with many applications. Most of previous studies on association rules are on mining intra-transaction association, which consider only relationship among the item in the same transaction. However, intra-transaction association rules are not a suitable for trend prediction. Therefore, inter-transaction association is ...

Most parallel databases exploit two types of parallelism: intra-query parallelism and inter-transaction concurrency. Between these two cases lies another type of parallelism: inter-query parallelism within a transaction or application. Exploiting inter-query parallelism requires either compiler support to automatically parallelize the existing embedded query programs, or programming support to ...

Concurrent trace programs (CTPs) are slices of the concurrent programs that generate the concrete program execution traces, where inter-thread event order specific to the given traces are relaxed. For such CTPs, we introduce transaction sequence graph (TSG) as a model for efficient concurrent data flow analysis. The TSG is a digraph of thread-local control nodes and edges corresponding to trans...

Calvin is a transaction scheduling and replication management layer for distributed storage systems. By first writing transaction requests to a durable, replicated log, and then using a concurrency control mechanism that emulates a deterministic serial execution of the log’s transaction requests, Calvin supports strongly consistent replication and fully ACID distributed transactions while incur...

We present an authentication and key agreement protocol to secure Voice over IP call establishment between interconnection proxies of different domains. The protocol operates on a transaction basis. Each transaction is defined as the set of operations and data required to send an authenticated message from a sender to a responder. A transaction allows a sender to either transmit a cryptographic...