公开(公告)号：AT514993T

公开(公告)日：2011-07-15

申请号：AT03769672

申请日：2003-10-27

Applicant: IBM

Inventor： BIRAN OFER ,  HARPER RICHARD ,  KRISHNAKUMAR SRIRAMA ,  MACKENZIE BRUCE ,  PRUETT GREGORY ,  YASSOUR BEN-AMI

IPC: G06F9/50 ,  H04L29/06 ,  H04L29/08

Abstract: Power and redundancy management policies are applied individually to the tiers of redundant servers of an application service such that power is reduced while maintaining a high level of system availability. Servers which are determined to be relatively inactive are moved to a free pool. Certain servers of the free pool are maintained in a hot standby state, while others are powered-off or set to operate in a low power mode. During times of high load, the servers in the hot standby state can be provisioned quickly into the application service.

公开(公告)号：AT453895T

公开(公告)日：2010-01-15

申请号：AT02703745

申请日：2002-03-06

Applicant: IBM

Inventor： MILLS NATHANIEL ,  KRUEGER LEROY ,  KRISHNAKUMAR SRIRAMA ,  SQUILLANTE MARK ,  HELLERSTEIN JOSEPH

IPC: G06F11/34 ,  H04L12/24 ,  H04L29/06 ,  H04L29/08

Abstract: Techniques for use in accordance with application performance decomposition are provided which take advantage of the communications protocol used to carry a transaction between application components in a distributed computing network. Specifically, the invention extends the communications protocol by embedding data, such as timestamp and duration measurement data, in the protocol itself, rather than extending or altering the application or transaction data carried by the protocol as in existing approaches. Thus, the invention provides natural correlation of interactions of distributed application components on such transactions without modification to the application or transaction data. Because the correlation is performed in-line with the application component interactions, minimal data management overhead is required, and correlated performance decomposition is made possible in real-time for the transaction. Furthermore, subsequent processing stages of the distributed application can interpret the communications protocol to glean processing durations of previous stages in order to make decisions regarding treatment of the transaction.