公开(公告)号：CA2426439A1

公开(公告)日：2004-10-23

申请号：CA2426439

申请日：2003-04-23

Applicant: IBM CANADA

Inventor： VAN BOESCHOTEN ROBIN D ,  SCHIEFER BERNHARD K ,  MARTIN PAT ,  ELNAFFAR SAID ,  HORMAN RANDALL W ,  LIGHTSTONE SAM S

IPC: G06F16/90 ,  G06F9/50 ,  G06F17/30 ,  G06F17/60

Abstract: Workload type to be managed by a database management system (DBMS) is a key consideration in tuning the DBMS. Allocations for resources, such as main memory, can be very different depending on whether the workload type is Online Transaction Processing (OLTP) or Decision Support System (DSS). The DBMS also experiences changes in workload type during the normal processing cycle of the DBMS. Database administrators must therefore recognize the significant shift s of workload type that demand reconfiguring the DBMS in order to maintain acceptable levels of performance. Disclosed is a workload type classifier module, used by a DBMS, for recognizing workload types so that the DBMS may then manage or adjust its performance and reconfiguring its resources accordingly. The classifier may be constructed based on the most significant workload characteristics th at differentiate OLTP from DSS; then, the classifier is used for identifying changes in workload types contained in a workload. One aspect, there is provided, for an information retrieval system, a method of identifying a workload type for a given workload, including selecting a sample of the given workload, and predicting identification of the workload type based on a comparison between the selected sample and a set of rules.

公开(公告)号：CA2438357A1

公开(公告)日：2005-02-26

申请号：CA2438357

申请日：2003-08-26

Applicant: IBM CANADA

Inventor： HORMAN RANDALL W ,  WILDING MARK F

IPC: G06F21/00 ,  H04L29/06 ,  H04L12/22 ,  H04L9/32

Abstract: Disclosed is a method of directing a client to establish a secure connection with a server across a public network, the server and the client having exchanged a Server Authentication Public Key, a Client Authentication Public Key, and a Remote Service Unique Identifier (RSUID) during a registration process. The method includes the steps of: transmitting to the server a client information package having the RSUID and a client challenge information package encrypted with the Server Authentication Publi c Key, receiving from the server a server information package having the RSUID and a server challenge information package and a portion of the received client challenge information encrypted with the Client Authentication Public Key, using the Client Authentication Private Key to decrypt and verify the server challenge information package, and, transmitting to the server an encrypted portion of the received client challenge information.