Abstract: Disaster Recovery (DR) and High-Availability (HA) are a critical features required by many information technology systems. DR and HA may be accomplished with a remote secondary site that is kept synchronized with a primary site. To reduce the cost of maintaining a secondary site, the data may be split into two subsets wherein only a first subset of data is kept synchronized at the secondary site using a small bandwidth communication link. The second set of data, which is generally much larger, is periodically backed up at a network accessible back-up location. When a disaster occurs, the secondary site may access the most recent back-up of the second set of data. In a maintenance or limited failure situation, the secondary site can directly access the second data set at the primary site.

Abstract: The invention presents a novel and efficient method of facilitating accurate usage billing. In a multi-user service provider environment, using weighted records of web-server usage to determine each user's bill for services is provided. The invention provides for billing with a minimal amount of overhead on the web host, which will benefit the web host's profit margin. The invention utilizes three pieces of information to compute the amount of usage. The weights that are associated with the functions are determined in order to score the system resource utilization of the respective functions. The weights need to be determined only once during the entire life cycle of the application, and may be based on empirical data or determined through lab tests. The weight can be stored in a static file.

Abstract: Disaster Recovery (DR) and High-Availability (HA) are a critical features required by many information technology systems. DR and HA may be accomplished with a remote secondary site that is kept synchronized with a primary site. To reduce the cost of maintaining a secondary site, the data may be split into two subsets wherein only a first subset of data is kept synchronized at the secondary site using a small bandwidth communication link. The second set of data, which is generally much larger, is periodically backed up at a network accessible back-up location. When a disaster occurs, the secondary site may access the most recent back-up of the second set of data. In a maintenance or limited failure situation, the secondary site can directly access the second data set at the primary site.

Abstract: The invention presents a novel and efficient method of facilitating accurate usage billing. In a multi-user service provider environment, using weighted records of web-server usage to determine each user's bill for services is provided. The invention provides for billing with a minimal amount of overhead on the web host, which will benefit the web host's profit margin. The invention utilizes three pieces of information to compute the amount of usage. The weights that are associated with the functions are determined in order to score the system resource utilization of the respective functions. The weights need to be determined only once during the entire life cycle of the application, and may be based on empirical data or determined through lab tests. The weight can be stored in a static file.

Abstract: The special handling of multiple identical requests for the content during content caching is disclosed. A request for content, such as a web page request received from a client, is received. At least one of two actions is then performed. First, in response to determining that the content is cacheable and that a previous request for the content has already been forwarded to a server responsible for the content, such as a web server, the request is not processed until a response to the previous request is received. Second, in response to determining that the content is non-cacheable, the request is forwarded to the server responsible for the content.

Abstract: The special handling of multiple identical requests for the content during content caching is disclosed. A first for content, such as a web page request received from a client, is received. At least one of two actions is then performed. First, in response to determining that the content is cacheable and that a previous request for the content has already been forwarded to a server responsible for the content, such as a web server, the request is not processed until a response to the previous request is received. Second, in response to determining that the content is non-cacheable, the request is forwarded to the server responsible for the content.

Abstract: An optimizer that reduces execution time of computer code and a system and method that optimizes an execution time for a sequence of instruction blocks in a processor. The optimizer includes: (1) a parsing routine that scans the computer code to identify a conditional branching instruction that leads to execution being diverted from a main execution stream into a branch execution stream in which computer code is executed non-sequentially and (2) a code replication routine that inserts instructions into the branch execution stream to reduce non-sequential code execution.