Abstract: A hypervisor virtual server system, including a plurality of virtual servers, a plurality of virtual disks that are read from and written to by the plurality of virtual servers, a physical disk, an I/O backend coupled with the physical disk and in communication with the plurality of virtual disks, which reads from and writes to the physical disk, a tapping driver in communication with the plurality of virtual servers, which intercepts I/O requests made by any one of said plurality of virtual servers to any one of said plurality of virtual disks, and a virtual data services appliance, in communication with the tapping driver, which receives the intercepted I/O write requests from the tapping driver, and that provides data services based thereon.

Abstract: A method, system, and program product for use in a data replication environment, the data replication environment comprising a plurality of data protection appliances, each data protection appliance of the plurality of data protection appliances comprising a journal, the method comprising creating a virtual consistency group comprising a virtual journal; wherein the virtual consistency group is configured to replicate a production volume, dividing the virtual consistency group into segments; wherein each segment corresponds to a portion of the production volume and a portion of the virtual journal, and assigning each data protection appliance of the plurality of data protection appliances a segment of the virtual consistency group.

Abstract: A hypervisor virtual server system, including a plurality of virtual servers, a plurality of virtual disks that are read from and written to by the plurality of virtual servers, a physical disk, an I/O backend coupled with the physical disk and in communication with the plurality of virtual disks, which reads from and writes to the physical disk, a tapping driver in communication with the plurality of virtual servers, which intercepts I/O requests made by any one of said plurality of virtual servers to any one of said plurality of virtual disks, and a virtual data services appliance, in communication with the tapping driver, which receives the intercepted I/O write requests from the tapping driver, and that provides data services based thereon.

Abstract: A method, system, and program product for use in a data replication environment, the data replication environment comprising a plurality of data protection appliances, each data protection appliance of the plurality of data protection appliances comprising a journal, the method comprising creating a virtual consistency group comprising a virtual journal; wherein the virtual consistency group is configured to replicate a production volume, dividing the virtual consistency group into segments; wherein each segment corresponds to a portion of the production volume and a portion of the virtual journal, and assigning each data protection appliance of the plurality of data protection appliances a segment of the virtual consistency group.

Abstract: A computer software product is provided.

Abstract: Methods and apparatus for a continuous data protection system including replication and journaling, to detect a first problem, react to the first problem, recover from the first problem, determine whether to enter a regulation state due to repetition of the first problem, enter the regulation state, and maintain the regulation state after detecting the first problem again.

Abstract: A computer software product is provided.

Abstract: The input for a test generator is a plurality of test templates, each of which typically aims at covering a specific verification task. Test templates direct the production of distinct transactions, which are the atomic functional building blocks of the design-under-verification. Test templates directed to different hardware functions of the scenario are dynamically interleaved. In this way several transactions are combined together in complex statements in order to achieve a complex test scenario. The transactions are submitted to the test generator, which generates test cases, in which the different hardware functions of the scenario are exercised in combinations. Variation among the test cases is achieved through a large number of random decisions made during the generation process.

Abstract: Improvements in functional verification of a design are achieved by providing a test template that specifies test parameters directed to a function of the design. An exemption mode of operation is associated with a portion of the template, in which constraints and variables associated with the template are revised. The template is an input to a CSP engine, which, in cooperation with a test generator engine, produces test scenarios that lie in an expanded region of the generator's usual operational space. Provision is made for independently enabling and disabling a plurality of exemption modes of operation that are associated with the same or different areas of the template.

Abstract: The input for a test generator is a plurality of test templates, each of which typically aims at covering a specific verification task. Test templates direct the production of distinct transactions, which are the atomic functional building blocks of the design-under-verification. Test templates directed to different hardware functions of the scenario are dynamically interleaved. In this way several transactions are combined together in complex statements in order to achieve a complex test scenario. The transactions are submitted to the test generator, which generates test cases, in which the different hardware functions of the scenario are exercised in combinations. Variation among the test cases is achieved through a large number of random decisions made during the generation process.

Abstract: Improvements in functional verification of a design are achieved by providing a test template that specifies test parameters directed to a function of the design. An exemption mode of operation is associated with a portion of the template, in which constraints and variables associated with the template are revised. The template is an input to a CSP engine, which, in cooperation with a test generator engine, produces test scenarios that lie in an expanded region of the generator's usual operational space. Provision is made for independently enabling and disabling a plurality of exemption modes of operation that are associated with the same or different areas of the template.