Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A technique for managing a data network includes monitoring data transfer rates and data transfer thresholds for data transferred between storage and an application. Feedback on the suitability of the data transfer rate is collected from the application. A data transfer threshold for the application is changed based on the monitored data transfer rate and the collected feedback.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A technique for managing a data network includes monitoring data transfer rates and data transfer thresholds for data transferred between storage and an application. Feedback on the suitability of the data transfer rate is collected from the application. A data transfer threshold for the application is changed based on the monitored data transfer rate and the collected feedback.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: Method to display the status of tags applied to objects in a cloud computing environment, by comparing an attribute of an object to a criterion of a tag applied to the object, wherein the object is part of the cloud computing environment, and outputting for display a graphical representation of the tag, wherein the graphical representation comprises a text of the tag and an indication of a result of the comparison.

Abstract: A technique for failure monitoring and recovery of a first application executing on a first virtual machine includes storing machine state information during execution of the first virtual machine at predetermined checkpoints. An error message that includes an application error state at a failure point of the first application is received, by a hypervisor, from the first application. The first virtual machine is stopped in response to the error message. The hypervisor creates a second virtual machine and a second application from the stored machine state information that are copies of the first virtual machine and the first application. The second virtual machine and the second application are configured to execute from a checkpoint preceding the failure point. In response to receipt of a failure interrupt by the second application, one or more recovery processes are initiated in an attempt to avert the failure point.

Abstract: Systems, methods, and computer program products to tag objects in a cloud computing environment, by tagging an object with a first tag, of a plurality of tags, wherein each of the plurality of tags specifies a respective criterion for objects tagged by each tag, and upon determining that the object not satisfy the criterion of the first tag, performing an action associated with the first tag to modify the object to meet the criterion of the first tag.

Abstract: Methods to tag objects in a cloud computing environment, by tagging an object with a first tag, of a plurality of tags, wherein each of the plurality of tags specifies a respective criterion for objects tagged by each tag, and upon determining that the object not satisfy the criterion of the first tag, performing an action associated with the first tag to modify the object to meet the criterion of the first tag.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.

Abstract: A computer system comprises a processor unit arranged to run a hypervisor running one or more virtual machines; a cache connected to the processor unit and comprising a plurality of cache rows, each cache row comprising a memory address, a cache line and an image modification flag; and a memory connected to the cache and arranged to store an image of at least one virtual machine. The processor unit is arranged to define a log in the memory and the cache further comprises a cache controller arranged to set the image modification flag for a cache line modified by a virtual machine being backed up, but not for a cache line modified by the hypervisor operating in privilege mode; periodically check the image modification flags; and write only the memory address of the flagged cache rows in the defined log.