Unisys Corporation

Ronald Leaton Skeoch

Matthew Ky Phuong

Scott Lane Brock

Sumit Kumar Bose

Sherrie Le Houang

Jay Hyon Kang

Systems and methods are disclosed herein to automatically replicate virtual machine image (VM) files on secondary VM computing devices, from a primary VM computing device. The secondary VM computing devices are automatically selected by constantly reviewing the operating parameter values (e.g., cost of resources, power consumption, etc.) of a number of secondary VM computing devices available of storing VM image replicas. The replica of the primary VM image is stored in the secondary VM computing devices in geographically disparate cloud locations. The primary VM image is automatically broken into constituent data blocks stored in an active index, which is compared against a stale index of data blocks. When an update is detected in the primary VM image, the comparison of indices will indicate that there is new data. Only the new data is used to update the secondary VM images, thereby reducing network traffic and latency issues.

Automatic replication of virtual machines

An embodiment of the present invention is a technique for testing core functionality of a clustered system having a plurality of nodes. A cluster population test that includes populating the clustered system with cluster-aware applications is performed. A crash reboot test is performed to stress core operations running within the clustered system; the crash reboot test includes executing a series of crashes or reboots on a subset of the nodes. A move test that includes moving resources to a selected node of the clustered system and verifying that the resources remain on-line at the selected node is performed. A stop test that includes stopping cluster service on a selected subset of nodes of the clustered system and restarting the cluster service on the selected subset of nodes is performed. A Blue Screen Of Death (BSOD) test that includes crashing in BSOD mode one of the nodes of the clustered system and testing reservation release on the crashed node is performed.

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Las Vegas, NV, United States of America

Ronald Leaton Skeoch