Emc IP Holding Company LLC

Emc Corporation

Benjamin Kelley

Brian R Tetreault

Tyler M Graves

Daniel K O'Reilly

Gregory William Lazar

Michael Lee Burriss

Millard C Taylor, Iii

Mahadevan Vasudevan

Jochen F De Smet

Weixing Wang

Described are techniques for determining utilization. A plurality of indicator values for a plurality of utilization indicators for each system included in a set of one or more systems are received. Each of the plurality of indicator values represents a score for a different one of the plurality of utilization indicators. A system utilization score for each of the one or more systems is determined in accordance with the plurality of indicator values for each system. An overall utilization score of the set of systems is determined in accordance with the system utilization score for each of the one or more systems.

Calculation of system utilization

An installation image of a virtual storage appliance (VSA) is protected by initiating VSA installation from an archive image establishing a pre-installation operating state. The archive image includes an installation image with a lockbox storing a first key for accessing the installation image. The lockbox is encrypted using a second key derived from a stable system value (SSV), such as data for device partitioning, obtainable from an execution environment in the pre-installation operating state. During installation, the SSV is obtained and used in decrypting the lockbox to retrieve the first key and use the installation image to install the VSA. The VSA is installed in a manner establishing a post-installation operating in which the SSV is no longer obtainable from the execution environment, e.g., due to changing the device partition information. An SSV obtained from the partition information post-installation does not yield the key for decrypting the lockbox, protecting the installed image.

Secured virtual storage appliance installation image

Improved clustered storage systems make use of a software toggle switch stored in a shared persistent configuration database, which allows a peer node to be rebooted into a FIPS 140 mode defined by the switch and then to take over as master while the original master node reboots into the new FIPS 140 mode as defined by the switch. Advantageously, system availability is maintained as the nodes are rebooted sequentially while a master is always available. The persistent switch allows for synchronization, while also allowing persistence of state even in the event of a system crash.

Techniques for persistently toggling a FIPS-140 cryptographic mode of a clustered storage system

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Benjamin Kelley