Emc IP Holding Company LLC

Other

Emc Corporation

John S Copley

Michael E Specht

Xuedong Jiang

Arieh Don

Erez Ofer

Subin George

Daryl Francis Kinney

Joseph G Murphy

The described technology is generally directed towards adaptively tuning storage systems. According to an embodiment, a system can comprise a processor and computer executable components that can comprise an interval determiner to determine a polling interval based on an estimate of a workload of a shared data store on a data storage array, based on a change activity detected by the system. Further, a host controller can receive transactions from a host application, wherein the transactions perform one or more of updating the local data store, or querying the local data store for results, and a daemon process that, at the polling interval, performs one or more of, polling the data storage array for updates to the local data store based on the shared data store, or updating the shared data store based on the local data store.

Adaptively tuning polling intervals of control hosts in distributed storage systems

Automated port selection for data migration includes an algorithm that selects a set of SAN ports with the following properties: the selected ports have the least port utilization among all possible port selections; the number of independent data paths between the selected ports is no smaller than a user configurable minimum number; and the difference between the aggregate bandwidth of the ports on both arrays is minimized.

Optimal port selection for data migration

Connectivity loss on a storage network may be reliably determined. For one or more host ports connected to a storage system, the frequency with which status communications are received from the host port may be determined. Status communications from a host port then may be monitored to determine if a predefined number of status communications within a predefined period of time have not been received. If so, it may be determined whether a change in storage system permissions concerning use of ports potentially caused the one or more status communications to not be received. If not, it may be determined whether one or more communications associated with a change in configuration of a switch have been received, in which case a predefined amount of time may be allowed to pass to allow the switch change communications to complete; after which status communications from the host port may again be monitored.

Determining causes of connectivity loss on a storage system

An artwork display system is described. The display system includes a backing board having a surface, artwork having a back surface, and an attachment device having a first planar portion and a second planar portion. The first planar portion is affixed to the surface of the backing board and the second planar portion is affixed to the back surface of the artwork. The first planar portion is detachably connected to the second planar portion.

Flexible artwork display system

A method and apparatus for configuring a mass storage system, in which an array of disk storage devices connect to a storage controller and a plurality of host computers also connect to the storage controller, provide the capability, using a convenient graphical user interface at the host computer, for enabling the user at the host computer to determine the status and configuration of the system. The user can also, using the graphical user interface, modify the system status or configuration. Various graphical user interface techniques can be used including 'click and drag' and other user friendly presentations and operations. The system uses either proprietary communications channels between disk drive controller and host computer, or modifies standard protocols in order to enable the necessary communications to occur.

Growing community of inventors

Hopkinton, MA, United States of America

John S Copley