William Z Zahavi

6775826, Aug 10, 2004

Jun 26, 2002

10/180849

William Zahavi - Westborough MA
Kenneth R. Coguen - Berlin MA
Paul F. Hale - Hudson MA
Andrew M. Shooman - Sharon MA
Yeshayahu Hass - Hon-Hasharon, IL

EMC Corporation - Hopkinton MA

G06F 1130

717128, 710 18, 714 45, 711162

This invention is a system and method for replaying workload data that may be accessed in a data storage environment and then replayed for testing or other reasons. The invention has the capability to extract a trace of all I/Os to a data storage system for an extended period of time and then replay these I/Os back to that or another system. Variables may also be manipulated though the play back system to increase testing flexibility at a lower cost than actually introducing new physical variables.

6813731, Nov 2, 2004

Feb 26, 2001

09/794696

William Zahavi - Westborough MA
Andrew M. Shooman - Sharon MA
Yeshayahu Hass - Hod-Hasharon, IL

EMC Corporation - Hopkinton MA

G06F 1100

714 45, 717128

A system provides mechanisms and techniques to retrieve trace data from a trace buffer residing in a data storage system. The software program operating on a processor within the data storage system operates in trace mode to produce trace data in the trace buffer upon occurrence of trace events. An event trace routine operates in response to a system call to access the trace buffer and return either a current value of a trace buffer pointer or the current trace buffer pointer as well as trace data read from the trace buffer beginning at a location and in an amount as specified in the system call to the event trace routine. The trace capture process can operate either within the data storage system or preferably on a remote host computer system to access trace data in the trace buffer in the data storage system by using the event trace routine. The trace capture process can periodically query the event trace routine with a frequency determined by an adaptive timing algorithm in order to detect the addition of trace data to the trace buffer. Upon detecting such a condition, the trace capture process can use the event trace routine to retrieve the trace data from the trace buffer.

6820035, Nov 16, 2004

Jun 26, 2002

10/180703

William Zahavi - Westborough MA

EMC Corporation - Hopkinton MA

G06F 1200

702182

This invention is a system and method for performing a data management function using correlated data obtained from analyzing work performed on data stored in a data storage system.

6886020, Apr 26, 2005

Aug 17, 2000

09/641227

William Zahavi - Westborough MA, US
Lee W. Sapiro - Hudson MA, US
Saymai Thammavong - Marlborough MA, US
Ron Arnan - Brookline MA, US

EMC Corporation - Hopkinton MA

G06F017/30

707204, 711161

A data management and archive method and apparatus, such as for implementation in an automated system to monitor and manage status, performance and configuration data for a plurality of networked storage components. Analysis and cross-correlation of data related to the plurality of storage components can be done individually, collectively and/or comparatively. A collection manager component of a workload analyzer is implemented to start and stop data collection in the context of a system comprising at least one storage component (or at least two networked storage components). The collection manager includes a command and control module that coordinates requests of data from at least one collection agent configured on at least one host connected to the storage component(s).

7024517, Apr 4, 2006

Sep 27, 2001

09/965431

William Zahavi - Westborough MA, US

EMC Corporation - Hopkinton MA

G06F 12/00

711114, 711170, 711113

This invention is a system and method for configuring data storage in accordance with workload requirements. The method of this invention allows management and planning for data storage system requirements based on user or administrator defined requirements. It also allows such a user or administrator to iteratively adjust and balance tolerances for performance thresholds or capacity parameters against each other. The invention provides an easy to use user interface that simplifies the configuration and planning task and eases restrictions on the amount of experience and knowledge that a user of the tool needs to achieve a satisfactory data storage solution.

7035970, Apr 25, 2006

Jun 26, 2002

10/180716

William Zahavi - Westborough MA, US

EMC Corporation - Hopkinton MA

G06F 12/00

711114, 711170, 711113

This invention is a system and method for configuring or modeling a data storage environment in accordance with workload and performance characteristics and by using correlation information regarding logical devices storing data on a data storage system in the environment.

7065624, Jun 20, 2006

Sep 24, 2002

10/254228

William Zahavi - Westborough MA, US

EMC Corporation - Hopkinton MA

G06F 12/02

711170, 711171, 711172, 711173, 718104

This invention is a system and method for configuring or modeling a data storage environment in accordance with workload and performance characteristics and by using selected correlation characteristics of logical devices storing data on a data storage system in the environment.

7082441, Jul 25, 2006

Aug 17, 2000

09/641224

William Zahavi - Westborough MA, US
Lee W. Sapiro - Hudson MA, US
Saymai Thammavong - Marlborough MA, US
Ron Arnan - Brookline MA, US

EMC Corporation - Hopkinton MA

G06F 17/30

707200, 707204, 711162

A method for storage and manipulation of storage system metrics incorporates a self-describing format wherein each data file includes a header block that contains the description and order of the periodic data. The header block is followed by a data block in which the data items are presented in the order that they appear in the data description block for that category. Two types of data are managed, including Base Metrics and Derived Metrics. Base Metrics are metrics that appear in the data file sent by an agent. Derived Metrics are computed based on a set of functions that derive new metrics from the base metrics as well as from previously defined derived metrics. A subset of the data block or file describes the configuration of the storage system at the time that the data file was created. Thus the data file contains a header section that in addition to describing the metrics also describes the configuration. A performance view component a user interface that facilitates access to the archives, and data manipulation effecting enhanced performance analysis, workload characterization and capacity planning.