Charles E Bailey

US Patent:

8479046, Jul 2, 2013

Filed:

Jun 28, 2010

Appl. No.:

12/824966

Inventors:

Charles Christopher Bailey - Cary NC, US
Miles Aram de Forest - Bahama NC, US
David Haase - Fuquay Varina NC, US
Saurabh M. Pathak - Jersey City NJ, US
Chetan Rameshchandra Vaidya - Morrisville NC, US
Paul T. McGrath - Raleigh NC, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 11/00

US Classification:

714 25, 714 48, 714 2

Abstract:

Systems, methods, and computer readable media for tracking storage pool reservations are disclosed. According to one aspect, the subject matter described herein includes a system for tracking storage pool reservations. The system includes a storage entity having data storage space for storing data, the data storage space being divided into a plurality of slices. The system also includes one or more portions of non-volatile memory, different from the data storage space, for storing slice reservation statistics and information about requests that affect slice reservation statistics, wherein storing information in the portion of non-volatile memory is an atomic operation. The system further includes a control module for receiving a request that affect slice reservation statistics, storing information about the request in the portion of non-volatile memory, performing the request, and updating the slice reservation statistics and clearing the information about the request in the portion of non-volatile memory.

US Patent:

8645654, Feb 4, 2014

Filed:

Jun 29, 2011

Appl. No.:

13/172517

Inventors:

Charles Christopher Bailey - Cary NC, US
Dayanand Suldhal - Durham NC, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 12/00

US Classification:

711165, 711170, 711E12002

Abstract:

A method is used in selecting physical storage in data storage systems. A request for allocation of a portion of storage area of a data storage system is received from a requesting entity. The data storage system is comprised of a set of storage entities and a set of data buses for transferring data to and from the set of storage entities. The set of storage entities are organized into a set of logical units. Each logical unit of the set of logical units is subdivided into a set of slices. A slice is selected from a logical unit of the set of logical units for allocation for use by the requesting entity in response to receiving the request for allocation. The selection is based on an optimum value indicating physical location of the logical unit within the set of storage entities during access to data to be stored in the data storage system.

US Patent:

20230010240, Jan 12, 2023

Filed:

Jul 8, 2021

Appl. No.:

17/370195

Inventors:

- Hopkinton MA, US
Sathya Krishna Murthy - Morrisville NC, US
Charles Christopher Bailey - Cary NC, US

International Classification:

G06F 3/06

Abstract:

Techniques for managing sequencing requests for storage node operations based on types of operations being sequenced. The techniques manage sequencing requests for different types of operations, such as backup and recovery operations, replication operations, migration operations, and so on, in a manner that avoids overwhelming storage node capacity. The techniques include receiving a sequencing request for an operation of a specified operation type at a request manager of a storage node and determining whether a capacity of the storage node is available for running the operation by a capacity manager for the specified operation type, in which the capacity manager is provided by a storage client and implemented on the storage node separate from the request manager. In this way, throttling, limiting, and/or prioritization requirements of the operation of the specified operation type can be defined by the storage client in a manner agnostic to the request manager.

US Patent:

20210342362, Nov 4, 2021

Filed:

Apr 29, 2020

Appl. No.:

16/861747

Inventors:

- Hopkinton MA, US
Charles C. Bailey - Cary NC, US
Girish Sheelvant - Hopkinton MA, US
Nagapraveen Veeravenkata Seela - Cary NC, US

International Classification:

G06F 16/27
G06F 11/14

Abstract:

A method, computer program product, and computer system for triggering, by a computing device, a synchronization activity on a storage object. A request may be executed for a copy operation resulting from the synchronization activity to copy the storage object from a source to a destination when a current number of concurrent copy operations is below a maximum number of copy operations. The request for the copy operation resulting from the synchronization activity to copy the storage object from the source to the destination may be placed in a queue when the current number of concurrent copy operations is at least at the maximum number of copy operations. One or more attributes of the request in the queue may be identified. The request for the copy operation may be executed according to a replication policy based upon, at least in part, the one or more attributes of the request in the queue.