Eric B Lowe

US Patent:

7840839, Nov 23, 2010

Filed:

Sep 9, 2008

Appl. No.:

12/207292

Inventors:

Daniel J. Scales - Mountain View CA, US
Michael Nelson - Alamo CA, US
Andrew Tucker - Menlo Park CA, US
Eric Lowe - Pflugerville TX, US

Assignee:

VMware, Inc. - Palo Alto CA

International Classification:

G06F 11/00

US Classification:

714 13, 707610

Abstract:

A fault-tolerant virtualized computer system comprises a primary host executing a primary virtual machine (VM) and a backup host executing a backup VM. In one embodiment, each VM includes a virtual disk mapped to a shared disk image on physical disk accessible to both hosts. A virtual disk IO request is received by virtualization software executing on the backup host from a backup VM. When the virtual disk IO request is a read request, the virtual disk IO request is mapped to a physical read IO request of a virtual disk image stored on a physical disk, the physical read IO request is issued to the physical disk. However, when the virtual disk IO request is a write request, it is assumed to be completed without mapping the virtual disk IO request or issuing a mapped physical IO request to the physical disk.

US Patent:

7873801, Jan 18, 2011

Filed:

Feb 1, 2007

Appl. No.:

11/670412

Inventors:

Blake A. Jones - Oakland CA, US
George R. Cameron - Santa Cruz CA, US
Eric E. Lowe - Pflugerville TX, US

Assignee:

Oracle America, Inc. - Redwood City CA

International Classification:

G06F 12/00

US Classification:

711158, 711151, 711163, 711170, 711E12001

Abstract:

Managing physical memory for one or more processes with both a minimum and a maximum amount of physical memory. Memory sets are created, each specifying a number of credits. The total number of credits specified by all memory sets are equal to the total number of pages in physical memory. One or more processes are bound to a memory set. All of the processes bound to a memory set are collectively referred to as the workload of the memory set. Each physical page is accounted for to ensure that each workload can utilize at least the number of physical pages equaling the number of credits in its memory set. Additionally, a workload is permitted to use physical pages that are being explicitly shared by workloads of other memory sets. Accordingly, a workload with both a minimum and a maximum amount of physical memory is specified by its memory set.

US Patent:

8127295, Feb 28, 2012

Filed:

Aug 3, 2007

Appl. No.:

11/833907

Inventors:

Blake A. Jones - Oakland CA, US
George R. Cameron - Santa Cruz CA, US
Eric E. Lowe - Pflugerville TX, US

Assignee:

Oracle America, Inc. - Redwood City CA

International Classification:

G06F 9/46

US Classification:

718104, 718105

Abstract:

A device, system, and method are directed towards managing limited resources in a computer system with multiple processing units. Each processing unit has a corresponding bucket. Each thread executing on a processing unit has a corresponding wallet. Buckets and wallets contain credits corresponding to units of the limited resource. When a request for the resource is made, mechanisms of the invention attempt to fulfill the request by looking in a local wallet, a local bucket, or non-local buckets. In a resource shortage situation, credits may be moved to a primary bucket. A load balancing mechanism may distribute credits among buckets, or move credits from wallets to buckets.