MRS. ZHENG LI ZHANG, ACUPUNCTUREIST
Acupuncture at Capitol Ave, San Jose, CA

6810489, Oct 26, 2004

Sep 6, 2000

09/656551

Zheng Zhang - San Jose CA
Manohar Karkal Prabhu - Stanford CA

Hewlett-Packard Development Company, L.P. - Houston TX

G06F 1100

714 6, 711141

A fault-tolerant computer system having an application memory organized as a plurality of cache lines, each cache line being identified by an address in the memory. A FIFO buffer stores a plurality of such cache lines. The system includes at least one CPU for executing instructions stored in the application memory. A checkpoint controller defines a series of repeating checkpoint cycles. The application memory and FIFO buffer are operated under the control of a memory controller. The checkpoint controller also has access to a plurality of registers in the CPU that define the state of that CPU at a point in each checkpoint cycle that is controllable by the controller. When the memory controller receives a cache line from the CPU in response to a write command specifying an address A in the application memory at which the cache line is to be stored, a copy of the cache line as stored in the application memory at A is copied into the FIFO buffer upon receiving the first write command specifying A after the start of the current checkpoint cycle. The cache line received in the write command is then used to overwrite the contents of address A in the application memory. At a predetermined point in each checkpoint cycle, the checkpoint controller causes the CPU to write back to the memory all dirty cache lines; and to store its internal registers defining the state of the CPU in the state memory.

6601070, Jul 29, 2003

Apr 5, 2001

09/826569

Zheng Zhang - San Jose CA
Mallik Mahalingam - Santa Clara CA
Christos Karamanolis - Sunnyvale CA
Daniel Alan Muntz - Cupertinino CA

Hewlett-Packard Development Company, L.P. - Houston TX

G06F 1730

707 8, 707 10, 7071041, 707201

Data coherency and lock services for distributed physical file systems. Client applications are coupled to a virtual file system, which is coupled to one or more physical file systems. A lock agent is coupled to one or more lock servers and to the virtual file system. The virtual file system, in response to a file access request from a client application, submits a data validation request to the lock agent. The lock agent, in turn, submits a lease request to the lock server. When the lock server grants the lease, the lease and a validation code are returned to the lock agent. The validation code indicates whether the data in the buffer cache of the virtual file system are valid. The lock agent then returns the lease to the virtual file system, which then submits the file access request to a selected one of the physical file systems.

6775672, Aug 10, 2004

Dec 19, 2001

10/024940

Mallik Mahalingam - Sunnyvale CA
Zheng Zhang - San Jose CA
Christos Karamanolis - Sunnyvale CA
Daniel A. Muntz - Cupertino CA

Hewlett-Packard Development Company, L.P. - Houston TX

G06F 1730

707 10, 707205

Method and arrangement for updating references to a migrated object in a distributed file system. A migrated object is an object has moved from a source partition server to a target partition server. Each object has an associated parent object and each partition server owns a subset of objects of the file system. A set of forward pointers that reference one or more child objects of the parent object is maintained in each parent object. In the migrated object a set of back pointers is maintained that reference one or more parent objects having forward pointers to the migrated object. To each partition server that owns a parent object of the migrated object, an update request is transmitted. The forward pointers in each parent object are updated in response to the update request.

6775673, Aug 10, 2004

Dec 19, 2001

10/024941

Mallik Mahalingam - Sunnyvale CA
Zheng Zhang - San Jose CA
Christos Karamanolis - Sunnyvale CA
Daniel A. Muntz - Cupertino CA

Hewlett-Packard Development Company, L.P. - Houston TX

G06F 1730

707 10, 707205

Method and system for migrating a logical volumes in a distributed file system having multiple partitions servers. Each partition server owns one or more volumes, and each volume including a subset of logically related objects of the file system. In response to a migration request that requests migration of a selected logical volume from a source partition server to the target partition server, an ownership map is updated to indicate the selected logical volume is owned by the target partition server. At the source partition server, forwarding information is stored to reference the target partition server. When the source partition server receives a request for access to the object, the forwarding information is transmitted to the requester.

7240114, Jul 3, 2007

Sep 25, 2001

09/962512

Christos Karamanolis - Sunnyvale CA, US
Zheng Zhang - San Jose CA, US
Mallik Mahalingam - Santa Clara CA, US
Daniel A. Muntz - Cupertino CA, US

Hewlett-Packard Development Company, L.P. - Houston TX

G06F 15/173, G06F 15/16

709225, 709218, 709221, 709245, 709246, 709249, 370254

Method and system for performing a namespace operation in a distributed file system. The file system is disposed on a plurality of partition servers, and each partition server controls access to a subset of hierarchically-related, shared storage objects. Each namespace operation involves a namespace object and a target object that are part of the shared storage objects. Namespace operations received at each partition server are serialized. In response to an unlink namespace operation, a reference in the namespace object to the target object is removed, and after removal the target object is modified in accordance with the unlink operation. In response to a link operation, the target object is modified consistent with the link operation. After modification of the target object, a reference to the target object is inserted in the namespace object.

7171494, Jan 30, 2007

Jan 31, 2001

09/774841

Christos Karamanolis - Sunnyvale CA, US
Zheng Zhang - San Jose CA, US
Mallik Mahalingam - Santa Clara CA, US

Hewlett-Packard Development Company, L.P. - Houston TX

G06F 13/42

709250, 709203, 709217, 709218, 709219, 710105, 713201

Apparatus and method for extending a standard-based remote file access protocol and maintaining compatibility with the standard protocol stack. Network file system (NFS) remote procedure calls (RPCs) that are submitted by an NFS client application are intercepted in a manner that is transparent to the client operating system. The intercepted NFS-RPCs are sent to a file interface card. The file interface card includes a processor that executes code that implements the standard NFS-RPC protocol, along with extensions to the standard NFS-RPC protocol. Non-NFS RPCs are sent to a conventional network interface card for processing.

7289520, Oct 30, 2007

Nov 20, 2002

10/299907

Zhichen Xu - Sunnyvale CA, US
Zheng Zhang - San Jose CA, US

Hewlett-Packard Development Company, L.P. - Houston TX

H04L 12/28, H04L 5/14, G06F 15/173

370400, 370255, 709238

In a method for creating expressway for overlay routing, an existing peer-to-peer network is organized into a plurality of zones. A neighboring zone to a destination peer is selected. A plurality of residents of the neighboring zone are retrieved. A candidate peer is selected from the plurality of residents based a physical distance value and an estimated distance value.

7953858, May 31, 2011

Jan 17, 2003

10/346067

Zhichen Xu - Sunnyvale CA, US
Zheng Zhang - San Jose CA, US

Hewlett-Packard Development Company, L.P. - Houston TX

G06F 15/16

709227

In a method of mapping peers in a peer-to-peer network to an overlay network, network coordinates are determined for a selected peer. The logical coordinates in the overlay network are determined based on the network coordinates. A zone is determined based on the logical coordinates. The network coordinates, a network address of the selected peer and the zone is stored as an object at a peer owning the zone, where associated information is stored in the peer that has the network coordinate and using the network coordinate as a key.

6985928, Jan 10, 2006

Oct 1, 2002

10/260431

Zheng Zhang - San Jose CA, US
Mallik Mahalingam - Sunnyvale CA, US
Zhichen Xu - Sunnyvale CA, US
Wenting Tang - Sunnyvale CA, US

Hewlett-Packard Development Company, L.P. - Houston TX

G06F 15/167, G06F 9/50

709213, 718104

A peer-to-peer system is divided into a plurality of zones for placing an object. A parent zone having a parent node is identified. The parent zone is divided into the plurality of zones, i. e. , subzones, and one of subzones is selected. A node in the subzone is selected for placing the object.

7266082, Sep 4, 2007

Aug 30, 2002

10/231184

Zhichen Xu - Sunnyvale CA, US
Zheng Zhang - San Jose CA, US

Hewlett-Packard Development Company, L.P. - Houston TX

H04J 1/16

370238, 370252

In a method for expressway routing among peers, a request is received to forward data. The destination is determined from said request. A routing table is searched for an expressway route based on zones to the destination. The data is transmitted across the expressway route to the destination.