Orion D Letizi

US Patent:

20060271395, Nov 30, 2006

Filed:

May 25, 2006

Appl. No.:

11/441605

Inventors:

Steven Harris - San Francisco CA, US
Timothy Eck - San Mateo CA, US
Orion Letizi - San Francisco CA, US

International Classification:

G06Q 99/00

US Classification:

705001000

Abstract:

Technology for sharing data among multiple virtual machines in a cluster of virtual machines is disclosed. Each virtual machine identifies “managed” objects of an instance of an application running at the virtual machine. Operations performed by an instance of one application which affect the state of managed objects are detected and distributed. The technology includes A computer-implemented method detecting operations performed by a first virtual machine on any local instance of a managed object; creating a transaction including the operation and an object identifier referencing the managed object; and forwarding the transaction to all other virtual machines.

US Patent:

20060271542, Nov 30, 2006

Filed:

May 25, 2006

Appl. No.:

11/442524

Inventors:

Steven Harris - San Francisco CA, US
Orion Letizi - San Francisco CA, US
Timothy Eck - San Mateo CA, US

International Classification:

G06F 17/30

US Classification:

707008000

Abstract:

Technology for sharing data among multiple virtual machines in a cluster of virtual machines is disclosed. Each virtual machine identifies “managed” objects of an instance of an application running at the virtual machine. Operations performed by an instance of one application which affect the state of managed objects are detected and distributed. Each virtual machine in the cluster represents object data using a different locally generated object identifier. The virtual machine detects operations, such as method calls, which are performed by the application and which affect the states of the managed objects. The virtual machine then communicates information identifying the operations to the central manager for use in providing a local representation of the states of the managed objects.

US Patent:

20060271575, Nov 30, 2006

Filed:

May 25, 2006

Appl. No.:

11/442522

Inventors:

Steven Harris - San Francisco CA, US
Orion Letizi - San Francisco CA, US
Timothy Eck - San Mateo CA, US

International Classification:

G06F 7/00

US Classification:

707100000

Abstract:

Technology for sharing data among multiple virtual machines in a cluster of virtual machines is disclosed. Each virtual machine identifies “managed” objects of an instance of an application running at the virtual machine. Operations performed by an instance of one application which affect the state of managed objects are detected and distributed. The technology distributes object state of managed objects by distributing underlying object field data. A cluster of virtual machines each detects changes to objects of an application running at the virtual machine at a field level of granularity and communicates information with other virtual machines in the cluster to replicate the changes to local instances of a managed object at other virtual machines.

US Patent:

20060271930, Nov 30, 2006

Filed:

May 25, 2006

Appl. No.:

11/441676

Inventors:

Orion Letizi - San Francisco CA, US
Timothy Eck - San Mateo CA, US
Saravanan Subbiah - Millbrae CA, US
Steven Harris - San Francisco CA, US

International Classification:

G06F 9/455

US Classification:

718001000

Abstract:

Technology for sharing data among multiple virtual machines in a cluster of virtual machines is disclosed. Each virtual machine identifies “managed” objects of an instance of an application running at the virtual machine. Operations performed by an instance of one application which affect the state of managed objects are detected and distributed. The technology includes creating synthetic transactions at a virtual machine. The transactions share object data among the virtual machines in the cluster. The transactions are considered to be “synthetic” because they are synthesized based on boundaries introduced by the data sharing agent or an implementation of a virtual machine supporting managed objects in accordance with the description herein.

US Patent:

20060271931, Nov 30, 2006

Filed:

May 25, 2006

Appl. No.:

11/441677

Inventors:

Steven Harris - San Francisco CA, US
Timothy Eck - San Mateo CA, US
Saravanan Subbiah - Millbrae CA, US
Orion Letizi - San Francisco CA, US

International Classification:

G06F 9/455

US Classification:

718001000

Abstract:

Technology for sharing data among multiple virtual machines in a cluster of virtual machines is disclosed. Each virtual machine identifies “managed” objects of an instance of an application running at the virtual machine. Operations performed by an instance of one application which affect the state of managed objects are detected and distributed. Technology is included for distributing signaling between threads on different virtual machines. The technique extends existing language semantics, including “synchronized”, “wait” and “notify”, “thread.join” and network call methods to an entire cluster of virtual machines.

US Patent:

20070011667, Jan 11, 2007

Filed:

May 25, 2006

Appl. No.:

11/442523

Inventors:

Saravanan Subbiah - Millbrae CA, US
Timothy Eck - San Mateo CA, US
Steven Harris - San Francisco CA, US
Orion Letizi - San Francisco CA, US

International Classification:

G06F 9/45
G06F 9/44

US Classification:

717148000, 717149000, 717130000

Abstract:

Technology for sharing data among multiple virtual machines in a cluster of virtual machines is disclosed. Each virtual machine identifies “managed” objects of an instance of an application running at the virtual machine. Operations performed by an instance of one application which affect the state of managed objects are detected and distributed. Centralized lock management is provided where a cluster virtual machine requests a lock which affects managed object, and communicates a request to the central manager for the lock. A central manager determines whether the lock is available, and if it is, grants the lock to the virtual machine. The central manager grants the lock to the requesting virtual machine when no other virtual machine currently has the lock.

US Patent:

20070088762, Apr 19, 2007

Filed:

May 25, 2006

Appl. No.:

11/420446

Inventors:

Steven Harris - San Francisco CA, US
Orion Letizi - San Francisco CA, US
Saravanan Subbiah - Millbrae CA, US
Timothy Eck - San Mateo CA, US

International Classification:

G06F 17/30

US Classification:

707201000

Abstract:

Technology for sharing data among multiple virtual machines in a cluster of virtual machines is disclosed. Each virtual machine identifies “managed” objects of an instance of an application running at the virtual machine. The managed objects are objects for which state information is to be replicated at the other virtual machines in the cluster on which other instances of the application are running. Operations performed by an instance of one application which affect the state of managed objects are detected and distributed. A computer-implemented method for maintaining consistent object states at different virtual machines includes receiving managed object state information from a first virtual machine including a first instance of an application; creating a representation of each of the managed objects; and responsive to the received information, communicating state information to at least a second virtual machine on which a second instance of the application is running to replicate the state information at the second virtual machine.