Google Inc.

Brian Patrick McBarron

Michael Bryan Herf

Robert Bailey

Michael DeRosa

Hal Joseph Burch

Brian Neil Makin

A method of operating a cluster of machines includes receiving a request for a disruption, determining a subset of machines of the cluster affected by the requested disruption, and determining a set of jobs having corresponding tasks on the affected machines. The method also includes computing a drain time for a drain that drains the tasks of the jobs from the affected machines, and scheduling on a drain calendar stored in non-transitory memory a drain interval for the drain. The drain interval has a start time and an end time. A maintenance system that includes a scheduler may execute such a method to maintain a cluster of machines.

Operating and maintaining a cluster of machines

In one embodiment, device presence enables persistent access to a set of resources, which may be data or services. Unique device identifiers are assigned to different computers of a user to identify the computers of the user of a network. For example, a device identifier is specific for a user and specific for a messaging system. Some time-consuming and device-specific tasks, such as synchronization of photo albums, transmitting files, sharing a printer, etc., may be interrupted temporarily, such as when the computer is restarted. Using the device identifiers, the messaging system can uniquely identify the devices involved in the tasks and detect the presence of the devices so that, after the interruption, the tasks can be resumed without user intervention.

Methods and apparatuses for identification of device presence

Methods and systems are provided for sharing images over a network. A first user selects an image for sharing and designates an image recipient. Metadata for the first image is transmitted from the first user's terminal to the image recipient's terminal. At least partly in response to receiving the metadata, the image recipient's terminal transmits a request for the first image at a first resolution to the first user's terminal. In response to the request, the first user's terminal transmits the first image at the requested first resolution to the image recipient's terminal.

Methods and systems for image sharing over a network

Methods and systems are provided for sharing images and chat text over a network. A determination is made as to whether a first user of a first terminal has changed focus from a first image to a second image during a chat session conducted with a second user of a second terminal. At least partly in response to determining that the first user of the first terminal has changed focus from the first image to the second image, \a second image identifier is automatically sent to the second terminal. Chat text is transmitted from the first terminal to the second terminal. The second terminal accesses the second image using the second image identifier, and displays the chat text in association with the second image.

Networked chat and media sharing systems and methods

Embodiments of this invention store and distribute from a central system units of information corresponding to files distributively stored in a plurality of remote systems. The remote systems may have intermittent network connection. A separate system, which may also have intermittent network connection, may access the units of information on the central system. The separate system may request that the central system transfer a particular file corresponding to a unit of information. The availability of the file on the remote system may be detected. A process may be initiated to send to the file from the remote system to the separate system, either through the central system or bypassing the central system.

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Export, PA, United States of America

Brian Patrick McBarron