International Business Machines Corporation

Glenn Darrell Batalden

Bruce Oliver Anthony, Jr

Timothy Pressler Clark

Glen R Mitchell

Phillip C Schloss

Neil R Davie

Duane W Baxter

David K Wells

Timothy Pressier Clark

In an embodiment, frames are received in an arrival order. Each of the frames has a target client and a sequence number that represents a relative position of the frame in the arrival order. A transmission order is determined based on bit reversals of the sequence numbers. Then frames are then sent to the respective target client in the transmission order. A frame is sent to the target client from its slot during a respective time period that is associated with the slot. If the slot is empty, no data is sent during the respective time period. In this way, the transmission of frames is spread over the available time.

Determining a transmission order for frames based on bit reversals of sequence numbers

In an embodiment, a request is received from a client that includes a content identifier that identifies content. Content servers are determined that store the content, which is divided into frames. Time reference points and a time period are determined. The time period separates each of the time reference points. Logical groups of the frames are sent from the content servers to the client at the time reference points. The client receives the frames, reorders the frames into a play order, and displays the frames in the play order.

Sending content from multiple content servers to clients at time reference points

Two different data-processing systems are interconnected into a composite system by a shared memory in the address space of each, and by a virtual channel which generates interrupts so that each system can control the other. Each system can execute standalone programs. In addition, one of them acts as an emulated terminal for the other, and also as a system console for the other.

Composite data-processing system using multiple standalone processing

An optical file system in which a command to store data results in a write operation in the next available storage position. A single optical path is used for both reading and writing. By dividing the detector in two equal parts along the direction of relative movement, it is possible to determine whether data has been written at a position which is in advance of the center of the area viewed by the detector. The write operation is conditioned on the output of the first part of the detector. Since the first part of the detector gives advance warning on the status of the oncoming data position, it is possible to switch from reading to writing without the requirement for a wasted revolution or wasted space. By dividing the signal resulting from a change of reflectance sensed during a write operation by a measure of the intensity of the write laser a read signal free of the write modulation is obtained.

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Rochester, MN, United States of America

Glenn Darrell Batalden