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177results about How to "Minimizing transfer" patented technology

Method for maintaining consistency and performing recovery in a replicated data storage system

A recovery process allows a recovering replica in a replicated data storage system to recover from a current replica the changes to the data that it has missed during a failure while, at the same time, the system is processing new requests issued by the source. Sequence numbers, assigned by the source to write requests and stored by each replica in association with the data item that the write request modifies, are used by the recovery process to determine when a replica has missed one or more write requests and requires recovery. During recovery, the recovering replica ignores all requests directly received from the source, and replaces the contents of a data item with the data received from the current replica only if the newly received data item has a higher sequence number than the corresponding sequence number of the data item already stored in the recovering replica. It also updates data items in response to new write requests that are forwarded to it by the current replica. At the same time, the current replica continues to receive requests from the source, performs those requests, and forwards those write requests to the recovering replica. It also scans its data items and sends to the recovering replica those data items and associated sequence numbers that have a sequence number higher than the sequence number of the last consecutive write request sent by the source that the recovering replica received before missing a write request.
Owner:ALCATEL LUCENT SAS

Motor driven sampling apparatus for material collection

InactiveUS20050044971A1Eliminates manual exertionReduce torqueWithdrawing sample devicesMotor driveSource material
An apparatus to excise a sample of material and temporarily store sample has a tubular clamshell casing at an angle to the horizontal, blended to a tubular boss under which is a tubular sample sleeve extending downwards from the boss. Within the casing an electric motor is housed which drives, via gears, the sample sleeve in a rotational manner. The end of the sleeve, distal from the boss, forms a cutting edge circumscribing a circular region. An ejection rod slides reciprocally within the sample sleeve between a stowed position and an expulsion position. When the ejection rod moves from the stowed position to the expulsion position, it will extend past the cutting edge and expel any sample of material contained within the cutting sleeve. A user cuts a sample from a source material using the cutting blade of the apparatus when the ejection rod is in the stowed position. The sample is cut when the cutting blade engages contact against the sample and gentle downward pressure is applied while a finger trigger activates the electric drive to rotate the cutting sleeve. Alternately a user may cut a sample from a source material by engaging contact between the cutting edge of the tubular sleeve and the source material, applying downward pressure against the source material thereby activating the electric drive to rotate the tubular cutting sleeve. Once the source material has been cut it is simultaneously extracted and lodged within the tubular sleeve. The extracted sample remains lodged in the tip of the tubular cutting sleeve until the user actuates the ejection rod through the sleeve to the expulsion position to eject the sample of source material. Return actuation of the eject rod is comprised of a coil spring that biases the rod in the retracted stowed position.
Owner:GE HEALTHCARE BIO SCI CORP
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