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SUSPENDING AND RESUMING CONTINUOUS QUERIES OVER DATA STREAMS

  • US 20140280325A1
  • Filed: 03/15/2013
  • Published: 09/18/2014
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • processing an input data stream and producing a derived stream therefrom;

    storing the input data stream in an input archive;

    suspending processing of the input data stream; and

    subsequent to suspending processing, resuming processing of the input data stream, wherein resuming comprises;

    storing newly received data in the input data stream in a buffer, as the input data stream is streamed;

    determining a first timestamp of a last processed data item;

    determining a second timestamp from the buffered data stream;

    searching the input archive to find a data item that matches the first timestamp of the last processed data item;

    processing particular data in the input archive having timestamps that are greater than the first timestamp until arriving at data with a third timestamp that is greater than the second timestamp;

    processing the input data stream from the buffer; and

    continuing processing the input data stream as the input stream is streamed;

    wherein the method is performed by one or more computing devices.

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