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  1. Copy Handler
  2. CH-160

Prototype - async io

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    Details

    • Type: Story
    • Status: Closed
    • Priority: Major
    • Resolution: Won't Do
    • Affects Version/s: None
    • Fix Version/s: 1.40rc2
    • Component/s: engine
    • Labels:
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      Description

      CH uses blocking io. That is the probable cause for the weak copy performance when copying between two relatively slow medias.
      In that scenario copy_time=read_time+write_time+overhead.

      With asynchronous io, it should be possible to reduce the copying time by executing reads and writes in parallel which will result in copy_time=max(read_time, write_time) + read_time_of_first_chunk + write_time_of_last_chunk + overhead.

      The prototype needs to be created to research the possibilities for async io.

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              Assignee:
              admin ixen
              Reporter:
              admin ixen
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