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On-the-fly compression in parallel #19

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maxsatula opened this issue Mar 20, 2015 · 2 comments
Open

On-the-fly compression in parallel #19

maxsatula opened this issue Mar 20, 2015 · 2 comments
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enhancement

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@maxsatula
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Download example:

  • Split a source file on pieces (say 100M each)
  • UTL_COMPRESS each piece in parallel (with specified limit of sessions, "degree of parallelism")
  • once a piece is ready, transfer over network and uncompress on-the-fly locally
@maxsatula
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Alternatively (maybe as a separate issue?), TEMP usage can be limited by some command line option (specifying absolute size, % of overall TEMP available, or automatic). This will define how a source file is split by pieces

@maxsatula
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Monitor balance between CPU and network usage

  • if CPU is idle, increase compression level for further pieces
  • if network is idle, add more CPU threads or decrease compression level for further pieces

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@maxsatula