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  1. Lucene - Core
  2. LUCENE-2615

DirectIOLinuxDirectory hardwires buffer size and creates files with invalid permissions

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 3.1, 4.0-ALPHA
    • modules/other
    • None
    • New

    Description

      TestDemo fails if I use the DirectIOLinuxDirectory (using Robert's new -Dtests.directory=XXX), because when it O_CREATs a file, it fails to specify the mode, so [depending on C stack!] you can get permission denied.

      Also, we currently hardwire the buffer size to 1 MB (Mark found this)... I plan to add a "forcedBufferSize" to the DirectIOLinuxDir's ctor, to optionally override lucene's default buffer sizes (which are way too small for direct IO to get barely OK performance). If you pass 0 for this then you get Lucene's default buffer sizes...

      Attachments

        1. LUCENE-2615.patch
          4 kB
          Michael McCandless

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            mikemccand Michael McCandless
            mikemccand Michael McCandless
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            Dates

              Created:
              Updated:
              Resolved: