Synchronous or Asynchronous I/O for NFS mounted filesystems
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Thread: Synchronous or Asynchronous I/O for NFS mounted filesystems

  1. #1
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    Question Synchronous or Asynchronous I/O for NFS mounted filesystems

    Solaris 2.8

    I know regular filesystems use Async I/O on Solaris 2.8. Does anybody know if NFS uses Sync I/O or Async I/O ?
    Jeff Hunter
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  2. #2
    NFS (except Netapp) filesystem cannot be used for database datafiles/redo logs, as they do not garantee the write to the datafiles.
    So, no matter they support aio or not, it won't be used for datafiles/online redo.
    right?
    www.cnoug.org

  3. #3
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    Huh? Who said anything about putting data files or redo log files on NFS mounted filesystems? Maybe I'll start answering questions like that...
    Jeff Hunter
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  4. #4
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    Since this is a DBA forum, I think chao_ping made a reasonable assumption . . .

    OK Jeff, let us into the secret, what will you use the NFS for?
    "The power of instruction is seldom of much efficacy except in those happy dispositions where it is almost superfluous" - Gibbon, quoted by R.P.Feynman

  5. #5
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    Re: Synchronous or Asynchronous I/O for NFS mounted filesystems

    Originally posted by marist89
    Solaris 2.8

    I know regular filesystems use Async I/O on Solaris 2.8. Does anybody know if NFS uses Sync I/O or Async I/O ?
    After Solaris 2.6 you can have Async I/O, yes. But for Solaris 2.6 there is a patch for that in order to be able to use it.
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