RMAN Compression
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Thread: RMAN Compression

  1. #1
    Join Date
    Nov 2000
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    greenwich.ct.us
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    Does anybody know if RMAN can compress data when you backup to disk? For example, if I use RMAN to backup to tape, my tape device will take care of the compression. If I backup to disk, there is no compression used.
    Jeff Hunter
    marist89@yahoo.com
    http://marist89.blogspot.com/
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    "I pledge to stop eating sharks fin soup and will not do so under any circumstances."

  2. #2
    Join Date
    May 2002
    Posts
    37
    RMAN does not compress data when you backup to disk.
    It only does a compression in a way that only non-empty data blocks are copied and the rest is compressed.

    Regards

  3. #3
    Join Date
    Jun 2001
    Location
    Helsinki. Finland
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    3,938
    Jeff, this is from the Oracle documentation. You probably have read it though ...

    "Some media management products can compress data. Real-world experience shows that software compression does not help improve local backup performance. It helps only if the data is transferred over a slow network."
    Oracle Certified Master
    Oracle Certified Professional 6i,8i,9i,10g,11g
    email: ocp_9i@yahoo.com

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