When is it Advanced Compression ? What about HCC?

The below is from the Admin Guide
Note: Hybrid Columnar Compression is dependent on the
underlying storage system. See Oracle Database Licensing Information
for more information.
The below is from the Oracle® Database PL/SQL Packages and Types Reference
Compression Constant Compression Level Description
COMP_FOR_OLTP 2 OLTP compression
COMP_FOR_QUERY_HIGH 4 High compression level for query operations
COMP_FOR_QUERY_LOW 8 Low compression level for query operations
COMP_FOR_ARCHIVE_HIGH 16 High compression level for archive operations
COMP_FOR_ARCHIVE_LOW 32 Low compression level for archive operations
To use Compression Level 4 or higher do we have to have ZFS or Pillar storage ?

Yes, true. They are available also in Exadata.

Similar Messages

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    quote:
    Originally posted by:
    Newsgroup User
    MikeTheVike1 wrote:
    > I love how I can import a PNG file with transparency and
    then give it jpeg
    > compression. it keeps the transparency, and the file
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    Best Regards
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    "Never play Leap-Frog with a Unicorn."
    <urami>
    If you want to mail me - DO NOT LAUGH AT MY ADDRESS
    </urami>
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    Message was edited by:
    Xenofon

    Xenofon Grigoriadis wrote:
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    >
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    Message was edited by:
    mk637Joe

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    DROP TABLE RDT_25K PURGE;
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         SOURCE_FILE VARCHAR2(80),
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         files FILE_LIST;
         geor MDSYS.SDO_GEORASTER;
    BEGIN
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              SELECT GEORASTER INTO geor FROM GEO_25K WHERE ID = i.rownum FOR UPDATE;
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              SELECT georaster INTO geor FROM GEO_25K WHERE id = i.rownum FOR UPDATE;
              sdo_geor.setModelSRID(geor, 81989);
              UPDATE GEO_25K SET georaster = geor WHERE id=i.rownum;
         END LOOP;
         COMMIT;
    END;
    MOSAIC
    set timing on;
    --After the GeoRaster are loaded you may want to set the appropriate SRID if this was not set correctly.
    --SELECT sdo_geor.validateBlockMBR(georaster), id FROM GEO_25K;
    --select id, sdo_geor.getModelSRID(georaster) from GEO_25K;
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    --SELECT t.id, sdo_geor.validategeoraster(t.georaster) isvalid from GEO_25K t order by id;
    --After you have loaded all the georasters, iSMART will pick up each row of the georaster as an individual layer so you need to create a mosaic layer or table
    drop table GEO_MOSAIC_25K;
    drop table RDT_MOSAIC_25K;
    CREATE TABLE GEO_MOSAIC_25K ( ID NUMBER PRIMARY KEY,
    SOURCE_FILE VARCHAR2(80),
    DESCRIPTION VARCHAR2(32),
    GEOMMBR SDO_GEOMETRY,
    GEORASTER SDO_GEORASTER);
    CREATE TABLE RDT_MOSAIC_25K OF SDO_RASTER
    (PRIMARY KEY (RASTERID, PYRAMIDLEVEL, BANDBLOCKNUMBER, ROWBLOCKNUMBER, COLUMNBLOCKNUMBER))
    LOB(RASTERBLOCK) STORE AS (NOCACHE NOLOGGING);
    call sdo_geor_utl.createDMLTrigger('GEO_MOSAIC_25K','GEORASTER');
    DECLARE
    gr sdo_georaster;
    BEGIN
    insert into GEO_MOSAIC_25K (id, georaster)
    values (1, sdo_geor.init('RDT_MOSAIC_25K'))
    returning georaster INTO gr;
    sdo_geor.mosaic('GEO_25K', 'georaster', gr, '');
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    commit;
    END;
    --Then you need to validate the mosaic.
    -- SELECT sdo_geor.validateBlockMBR(georaster), id FROM GEO_MOSAIC_25K;
    SELECT t.id, sdo_geor.validategeoraster(t.georaster) isvalid from GEO_MOSAIC_25K t order by id;
    --The in order to achieve real performance you need to pyramid the mosaic raster. If you don't specify a pyramid level then you oracle will calculate it.
    --If you have set them max resolution to this layer using the Oracle calculated value will produce too many pyramid levels, you need to calculate how many pyramid value you will need
    --See URL for Pyramiding http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28398/geor_intro.htm#CHDDEGJJ
    DECLARE
    gr sdo_georaster;
    BEGIN
    SELECT georaster INTO gr
    FROM GEO_MOSAIC_25K WHERE id = 1 FOR UPDATE;
    -- Generate pyramids.
    sdo_geor.generatePyramid(gr, 'rLevel=5, resampling=NN');
    -- Update the original GeoRaster object.
    UPDATE GEO_MOSAIC_25K SET georaster = gr WHERE id = 1;
    COMMIT;
    END;
    quit
    These work fine until I include 'compression=JPEG-B'
    Cheers,
    David

    Check document:
    1.10.2 DEFLATE Compression of GeoRaster Objects
    DEFLATE compression compresses objects according to the Deflate Compressed Data Format Specification (Network Working Group RFC 1951), and it stores the compressed data in ZLIB format, as described in the ZLIB Compressed Data Format Specification (Network Working Group RFC 1950). The ZLIB header and checksum fields are included in the compressed GeoRaster object.
    Although DEFLATE compression is supported for GeoRaster objects of any size, the total size (columnsPerBlock * rowsPerBlock * bandsPerBlock * cellDepth / 8) of each block of the GeoRaster object must not exceed 1 gigabyte (GB). For large GeoRaster objects, you can call the SDO_GEOR.changeFormatCopy procedure to block the GeoRaster object into blocks smaller than1 GB, and then compress the GeoRaster object; or you can perform the blocking and compression in the same call to the SDO_GEOR.changeFormatCopy procedure.
    Because DEFLATE compression is lossless, compression quality does not apply, and is ignored if it is specified.
    compression
    Specifies the compression type to be applied to the GeoRaster object. Must be one of the following values: JPEG-B, JPEG-F, DEFLATE, or NONE. (You can use NONE to decompress a compressed GeoRaster object.) If compression is not specified, the compression type of the source GeoRaster object is used. For more information about compression and decompression, see Section 1.10. Example: compression=DEFLATE

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