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• Default Value: 0.5
• Added In: Hive 0.11.0 with HIVE-4248

Maximum fraction of heap that can be used by ORC file writers.

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• Default Value: (empty)
• Added In: Hive 0.12.0 with HIVE-4123; default changed from 0.11 to null with HIVE-5091 (also in Hive 0.12.0)

Define the version of the file to write. Possible values are 0.11 and 0.12. If this parameter is not defined, ORC will use the run length encoding (RLE) introduced in Hive 0.12. Any value other than 0.11 results in the 0.12 encoding.

Additional values may be introduced in the future (see HIVE-6002).

hive.exec.orc.default.stripe.size

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Define the default ORC stripe size, in bytes.

hive.exec.orc.default.block.size

• Default Value: 256*1024*1024 (268,435,456)
• Added In: Hive 0.14.00 with HIVE-7231

Define the default file system block size for ORC files.

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• Default Value: 0.8
• Added In: Hive 0.12.00 with HIVE-4324

If the number of keys in a dictionary is greater than this fraction of the total number of non-null rows, turn off dictionary encoding.  Use 1 to always use dictionary encoding.

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• Default Value: 10000
• Added In: Hive 0.13.00 with HIVE-5728

Define the default ORC index stride.stride in number of rows. (Stride is the number of rows an index entry represents.)

hive.exec.orc.default.buffer.size

• Default Value: 256*1024 (262,144)
• Added In: Hive 0.13.00 with HIVE-5728

Define the default ORC buffer size, in bytes.

hive.exec.orc.default.block.padding

• Default Value: true
• Added In: Hive 0.13.00 with HIVE-5728

Define the default block padding. Block padding was added in Hive 0.12.0 (HIVE-5091, "ORC files should have an option to pad stripes to the HDFS block boundaries").

hive.exec.orc.block.padding.tolerance

• Default Value: 0.05
• Added In: Hive 0.14.00 with HIVE-7231

Define the tolerance for block padding as a decimal fraction of stripe size (for example, the default value 0.05 is 5% of the stripe size). For the defaults of 64Mb ORC stripe and 256Mb HDFS blocks, a maximum of 3.2Mb will be reserved for padding within the 256Mb block with the default hive.exec.orc.block.padding.tolerance. In that case, if the available size within the block is more than 3.2Mb, a new smaller stripe will be inserted to fit within that space. This will make sure that no stripe written will cross block boundaries and cause remote reads within a node local task.

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• Default Value: ZLIB
• Added In: Hive 0.13.00 with HIVE-5728

Define the default compression codec for ORC file.

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• Default Value: SPEED
• Added In: Hive 0.14.00 with HIVE-7219

Define the encoding strategy to use while writing data. Changing this will only affect the light weight encoding for integers. This flag will not change the compression level of higher level compression codec (like ZLIB). Possible options are SPEED and COMPRESSION.

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