NAME
Paws::Firehose::OrcSerDe
USAGE
This class represents one of two things:
Arguments in a call to a service
Use the attributes of this class as arguments to methods. You shouldn't make instances of this class. Each attribute should be used as a named argument in the calls that expect this type of object.
As an example, if Att1 is expected to be a Paws::Firehose::OrcSerDe object:
$service_obj->Method(Att1 => { BlockSizeBytes => $value, ..., StripeSizeBytes => $value });Results returned from an API call
Use accessors for each attribute. If Att1 is expected to be an Paws::Firehose::OrcSerDe object:
$result = $service_obj->Method(...);
$result->Att1->BlockSizeBytesDESCRIPTION
A serializer to use for converting data to the ORC format before storing it in Amazon S3. For more information, see Apache ORC (https://orc.apache.org/docs/).
ATTRIBUTES
BlockSizeBytes => Int
The Hadoop Distributed File System (HDFS) block size. This is useful if you intend to copy the data from Amazon S3 to HDFS before querying. The default is 256 MiB and the minimum is 64 MiB. Kinesis Data Firehose uses this value for padding calculations.
BloomFilterColumns => ArrayRef[Str|Undef]
The column names for which you want Kinesis Data Firehose to create bloom filters. The default is null.
BloomFilterFalsePositiveProbability => Num
The Bloom filter false positive probability (FPP). The lower the FPP, the bigger the Bloom filter. The default value is 0.05, the minimum is 0, and the maximum is 1.
Compression => Str
The compression code to use over data blocks. The default is SNAPPY.
DictionaryKeyThreshold => Num
Represents the fraction of the total number of non-null rows. To turn off dictionary encoding, set this fraction to a number that is less than the number of distinct keys in a dictionary. To always use dictionary encoding, set this threshold to 1.
EnablePadding => Bool
Set this to true to indicate that you want stripes to be padded to the HDFS block boundaries. This is useful if you intend to copy the data from Amazon S3 to HDFS before querying. The default is false.
FormatVersion => Str
The version of the file to write. The possible values are V0_11 and V0_12. The default is V0_12.
PaddingTolerance => Num
A number between 0 and 1 that defines the tolerance for block padding as a decimal fraction of stripe size. The default value is 0.05, which means 5 percent of stripe size.
For the default values of 64 MiB ORC stripes and 256 MiB HDFS blocks, the default block padding tolerance of 5 percent reserves a maximum of 3.2 MiB for padding within the 256 MiB block. In such a case, if the available size within the block is more than 3.2 MiB, a new, smaller stripe is inserted to fit within that space. This ensures that no stripe crosses block boundaries and causes remote reads within a node-local task.
Kinesis Data Firehose ignores this parameter when OrcSerDe$EnablePadding is false.
RowIndexStride => Int
The number of rows between index entries. The default is 10,000 and the minimum is 1,000.
StripeSizeBytes => Int
The number of bytes in each stripe. The default is 64 MiB and the minimum is 8 MiB.
SEE ALSO
This class forms part of Paws, describing an object used in Paws::Firehose
BUGS and CONTRIBUTIONS
The source code is located here: https://github.com/pplu/aws-sdk-perl
Please report bugs to: https://github.com/pplu/aws-sdk-perl/issues