org.apache.hadoop.fs

Class Options.OpenFileOptions

java.lang.Object

org.apache.hadoop.fs.Options.OpenFileOptions

Enclosing class:

Options

@InterfaceAudience.Public
 @InterfaceStability.Evolving
public static final class Options.OpenFileOptions
extends Object

The standard openFile() options.

Field Summary

Fields

Modifier and Type	Field and Description
static String	FS_OPTION_OPENFILE Prefix for all openFile options: "fs.option.openfile.".
static String	FS_OPTION_OPENFILE_BUFFER_SIZE OpenFile option for buffer size: "fs.option.openfile.buffer.size".
static String	FS_OPTION_OPENFILE_FOOTER_CACHE OpenFile footer cache flag: "fs.option.openfile.footer.cache".
static String	FS_OPTION_OPENFILE_LENGTH OpenFile option for file length: "fs.option.openfile.length".
static Set<String>	FS_OPTION_OPENFILE_READ_POLICIES All the current read policies as a set.
static String	FS_OPTION_OPENFILE_READ_POLICY OpenFile option for read policies: "fs.option.openfile.read.policy".
static String	FS_OPTION_OPENFILE_READ_POLICY_ADAPTIVE Read policy for adaptive IO: "adaptive".
static String	FS_OPTION_OPENFILE_READ_POLICY_AVRO We are an avro file: "avro".
static String	FS_OPTION_OPENFILE_READ_POLICY_COLUMNAR This is a columnar file format.
static String	FS_OPTION_OPENFILE_READ_POLICY_CSV This is a CSV file of plain or UTF-8 text to be read sequentially.
static String	FS_OPTION_OPENFILE_READ_POLICY_DEFAULT Read policy "default" -whatever the implementation does by default.
static String	FS_OPTION_OPENFILE_READ_POLICY_HBASE This is a table file for Apache HBase.
static String	FS_OPTION_OPENFILE_READ_POLICY_JSON This is a JSON file of UTF-8 text, including a JSON line file where each line is a JSON entity.
static String	FS_OPTION_OPENFILE_READ_POLICY_ORC This is an ORC file.
static String	FS_OPTION_OPENFILE_READ_POLICY_PARQUET This is a parquet file with a v1/v3 footer: "parquet".
static String	FS_OPTION_OPENFILE_READ_POLICY_RANDOM Read policy for random IO: "random".
static String	FS_OPTION_OPENFILE_READ_POLICY_SEQUENTIAL Read policy for sequential IO: "sequential".
static String	FS_OPTION_OPENFILE_READ_POLICY_VECTOR Vectored IO API to be used: "vector".
static String	FS_OPTION_OPENFILE_READ_POLICY_WHOLE_FILE Whole file to be read, end-to-end: "whole-file".
static String	FS_OPTION_OPENFILE_SPLIT_END OpenFile option for split end: "fs.option.openfile.split.end".
static String	FS_OPTION_OPENFILE_SPLIT_START OpenFile option for split start: "fs.option.openfile.split.start".
static Set<String>	FS_OPTION_OPENFILE_STANDARD_OPTIONS Set of standard options which openFile implementations MUST recognize, even if they ignore the actual values.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

FS_OPTION_OPENFILE

public static final String FS_OPTION_OPENFILE

Prefix for all openFile options: "fs.option.openfile.".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_LENGTH

public static final String FS_OPTION_OPENFILE_LENGTH

OpenFile option for file length: "fs.option.openfile.length".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_SPLIT_START

public static final String FS_OPTION_OPENFILE_SPLIT_START

OpenFile option for split start: "fs.option.openfile.split.start".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_SPLIT_END

public static final String FS_OPTION_OPENFILE_SPLIT_END

OpenFile option for split end: "fs.option.openfile.split.end".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_BUFFER_SIZE

public static final String FS_OPTION_OPENFILE_BUFFER_SIZE

OpenFile option for buffer size: "fs.option.openfile.buffer.size".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_FOOTER_CACHE

public static final String FS_OPTION_OPENFILE_FOOTER_CACHE

OpenFile footer cache flag: "fs.option.openfile.footer.cache".

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Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY

public static final String FS_OPTION_OPENFILE_READ_POLICY

OpenFile option for read policies: "fs.option.openfile.read.policy".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_STANDARD_OPTIONS

public static final Set<String> FS_OPTION_OPENFILE_STANDARD_OPTIONS

Set of standard options which openFile implementations MUST recognize, even if they ignore the actual values.

FS_OPTION_OPENFILE_READ_POLICY_ADAPTIVE

public static final String FS_OPTION_OPENFILE_READ_POLICY_ADAPTIVE

Read policy for adaptive IO: "adaptive".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_AVRO

public static final String FS_OPTION_OPENFILE_READ_POLICY_AVRO

We are an avro file: "avro".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_COLUMNAR

public static final String FS_OPTION_OPENFILE_READ_POLICY_COLUMNAR

This is a columnar file format. Do whatever is needed to optimize for it: "columnar".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_CSV

public static final String FS_OPTION_OPENFILE_READ_POLICY_CSV

This is a CSV file of plain or UTF-8 text to be read sequentially. Do whatever is needed to optimize for it: "csv".

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Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_DEFAULT

public static final String FS_OPTION_OPENFILE_READ_POLICY_DEFAULT

Read policy "default" -whatever the implementation does by default.

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_HBASE

public static final String FS_OPTION_OPENFILE_READ_POLICY_HBASE

This is a table file for Apache HBase. Do whatever is needed to optimize for it: "hbase".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_JSON

public static final String FS_OPTION_OPENFILE_READ_POLICY_JSON

This is a JSON file of UTF-8 text, including a JSON line file where each line is a JSON entity. Do whatever is needed to optimize for it: "json".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_ORC

public static final String FS_OPTION_OPENFILE_READ_POLICY_ORC

This is an ORC file. Do whatever is needed to optimize for it: "orc".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_PARQUET

public static final String FS_OPTION_OPENFILE_READ_POLICY_PARQUET

This is a parquet file with a v1/v3 footer: "parquet". Do whatever is needed to optimize for it, such as footer prefetch and cache,

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_RANDOM

public static final String FS_OPTION_OPENFILE_READ_POLICY_RANDOM

Read policy for random IO: "random".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_SEQUENTIAL

public static final String FS_OPTION_OPENFILE_READ_POLICY_SEQUENTIAL

Read policy for sequential IO: "sequential".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_VECTOR

public static final String FS_OPTION_OPENFILE_READ_POLICY_VECTOR

Vectored IO API to be used: "vector".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICY_WHOLE_FILE

public static final String FS_OPTION_OPENFILE_READ_POLICY_WHOLE_FILE

Whole file to be read, end-to-end: "whole-file".

See Also:

Constant Field Values

FS_OPTION_OPENFILE_READ_POLICIES

public static final Set<String> FS_OPTION_OPENFILE_READ_POLICIES

All the current read policies as a set.