water.fvec
Class NFSFileVec

java.lang.Object
  water.Iced
      water.fvec.Vec
          water.fvec.ByteVec
              water.fvec.NFSFileVec

All Implemented Interfaces:

java.lang.Cloneable, Freezable

public class NFSFileVec
extends ByteVec

Nested Class Summary

Nested classes/interfaces inherited from class water.fvec.Vec

Vec.CollectDomain, Vec.VectorGroup

Field Summary

Fields inherited from class water.fvec.Vec

_domain, _key, LOG_CHK

Method Summary

long	chunk2StartElem(int cidx) Convert a chunk-index into a starting row #.
Value	chunkIdx(int cidx) Get a Chunk's Value by index.
static int	chunkIdx(Key ckey)
static long	chunkOffset(Key ckey)
long	length() Number of elements in the vector.
static Key	make(java.io.File f)
static Key	make(java.io.File f, Futures fs)
int	nChunks() Number of chunks.
boolean	writable() Default read/write behavior for Vecs.

Methods inherited from class water.fvec.ByteVec

elem2BV, openStream

Methods inherited from class water.fvec.Vec

adaptTo, asEnum, at, at8, byteSize, chunk, chunkKey, chunkLen, defaultLevels, domain, domain, group, isEnum, isInt, isNA, makeCon, makeCon, makeTransf, makeTransf, makeZero, max, mean, min, naCnt, postWrite, readable, remove, rollupStats, rollupStats, rollupStats, set, set, set, setNA, sigma, toEnum, toString

Methods inherited from class water.Iced

clone, frozenType, init, newInstance, read, toDocField, write, writeJSON, writeJSONFields

Methods inherited from class java.lang.Object

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

Method Detail

make

public static Key make(java.io.File f)

make

public static Key make(java.io.File f,
                       Futures fs)

length

public long length()

Description copied from class: Vec

Number of elements in the vector. Overridden by subclasses that compute length in an alternative way, such as file-backed Vecs.

Overrides:

length in class Vec

nChunks

public int nChunks()

Description copied from class: Vec

Number of chunks. Overridden by subclasses that compute chunks in an alternative way, such as file-backed Vecs.

Overrides:

nChunks in class Vec

writable

public boolean writable()

Description copied from class: Vec

Default read/write behavior for Vecs. AppendableVecs are write-only.

Overrides:

writable in class Vec

chunk2StartElem

public long chunk2StartElem(int cidx)

Description copied from class: Vec

Convert a chunk-index into a starting row #. For constant-sized chunks this is a little shift-and-add math. For variable-sized chunks this is a table lookup.

Overrides:

chunk2StartElem in class Vec

chunkOffset

public static long chunkOffset(Key ckey)

chunkIdx

public static int chunkIdx(Key ckey)

chunkIdx

public Value chunkIdx(int cidx)

Description copied from class: Vec

Get a Chunk's Value by index. Basically the index-to-key map, plus the DKV.get. Warning: this pulls the data locally; using this call on every Chunk index on the same node will probably trigger an OOM!

Overrides:

chunkIdx in class Vec