dfs.empty {rmr2}R Documentation

Backend-independent file manipulation

Description

Check if an item is empty or return its size. Move an item or remove(recursively). Here item is a valid path or big.data.object

Usage

dfs.empty(fname)
dfs.exists(fname)
dfs.size(fname)
dfs.mv(from, to)
dfs.rmr(fname)
dfs.ls(fname)

Arguments

fname

A valid path or big.data.object

from, to

A valid path

Details

The size of a directory, for the sake of this commands, is the size of the files contained therein with the exception of hidden files starting with "." and "_". This is not well documented in Hadoop but there is a private call that implements this pattern.

Value

For dfs.size a number of bytes; for dfs.empty and dfs.exists, a logical; for dfs.ls a data.frame

Examples

dfs.empty(mapreduce(to.dfs(1:10)))
dfs.size(mapreduce(to.dfs(1:10)))

[Package rmr2 version 3.3.1 Index]