mantaGet: Downloads specified Manta object(s), to file(s) or buffer.

In joyent/mantaRSDK: Joyent Manta Storage Service R Software Development Kit

Description

One limitation of the mantaRSDK is that it is not designed to handle large (multi-Gigabyte or larger) objects. Uploads - mantaPut - work from files, but Downloads - mantaGet - fill the R memory space to their completion before being written to a file. To download files larger than your R memory, use the Manta Node.js command line tool mget. The Node.js based Manta command line tools employ streams, so object size is not a limitation.

Usage

mantaGet(mantapath, filename, buffer = FALSE, metadata = FALSE,
  info = TRUE, verbose = FALSE)

Arguments

mantapath	vector of character, optional. Path to a manta object or object name in current working Manta directory for retrieval. Vectorized,
filename	optional. Assumes this is the target filename in the current path. Downloads file to the local path specified by getwd if full path not specified. If filename is absent, downloads to a file with same name as Manta object.
buffer	logical required. When TRUE return a buffer with data. Not supported for vectorized mantapath input.
metadata	logical optional. Set TRUE to retrieve R metadata.
info	logical. Set FALSE to suppress Downloading console messages.
verbose	logical, optional. Passed to RCurl GetURL, Set to TRUE to see background HTTPS REST communication on stderr. Note this is not visible on Windows.

Value

TRUE or FALSE depending on success of GET transfer

See Also

mantaPut

Other mantaGet: mantaCat; mantaLoad.ws; mantaLoad; mantaSave; mantaSource

Examples

## Not run: 
data <- runif(100)
mantaDump("data")
rm(data)
mantaGet("dumpdata.R")
mantaRm("dumpdata.R")
source("dumpdata.R")
ls()

#mantaGet(mantaLs.paths(items = 'o'))
## Downloads the objects in your Manta working directory to your local working R directory with
## the same filenames.

#mantaGet(mantaLs.paths(items = 'o'), metadata = TRUE)
## Downloads and return just the metadata in R format for the Manta working directory contents.

## End(Not run)

joyent/mantaRSDK documentation built on May 19, 2019, 10:43 p.m.