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Create the aws argument of tar_resources() to specify optional settings to AWS for tar_target(..., repository = "aws"). See the format argument of tar_target() for details.

Usage

tar_resources_aws(
  bucket,
  prefix = targets::path_objects_dir_cloud(),
  region = NULL,
  part_size = 5 * (2^20),
  endpoint = NULL
)

Arguments

bucket

Character of length 1, name of an existing bucket to upload and download the return values of the affected targets during the pipeline.

prefix

Character of length 1, "directory path" in the bucket where the target return values are stored.

region

Character of length 1, AWS region containing the S3 bucket. Set to NULL to use the default region.

part_size

Positive numeric of length 1, number of bytes for each part of a multipart upload. (Except the last part, which is the remainder.) In a multipart upload, each part must be at least 5 MB.

endpoint

Character of length 1, URL endpoint for S3 storage. Defaults to the Amazon AWS endpoint if NULL. Example: To use the S3 protocol with Google Cloud Storage, set endpoint = "https://storage.googleapis.com" and region = "auto". Also make sure to create HMAC access keys in the Google Cloud Storage console (under Settings => Interoperability) and set the AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables accordingly. After that, you should be able to use S3 storage formats with Google Cloud storage buckets. There is one limitation, however: even if your bucket has object versioning turned on, targets may fail to record object versions. Google Cloud Storage in particular has this incompatibility.

Value

Object of class "tar_resources_aws", to be supplied to the aws argument of tar_resources().

Details

See the cloud storage section of https://books.ropensci.org/targets/data.html for details for instructions.

Resources

Functions tar_target() and tar_option_set() each takes an optional resources argument to supply non-default settings of various optional backends for data storage and high-performance computing. The tar_resources() function is a helper to supply those settings in the correct manner. Resources are all-or-nothing: if you specify any resources with tar_target(), all the resources from tar_option_get("resources") are dropped for that target. In other words, if you write tar_option_set(resources = resources_1) and then tar_target(x, my_command(), resources = resources_2), then everything in resources_1 is discarded for target x.

Examples

# Somewhere in you target script file (usually _targets.R):
tar_target(
  name,
  command(),
  format = "qs",
  repository = "aws",
  resources = tar_resources(
    aws = tar_resources_aws(bucket = "yourbucketname"),
    qs = tar_resources_qs(preset = "fast")
  )
)
#> <tar_stem> 
#>   name: name 
#>   command:
#>     command() 
#>   format: qs 
#>   repository: aws 
#>   iteration method: vector 
#>   error mode: stop 
#>   memory mode: persistent 
#>   storage mode: main 
#>   retrieval mode: main 
#>   deployment mode: worker 
#>   priority: 0 
#>   resources:
#>     aws: <environment>
#>     qs: <environment> 
#>   cue:
#>     mode: thorough
#>     command: TRUE
#>     depend: TRUE
#>     format: TRUE
#>     repository: TRUE
#>     iteration: TRUE
#>     file: TRUE 
#>   packages:
#>     targets
#>     stats
#>     graphics
#>     grDevices
#>     utils
#>     datasets
#>     methods
#>     base 
#>   library:
#>     NULL