EVL

Table of Contents


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Mv

(since EVL 1.0)

Move <source>... to <dest>, where both might be one of:

<local_path>
hdfs://<path>
gs://<bucket>/<path>
s3://<bucket>/<path>
sftp://<path>

So then local files it calls standard ‘mv’ command to copy files.

But when <source> and/or <dest> contain URI like ‘hdfs://’, ‘s3://’, ‘gs://’ or ‘sftp://’ (i.e. Hadoop FS, Amazon S3, Google Storage and SFTP), then it calls appropriate commands to move (or copy and delete) from/to such source/destination.

When more than one <source> is specified, then URI prefix must be the same for all of them.

Note: All above URIs are supported only in EVL Enterprise Edition.

Cp

is to be used in EVS job structure definition file or in EWS workflow structure definition.

evl cp

is intended for standalone usage, i.e. to be invoked from command line.

Using this command might keep your code clean, but for more complex copying better use appropriate commands directly, as it gives you all the available options for particular storage or protocol type.

Synopsis

syntax/Mv
Mv
  [-f|--force] <source>... <dest>

evl mv
  [-f|--force] <source>... <dest>
  [-v|--verbose]

evl mv
  ( --help | --usage | --version )

Options

-f, --force

destination will be overwritten if exists

Standard options:

--help

print this help and exit

--usage

print short usage information and exit

-v, --verbose

print to stderr info/debug messages of the component

--version

print version and exit

Examples

  1. This line in EVL job (an ‘evs’ file):
    Mv hdfs:///some/path/to/file /some/local/path/
    

    will call:

    evl_hdfs_get hdfs:///some/path/file /some/local/path/
    evl_hdfs_rm hdfs:///some/path/file
    
  2. This line in EVL job (an ‘evs’ file):
    Mv /some/local/path/file hdfs:///some/path/
    

    will call:

    evl_hdfs_put /some/local/path/file hdfs:///some/path/
    rm /some/local/path/file
    
  3. This line in EVL job (an ‘evs’ file):
    Mv hdfs:///some/path/file hdfs:///other/path/
    

    will call:

    evl_hdfs_cp hdfs:///some/path/file hdfs:///other/path/
    evl_hdfs_rm hdfs:///some/path/file
    
  4. This line in EVL job (an ‘evs’ file):
    Mv /some/local/path/file /other/local/path/
    

    will call:

    mv /some/local/path/file /other/local/path/
    

Where defauls for ‘evl_hdfs_*’ variables are:

function evl_hdfs_cp  { hdfs dfs -cp  ; }
function evl_hdfs_get { hdfs dfs -get ; }
function evl_hdfs_put { hdfs dfs -put ; }
function evl_hdfs_rm  { hdfs dfs -rm ; }