adls.read.direct: Open and read a file.

In Microsoft/AzureSMR: Manage and Interact with Azure Resources

Description

Open and read a file.

Usage

adls.read.direct(azureActiveContext, azureDataLakeAccount, relativePath, offset,
  length, bufferSize, verbose = FALSE)

Arguments

azureActiveContext	A container used for caching variables used by AzureSMR, created by createAzureContext()
azureDataLakeAccount	Name of the Azure Data Lake account.
relativePath	Relative path of a file/directory.
offset	Provide the offset to read from.
length	Provide length of data to read.
bufferSize	Size of the buffer to be used. (not honoured).
verbose	Print tracing information (default FALSE).

Details

Exceptions - IOException

Value

raw contents of the file.

References

https://docs.microsoft.com/en-us/azure/data-lake-store/data-lake-store-data-operations-rest-api#read-data

See Also

https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Open_and_Read_a_File

https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Offset

https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Length

https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Buffer_Size

https://hadoop.apache.org/docs/current/api/org/apache/hadoop/fs/FileSystem.html#open-org.apache.hadoop.fs.Path-int-

Other Azure Data Lake Store functions: adls.append.core, adls.append.direct, adls.append, adls.concat, adls.create, adls.delete, adls.file.info, adls.fileinputstream.available, adls.fileinputstream.close, adls.fileinputstream.create, adls.fileinputstream.getpos, adls.fileinputstream.length, adls.fileinputstream.readfromservice, adls.fileinputstream.readfully, adls.fileinputstream.read, adls.fileinputstream.seek, adls.fileinputstream.skip, adls.fileoutputstream.close, adls.fileoutputstream.create, adls.fileoutputstream.flush, adls.fileoutputstream.write, adls.ls, adls.mkdir, adls.read.core, adls.read, adls.rename, createAdlExponentialBackoffRetryPolicy, createAdlNonIdempotentRetryPolicy, createAdlRetryPolicy, shouldRetry.adlExponentialBackoffRetryPolicy, shouldRetry.adlNonIdempotentRetryPolicy, shouldRetry

Microsoft/AzureSMR documentation built on July 7, 2019, 11:25 p.m.