adls.read: Open a file and return an adlFileInputStream

In Microsoft/AzureSMR: Manage and Interact with Azure Resources

Description

Open a file and return an adlFileInputStream

Usage

adls.read(azureActiveContext, azureDataLakeAccount, relativePath, 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.
bufferSize	Size of the buffer to be used. (not honoured).
verbose	Print tracing information (default FALSE).

Details

Exceptions - IOException

Value

an object of adlFileInputStream.

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.direct, adls.rename, createAdlExponentialBackoffRetryPolicy, createAdlNonIdempotentRetryPolicy, createAdlRetryPolicy, shouldRetry.adlExponentialBackoffRetryPolicy, shouldRetry.adlNonIdempotentRetryPolicy, shouldRetry

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