The HDFS3 sink connector pulls the messages from Pulsar topics and persists the messages to HDFS files.

Configuration

The configuration of the HDFS3 sink connector has the following properties.

Property

Name	Type	Required	Default	Description
`hdfsConfigResources`	String	true	None	A file or a comma-separated list containing the Hadoop file system configuration.<br/><br/>Example<br/>'core-site.xml'<br/>'hdfs-site.xml'
`directory`	String	true	None	The HDFS directory where files read from or written to.
`encoding`	String	false	None	The character encoding for the files.<br/><br/>Example<br/>UTF-8<br/>ASCII
`compression`	Compression	false	None	The compression code used to compress or de-compress the files on HDFS. <br/><br/>Below are the available options:<br/><li>BZIP2<br/><li>DEFLATE<br/><li>GZIP<br/><li>LZ4<br/><li>SNAPPY
`kerberosUserPrincipal`	String	false	None	The principal account of Kerberos user used for authentication.
`keytab`	String	false	None	The full pathname of the Kerberos keytab file used for authentication.
`filenamePrefix`	String	false	None	The prefix of the files created inside the HDFS directory.<br/><br/>Example<br/> The value of topicA result in files named topicA-.
`fileExtension`	String	false	None	The extension added to the files written to HDFS.<br/><br/>Example<br/>'.txt'<br/> '.seq'
`separator`	char	false	None	The character used to separate records in a text file. <br/><br/>If no value is provided, the contents from all records are concatenated together in one continuous byte array.
`syncInterval`	long	false	0	The interval between calls to flush data to HDFS disk in milliseconds.
`maxPendingRecords`	int	false	Integer.MAX_VALUE	The maximum number of records that hold in memory before acking. <br/><br/>Setting this property to 1 makes every record send to disk before the record is acked.<br/><br/>Setting this property to a higher value allows buffering records before flushing them to disk.

Example

Before using the HDFS3 sink connector, you need to create a configuration file through one of the following methods.

JSON

{
    "hdfsConfigResources": "core-site.xml",
    "directory": "/foo/bar",
    "filenamePrefix": "prefix",
    "compression": "SNAPPY"
}

YAML

configs:
    hdfsConfigResources: "core-site.xml"
    directory: "/foo/bar"
    filenamePrefix: "prefix"
    compression: "SNAPPY"