Write FlowFile data to Hadoop Distributed File System (HDFS)
hadoop, HDFS, put, copy, filesystem
In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the NiFi Expression Language.
Name | Default Value | Allowable Values | Description |
---|---|---|---|
Hadoop Configuration Resources | A file or comma separated list of files which contains the Hadoop file system configuration. Without this, Hadoop will search the classpath for a 'core-site.xml' and 'hdfs-site.xml' file or will revert to a default configuration. | ||
Kerberos Principal | Kerberos principal to authenticate as. Requires nifi.kerberos.krb5.file to be set in your nifi.properties | ||
Kerberos Keytab | Kerberos keytab associated with the principal. Requires nifi.kerberos.krb5.file to be set in your nifi.properties | ||
Kerberos Relogin Period | 4 hours | Period of time which should pass before attempting a kerberos relogin | |
Directory | The parent HDFS directory to which files should be written Supports Expression Language: true | ||
Conflict Resolution Strategy | fail |
| Indicates what should happen when a file with the same name already exists in the output directory |
Block Size | Size of each block as written to HDFS. This overrides the Hadoop Configuration | ||
IO Buffer Size | Amount of memory to use to buffer file contents during IO. This overrides the Hadoop Configuration | ||
Replication | Number of times that HDFS will replicate each file. This overrides the Hadoop Configuration | ||
Permissions umask | A umask represented as an octal number which determines the permissions of files written to HDFS. This overrides the Hadoop Configuration dfs.umaskmode | ||
Remote Owner | Changes the owner of the HDFS file to this value after it is written. This only works if NiFi is running as a user that has HDFS super user privilege to change owner | ||
Remote Group | Changes the group of the HDFS file to this value after it is written. This only works if NiFi is running as a user that has HDFS super user privilege to change group | ||
Compression codec | NONE |
| No Description Provided. |
Name | Description |
---|---|
failure | Files that could not be written to HDFS for some reason are transferred to this relationship |
success | Files that have been successfully written to HDFS are transferred to this relationship |
Name | Description |
---|---|
filename | The name of the file written to HDFS comes from the value of this attribute. |