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| <title>CreateHadoopSequenceFile</title> |
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| <!-- Processor Documentation ================================================== --> |
| <h2>Description:</h2> |
| <p>This processor is used to create a Hadoop Sequence File, which essentially is a file of key/value pairs. The key |
| will be a file name and the value will be the flow file content. The processor will take either a merged (a.k.a. packaged) flow |
| file or a singular flow file. Historically, this processor handled the merging by type and size or time prior to creating a |
| SequenceFile output; it no longer does this. If creating a SequenceFile that contains multiple files of the same type is desired, |
| precede this processor with a <code>RouteOnAttribute</code> processor to segregate files of the same type and follow that with a |
| <code>MergeContent</code> processor to bundle up files. If the type of files is not important, just use the |
| <code>MergeContent</code> processor. When using the <code>MergeContent</code> processor, the following Merge Formats are |
| supported by this processor: |
| <ul> |
| <li>TAR</li> |
| <li>ZIP</li> |
| <li>FlowFileStream v3</li> |
| </ul> |
| The created SequenceFile is named the same as the incoming FlowFile with the suffix '.sf'. For incoming FlowFiles that are |
| bundled, the keys in the SequenceFile are the individual file names, the values are the contents of each file. |
| </p> |
| NOTE: The value portion of a key/value pair is loaded into memory. While there is a max size limit of 2GB, this could cause memory |
| issues if there are too many concurrent tasks and the flow file sizes are large. |
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