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| <head> |
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| <title>FetchGridFS</title> |
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| <!-- Processor Documentation ================================================== --> |
| <h2>Description:</h2> |
| <p> |
| This processor retrieves one or more files from GridFS. The query can be provided in one of three ways: |
| </p> |
| |
| <ul> |
| <li>Query configuration parameter.</li> |
| <li>Built for you by configuring the filename parameter. (Note: this is just a filename, Mongo queries cannot be |
| embedded in the field).</li> |
| <li>Retrieving the query from the flowfile contents.</li> |
| </ul> |
| |
| <p> |
| The processor can also be configured to either commit only once at the end of a fetch operation or after each file |
| that is retrieved. Multiple commits is generally only necessary when retrieving a lot of data from GridFS as measured |
| in total data size, not file count, to ensure that the disks NiFi is using are not overloaded. |
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