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@@ -8,7 +8,7 @@ Data streamed to HDFS using the [RADAR HDFS sink connector](https://github.com/R
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This package is available as docker image [`radarbase/radar-hdfs-restructure`](https://hub.docker.com/r/radarbase/radar-hdfs-restructure). The entrypoint of the image is the current application. So in all of the commands listed in usage, replace `radar-hdfs-restructure` with for example:
By default, files records are not deduplicated after writing. To enable this behaviour, specify the option `--deduplicate` or `-d`. This set to false by default because of an issue with Biovotion data. Please see - [issue #16](https://github.com/RADAR-base/Restructure-HDFS-topic/issues/16) before enabling it. Deduplication can also be enabled or disabled per topic using the config file. If lines should be deduplicated using a subset of fields, e.g. only `sourceId` and `time` define a unique record and only the last record with duplicate values should be kept, then specify `topics: <topicName>: deduplicateFields: [sourceId, time]`.
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By default, files records are not deduplicated after writing. To enable this behaviour, specify the option `--deduplicate` or `-d`. This set to false by default because of an issue with Biovotion data. Please see - [issue #16](https://github.com/RADAR-base/Restructure-HDFS-topic/issues/16) before enabling it. Deduplication can also be enabled or disabled per topic using the config file. If lines should be deduplicated using a subset of fields, e.g. only `sourceId` and `time` define a unique record and only the last record with duplicate values should be kept, then specify `topics: <topicName>: deduplication: distinctFields: [key.sourceId, value.time]`.
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### Compression
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Another option is to output the data in compressed form. All files will get the `gz` suffix, and can be decompressed with a GZIP decoder. Note that for a very small number of records, this may actually increase the file size.
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Another option is to output the data in compressed form. All files will get the `gz` suffix, and can be decompressed with a GZIP decoder. Note that for a very small number of records, this may actually increase the file size. Zip compression is also available.
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