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Command line tools

The format  sub sub-command in the the kafka-storage.sh  tool will produce  tool will include two new properties when producing meta.properties  in a new format described in the following section which includes two new properties : directory.id and directory.ids. This sub-command already supports a formatting  formatting more than one log directory — by expecting a list of configured log.dirs  —  and "formatting" only the ones that need so. All  All configured log directories must be available for kafka-storage.sh format to format to run successfully.

meta.properties

The meta.properties  version field will be bumped from 1 to 2. Two new properties directory.id and directory.ids will be added to the meta.properties file in each log directory, including the metadata.log.dir . The first property, directory.id indicates the UUID for the log directory where the file is located, the second property, directory.ids  lists all the UUIDs for all the configured log directories. If the meta.properties  file doesn't exist for the metadata.log.dir  the Kafka node will fail to start. If the meta.properties  file exists but it doesn't contain these two properties a new one will be generated and the meta.properties  files will be updated. The kafka-storage.sh  tool will be extended to generate or update the two properties as described in the previous section.

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