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Command line tools

The format sub-command in the the the kafka-storage.sh tool will include two new properties when producing meta.properties: directory.id and directory.ids. This sub-command already supports  formatting formatting more than one log directory — by expecting a list of configured log.dirs  —  and "formatting" only the ones that need so.  All configured log directories must be available for kafka-storage.sh format to run successfullyWhen multiple log.dirs are configured, a new property will be included in meta.properties — directory.id — which will identify each log directory with a UUID. The UUID is randomly generated for each log directory.

meta.properties

Two new properties directory.id and directory.ids will be added to When multiple log.dirs are configured, a new property — directory.id — will be expected in the meta.properties file in each log directory , including the metadata.configured under log.dirdirs. The first property, directory.id indicates property 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 updatedwhere the file is located. If any of the meta.properties files does not contain directory.id one will be randomly generated and the file will be updated upon Broker startup. The kafka-storage.sh  tool  tool will be extended to generate or update the two properties this property as described in the previous section.

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{ "name": "OnlineLogDirs", "type":  "[]uuid", "versions":  "3+", "taggedVersions": "3+", "tag": "0",
  "about": "Log directories configured in this broker which are available." },
{ "name": "OfflineLogDirs", "type":  "[]uuidbool", "versions":  "3+",
 "taggedVersions": "3+", "tag"about": "1",
True if "about": "Logany log directories configured in this broker which are not available." }

PartitionRecord and PartitionChangeRecord will both have a new Assignment field which replaces the current Replicas field:

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