Name	Description	Type	Default	Valid Values	Importance
cleanup.policy	Should old segments in this log be deleted or deduplicated?	string	delete	[compact, delete]	medium
compression.type	Specify the final compression type for a given topic. This configuration accepts the standard compression codecs ('gzip', 'snappy', lz4). It additionally accepts 'uncompressed' which is equivalent to no compression; and 'producer' which means retain the original compression codec set by the producer.	string	producer	[uncompressed, snappy, lz4, gzip, producer]	medium
delete.retention.ms	The time to retain delete markers in the log. Only applicable for logs that are being compacted.	long	86400000	[0,...]	medium
file.delete.delay.ms	The time to wait before deleting a file from the filesystem	long	60000	[0,...]	medium
flush.messages	The number of messages that can be written to the log before a flush is forced	long	9223372036854775807	[0,...]	medium
flush.ms	The amount of time the log can have dirty data before a flush is forced	long	9223372036854775807	[0,...]	medium
index.interval.bytes	The approximate number of bytes between index entries	int	4096	[0,...]	medium
max.message.bytes	The maximum size of a message	int	1000012	[0,...]	medium
message.format.version	Specify the message format version the broker will use to append messages to the logs. The value should be a valid ApiVersion. Some examples are: 0.8.2, 0.9.0.0, 0.10.0, check ApiVersion for more details. By setting a particular message format version, the user is certifying that all the existing messages on disk are smaller or equal than the specified version. Setting this value incorrectly will cause consumers with older versions to break as they will receive messages with a format that they don't understand.	string	0.10.0-IV1		medium
message.timestamp.difference.max.ms	The maximum difference allowed between the timestamp when a broker receives a message and the timestamp specified in the message. If message.timestamp.type=CreateTime, a message will be rejected if the difference in timestamp exceeds this threshold. This configuration is ignored if message.timestamp.type=LogAppendTime.	long	9223372036854775807	[0,...]	medium
message.timestamp.type	Define whether the timestamp in the message is message create time or log append time. The value should be either `CreateTime` or `LogAppendTime`	string	CreateTime		medium
min.cleanable.dirty.ratio	The ratio of bytes that are available for cleaning to the bytes already cleaned	double	0.5	[0,...,1]	medium
min.insync.replicas	If number of insync replicas drops below this number, we stop accepting writes with -1 (or all) required acks	int	1	[1,...]	medium
preallocate	Should pre allocate file when create new segment?	boolean	false		medium
retention.bytes	The approximate total number of bytes this log can use	long	-1		medium
retention.ms	The approximate maximum age of the last segment that is retained	long	604800000		medium
segment.bytes	The hard maximum for the size of a segment file in the log	int	1073741824	[14,...]	medium
segment.index.bytes	The maximum size of an index file	int	10485760	[0,...]	medium
segment.jitter.ms	The maximum random jitter subtracted from segmentMs to avoid thundering herds of segment rolling	long	0	[0,...]	medium
segment.ms	The soft maximum on the amount of time before a new log segment is rolled	long	604800000	[0,...]	medium
unclean.leader.election.enable	Indicates whether unclean leader election is enabled	boolean	true		medium