| Name | kafkacfg JSON |
| Version |
0.7.0
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| Summary | Kafka configuration inspector |
| upload_time | 2024-01-21 14:36:04 |
| maintainer | |
| docs_url | None |
| author | Balthazar Rouberol |
| requires_python | >=3.9,<4.0 |
| license | MIT |
| keywords |
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| VCS |
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| bugtrack_url |
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| requirements |
No requirements were recorded.
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# `kafkacfg`: Kafka configuration analyzer CLI
Kafka has _a lot_ of parameters, tunables and knobs, and the [configuration page](https://kafka.apache.org/documentation/#brokerconfigs) isn't the easiest to parse. `kafkacfg` allows you to analyze your kafka configuration file, to help you understand what it does.
> [!NOTE]
> all `kafkacfg` commands (except `kafkacfg recommends`) can be passed a `--source librdkafka` argument, to work on the `librdkafka` [configuration parameters](https://github.com/confluentinc/librdkafka/blob/master/CONFIGURATION.md) instead of the [Kafka parameters](https://kafka.apache.org/documentation/#brokerconfigs)
### `kafkacfg explain`
This command is used to display extra information about each configuration tunable used in your configuration file.
```console
$ cat samples/server.properties
num.io.threads = 10
broker.id = 1001
auto.create.topics.enable = false
background.threads = 10
```
```console
$ kafkacfg explain -k 3.4 samples/server.properties | jq .
[
{
"name": "num.io.threads",
"override": "10",
"description": "The number of threads that the server uses for processing requests, which may include disk I/O",
"scope": "broker",
"type": "int",
"default": "8",
"valid_values": "[1,...]",
"importance": "high",
"update_mode": "cluster-wide"
},
{
"name": "broker.id",
"override": "1001",
"description": "The broker id for this server. If unset, a unique broker id will be generated.To avoid conflicts between zookeeper generated broker id's and user configured broker id's, generated broker ids start from reserved.broker.max.id + 1.",
"scope": "broker",
"type": "int",
"default": "-1",
"valid_values": null,
"importance": "high",
"update_mode": "read-only"
},
{
"name": "auto.create.topics.enable",
"override": "false",
"description": "Enable auto creation of topic on the server",
"scope": "broker",
"type": "boolean",
"default": "true",
"valid_values": null,
"importance": "high",
"update_mode": "read-only"
},
{
"name": "background.threads",
"override": "10",
"description": "The number of threads to use for various background processing tasks",
"scope": "broker",
"type": "int",
"default": "10",
"valid_values": "[1,...]",
"importance": "high",
"update_mode": "cluster-wide"
}
]
```
This format makes it easy to pipe it through table formatting tools such as `jtbl`:
```console
$ kafkacfg explain -k 3.4 samples/server.properties | jtbl
╒═══════════════════════════╤════════════╤═══════════════════════════════════════════════════════════════════════╤═════════╤═════════╤═══════════╤════════════════╤══════════════╤═══════════════╕
│ name │ override │ description │ scope │ type │ default │ valid_values │ importance │ update_mode │
╞═══════════════════════════╪════════════╪═══════════════════════════════════════════════════════════════════════╪═════════╪═════════╪═══════════╪════════════════╪══════════════╪═══════════════╡
│ num.io.threads │ 10 │ The number of threads that the server uses for processing requests, w │ broker │ int │ 8 │ [1,...] │ high │ cluster-wide │
│ │ │ hich may include disk I/O │ │ │ │ │ │ │
├───────────────────────────┼────────────┼───────────────────────────────────────────────────────────────────────┼─────────┼─────────┼───────────┼────────────────┼──────────────┼───────────────┤
│ broker.id │ 1001 │ The broker id for this server. If unset, a unique broker id will be g │ broker │ int │ -1 │ │ high │ read-only │
│ │ │ enerated.To avoid conflicts between zookeeper generated broker id's a │ │ │ │ │ │ │
│ │ │ nd user configured broker id's, generated broker ids start from reser │ │ │ │ │ │ │
│ │ │ ved.broker.max.id + 1. │ │ │ │ │ │ │
├───────────────────────────┼────────────┼───────────────────────────────────────────────────────────────────────┼─────────┼─────────┼───────────┼────────────────┼──────────────┼───────────────┤
│ auto.create.topics.enable │ false │ Enable auto creation of topic on the server │ broker │ boolean │ true │ │ high │ read-only │
├───────────────────────────┼────────────┼───────────────────────────────────────────────────────────────────────┼─────────┼─────────┼───────────┼────────────────┼──────────────┼───────────────┤
│ background.threads │ 10 │ The number of threads to use for various background processing tasks │ broker │ int │ 10 │ [1,...] │ high │ cluster-wide │
╘═══════════════════════════╧════════════╧═══════════════════════════════════════════════════════════════════════╧═════════╧═════════╧═══════════╧════════════════╧══════════════╧═══════════════╛
```
You can also explain producer and consumer level configurations, by using the `-c / --config-type` flag:
```
$ cat -p producer.properties
compression.type=lz4
retries=2
$ kafkacfg explain -k 1.1 --config-type producer producer.properties | jtbl
╒══════════════════╤════════════╤═══════════════════════════════════════════════════════════════════════════════════════════════╤══════════╤════════╤═══════════╤════════════════════╤══════════════╕
│ name │ override │ description │ scope │ type │ default │ valid_values │ importance │
╞══════════════════╪════════════╪═══════════════════════════════════════════════════════════════════════════════════════════════╪══════════╪════════╪═══════════╪════════════════════╪══════════════╡
│ compression.type │ lz4 │ The compression type for all data generated by the producer. The default is none (i.e. no com │ producer │ string │ none │ │ high │
│ │ │ pression). Valid values are none, gzip, snappy, or lz4. Compression is of full batches of da │ │ │ │ │ │
│ │ │ ta, so the efficacy of batching will also impact the compression ratio (more batching means b │ │ │ │ │ │
│ │ │ etter compression). │ │ │ │ │ │
├──────────────────┼────────────┼───────────────────────────────────────────────────────────────────────────────────────────────┼──────────┼────────┼───────────┼────────────────────┼──────────────┤
│ retries │ 2 │ Setting a value greater than zero will cause the client to resend any record whose send fails │ producer │ int │ 0 │ [0,...,2147483647] │ high │
│ │ │ with a potentially transient error. Note that this retry is no different than if the client │ │ │ │ │ │
│ │ │ resent the record upon receiving the error. Allowing retries without setting max.in.flight.re │ │ │ │ │ │
│ │ │ quests.per.connection to 1 will potentially change the ordering of records because if two bat │ │ │ │ │ │
│ │ │ ches are sent to a single partition, and the first fails and is retried but the second succee │ │ │ │ │ │
│ │ │ ds, then the records in the second batch may appear first. │ │ │ │ │ │
╘══════════════════╧════════════╧═══════════════════════════════════════════════════════════════════════════════════════════════╧══════════╧════════╧═══════════╧════════════════════╧══════════════╛
```
### `kafkacfg overrides`
The `overrides` command will only display and enrich the configuration tunables with non-default values, to help you understand in what way your kafka configuration was tuned:
```console
$ kafkacfg overrides -k 3.4 samples/server.properties | jtbl
name override description scope type default valid_values importance update_mode
------------------------- ---------- ---------------------------------------------------------------------------------------------- ------- ------- --------- -------------- ------------ -------------
num.io.threads 10 The number of threads that the server uses for processing requests, which may include disk I/O broker int 8 [1,...] high cluster-wide
auto.create.topics.enable false Enable auto creation of topic on the server broker boolean true high read-only
```
You can also explain producer and consumer level configurations override, by using the `-c / --config-type` flag.
### `kafkacfg query`
The `query` command allows you to filter the kafka configuration tunables with a custom query, while enriching the filter results with the usual metadata and potential override value.
```console
$ kafkacfg query -v 1.1 'name=replica.fetch.min.bytes' | jtbl
name override description scope type default valid_values importance update_mode
----------------------- ---------- ---------------------------------------------------------------------------------------------------- ------- ------ --------- -------------- ------------ -------------
replica.fetch.min.bytes Minimum bytes expected for each fetch response. If not enough bytes, wait up to replicaMaxWaitTimeMs broker int 1 high read-only
```
You can also compose filter predicates and even use `*` for a glob match:
```console
$ kafkacfg query -v 3.4 "name=replica.*.bytes;importance=high" | jtbl
╒═════════════════════════════════════╤════════════╤═══════════════════════════════════════════════════╤═════════╤════════╤══════════════════════╤════════════════╤══════════════╤═══════════════╕
│ name │ override │ description │ scope │ type │ default │ valid_values │ importance │ update_mode │
╞═════════════════════════════════════╪════════════╪═══════════════════════════════════════════════════╪═════════╪════════╪══════════════════════╪════════════════╪══════════════╪═══════════════╡
│ replica.fetch.min.bytes │ │ Minimum bytes expected for each fetch response. I │ broker │ int │ 1 │ │ high │ read-only │
│ │ │ f not enough bytes, wait up to replica.fetch.wait │ │ │ │ │ │ │
│ │ │ .max.ms (broker config). │ │ │ │ │ │ │
├─────────────────────────────────────┼────────────┼───────────────────────────────────────────────────┼─────────┼────────┼──────────────────────┼────────────────┼──────────────┼───────────────┤
│ replica.socket.receive.buffer.bytes │ │ The socket receive buffer for network requests │ broker │ int │ 65536 (64 kibibytes) │ │ high │ read-only │
╘═════════════════════════════════════╧════════════╧═══════════════════════════════════════════════════╧═════════╧════════╧══════════════════════╧════════════════╧══════════════╧═══════════════╛
```
### `kafkacfg recommends`
The `recommends` command emits sourced configuration recommendation based on broker attributes (number of CPUs, number of disks, etc).
> _Note_: These are suggestions more than absolute thruths. We encourage you to read the sources, test the configuration values and make your own mind.
```console
$ kafkacfg recommends -k 3.4 --broker-num-cpus 24 --broker-num-disks 12 server.properties
Recommendation 1: set num.io.threads == 12 (num_disks)
* https://strimzi.io/blog/2021/06/08/broker-tuning/
Recommendation 2: set replica.fetch.min.bytes == 512
* https://azure.microsoft.com/en-us/blog/processing-trillions-of-events-per-day-with-apache-kafka-on-azure/
Recommendation 3: set socket.receive.buffer.bytes == 512
* https://azure.microsoft.com/en-us/blog/processing-trillions-of-events-per-day-with-apache-kafka-on-azure/
* https://strimzi.io/blog/2021/06/08/broker-tuning/
Recommendation 4: set socket.send.buffer.bytes == 1048576
* https://azure.microsoft.com/en-us/blog/processing-trillions-of-events-per-day-with-apache-kafka-on-azure/
* https://strimzi.io/blog/2021/06/08/broker-tuning/
Recommendation 5: set replica.socket.receive.buffer.bytes == 1048576
* https://azure.microsoft.com/en-us/blog/processing-trillions-of-events-per-day-with-apache-kafka-on-azure/
```
### `kafkacfg diff`
The `diff` command displays what configuration tunables have changed between 2 kafka versions, whether they have been deprecated, newly introduced, or their default value has changed.
```console
$ kafkacfg diff --from-version 3.5 --to-version 3.6 | jtbl
╒═══════════════════════════════════════════════╤══════════╤════════════════════════════════════════════════════════════╤═════════╤═════════╤════════════════════════════════════════════════════════════╤══════════════╤═══════════════╤═════════════════╤════════════════════════════════════════════════════════════╤═════════════════════════════════════╕
│ name │ status │ description │ scope │ type │ valid_values │ importance │ update_mode │ default (3.5) │ default (3.6) │ server_default_property │
╞═══════════════════════════════════════════════╪══════════╪════════════════════════════════════════════════════════════╪═════════╪═════════╪════════════════════════════════════════════════════════════╪══════════════╪═══════════════╪═════════════════╪════════════════════════════════════════════════════════════╪═════════════════════════════════════╡
│ log.local.retention.bytes │ new │ The maximum size of local log segments that can grow for a │ broker │ long │ [-2,...] │ medium │ cluster-wide │ [ABSENT] │ -2 │ │
│ │ │ partition before it gets eligible for deletion. Default v │ │ │ │ │ │ │ │ │
│ │ │ alue is -2, it represents `log.retention.bytes` value to b │ │ │ │ │ │ │ │ │
│ │ │ e used. The effective value should always be less than or │ │ │ │ │ │ │ │ │
│ │ │ equal to `log.retention.bytes` value. │ │ │ │ │ │ │ │ │
├───────────────────────────────────────────────┼──────────┼────────────────────────────────────────────────────────────┼─────────┼─────────┼────────────────────────────────────────────────────────────┼──────────────┼───────────────┼─────────────────┼────────────────────────────────────────────────────────────┼─────────────────────────────────────┤
│ log.local.retention.ms │ new │ The number of milliseconds to keep the local log segments │ broker │ long │ [-2,...] │ medium │ cluster-wide │ [ABSENT] │ -2 │ │
│ │ │ before it gets eligible for deletion. Default value is -2, │ │ │ │ │ │ │ │ │
│ │ │ it represents `log.retention.ms` value is to be used. The │ │ │ │ │ │ │ │ │
│ │ │ effective value should always be less than or equal to `l │ │ │ │ │ │ │ │ │
│ │ │ og.retention.ms` value. │ │ │ │ │ │ │ │ │
├───────────────────────────────────────────────┼──────────┼────────────────────────────────────────────────────────────┼─────────┼─────────┼────────────────────────────────────────────────────────────┼──────────────┼───────────────┼─────────────────┼────────────────────────────────────────────────────────────┼─────────────────────────────────────┤
│ log.message.timestamp.after.max.ms │ new │ This configuration sets the allowable timestamp difference │ broker │ long │ [0,...] │ medium │ cluster-wide │ [ABSENT] │ 9223372036854775807 │ │
│ │ │ between the message timestamp and the broker's timestamp. │ │ │ │ │ │ │ │ │
│ │ │ The message timestamp can be later than or equal to the b │ │ │ │ │ │ │ │ │
│ │ │ roker's timestamp, with the maximum allowable difference d │ │ │ │ │ │ │ │ │
│ │ │ etermined by the value set in this configuration. If log.m │ │ │ │ │ │ │ │ │
│ │ │ essage.timestamp.type=CreateTime, the message will be reje │ │ │ │ │ │ │ │ │
│ │ │ cted if the difference in timestamps exceeds this specifie │ │ │ │ │ │ │ │ │
│ │ │ d threshold. This configuration is ignored if log.message. │ │ │ │ │ │ │ │ │
│ │ │ timestamp.type=LogAppendTime. │ │ │ │ │ │ │ │ │
├───────────────────────────────────────────────┼──────────┼────────────────────────────────────────────────────────────┼─────────┼─────────┼────────────────────────────────────────────────────────────┼──────────────┼───────────────┼─────────────────┼────────────────────────────────────────────────────────────┼─────────────────────────────────────┤
...
```
You can also highlight changes in producer and consumer level configurations, by using the `-c / --config-type` flag.
Raw data
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"description": "# `kafkacfg`: Kafka configuration analyzer CLI\n\nKafka has _a lot_ of parameters, tunables and knobs, and the [configuration page](https://kafka.apache.org/documentation/#brokerconfigs) isn't the easiest to parse. `kafkacfg` allows you to analyze your kafka configuration file, to help you understand what it does.\n\n> [!NOTE]\n> all `kafkacfg` commands (except `kafkacfg recommends`) can be passed a `--source librdkafka` argument, to work on the `librdkafka` [configuration parameters](https://github.com/confluentinc/librdkafka/blob/master/CONFIGURATION.md) instead of the [Kafka parameters](https://kafka.apache.org/documentation/#brokerconfigs)\n\n\n### `kafkacfg explain`\n\nThis command is used to display extra information about each configuration tunable used in your configuration file.\n\n```console\n$ cat samples/server.properties\nnum.io.threads = 10\nbroker.id = 1001\nauto.create.topics.enable = false\nbackground.threads = 10\n```\n\n```console\n$ kafkacfg explain -k 3.4 samples/server.properties | jq .\n[\n {\n \"name\": \"num.io.threads\",\n \"override\": \"10\",\n \"description\": \"The number of threads that the server uses for processing requests, which may include disk I/O\",\n \"scope\": \"broker\",\n \"type\": \"int\",\n \"default\": \"8\",\n \"valid_values\": \"[1,...]\",\n \"importance\": \"high\",\n \"update_mode\": \"cluster-wide\"\n },\n {\n \"name\": \"broker.id\",\n \"override\": \"1001\",\n \"description\": \"The broker id for this server. If unset, a unique broker id will be generated.To avoid conflicts between zookeeper generated broker id's and user configured broker id's, generated broker ids start from reserved.broker.max.id + 1.\",\n \"scope\": \"broker\",\n \"type\": \"int\",\n \"default\": \"-1\",\n \"valid_values\": null,\n \"importance\": \"high\",\n \"update_mode\": \"read-only\"\n },\n {\n \"name\": \"auto.create.topics.enable\",\n \"override\": \"false\",\n \"description\": \"Enable auto creation of topic on the server\",\n \"scope\": \"broker\",\n \"type\": \"boolean\",\n \"default\": \"true\",\n \"valid_values\": null,\n \"importance\": \"high\",\n \"update_mode\": \"read-only\"\n },\n {\n \"name\": \"background.threads\",\n \"override\": \"10\",\n \"description\": \"The number of threads to use for various background processing tasks\",\n \"scope\": \"broker\",\n \"type\": \"int\",\n \"default\": \"10\",\n \"valid_values\": \"[1,...]\",\n \"importance\": \"high\",\n \"update_mode\": \"cluster-wide\"\n }\n]\n```\n\nThis format makes it easy to pipe it through table formatting tools such as `jtbl`:\n\n```console\n$ kafkacfg explain -k 3.4 samples/server.properties | jtbl\n\u2552\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2555\n\u2502 name \u2502 override \u2502 description \u2502 scope \u2502 type \u2502 default \u2502 valid_values \u2502 importance \u2502 update_mode \u2502\n\u255e\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2561\n\u2502 num.io.threads \u2502 10 \u2502 The number of threads that the server uses for processing requests, w \u2502 broker \u2502 int \u2502 8 \u2502 [1,...] \u2502 high \u2502 cluster-wide \u2502\n\u2502 \u2502 \u2502 hich may include disk I/O \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 broker.id \u2502 1001 \u2502 The broker id for this server. If unset, a unique broker id will be g \u2502 broker \u2502 int \u2502 -1 \u2502 \u2502 high \u2502 read-only \u2502\n\u2502 \u2502 \u2502 enerated.To avoid conflicts between zookeeper generated broker id's a \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 nd user configured broker id's, generated broker ids start from reser \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 ved.broker.max.id + 1. \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 auto.create.topics.enable \u2502 false \u2502 Enable auto creation of topic on the server \u2502 broker \u2502 boolean \u2502 true \u2502 \u2502 high \u2502 read-only \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 background.threads \u2502 10 \u2502 The number of threads to use for various background processing tasks \u2502 broker \u2502 int \u2502 10 \u2502 [1,...] \u2502 high \u2502 cluster-wide \u2502\n\u2558\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u255b\n```\n\nYou can also explain producer and consumer level configurations, by using the `-c / --config-type` flag:\n\n```\n$ cat -p producer.properties\ncompression.type=lz4\nretries=2\n$ kafkacfg explain -k 1.1 --config-type producer producer.properties | jtbl\n\u2552\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2555\n\u2502 name \u2502 override \u2502 description \u2502 scope \u2502 type \u2502 default \u2502 valid_values \u2502 importance \u2502\n\u255e\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2561\n\u2502 compression.type \u2502 lz4 \u2502 The compression type for all data generated by the producer. The default is none (i.e. no com \u2502 producer \u2502 string \u2502 none \u2502 \u2502 high \u2502\n\u2502 \u2502 \u2502 pression). Valid values are none, gzip, snappy, or lz4. Compression is of full batches of da \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 ta, so the efficacy of batching will also impact the compression ratio (more batching means b \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 etter compression). \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 retries \u2502 2 \u2502 Setting a value greater than zero will cause the client to resend any record whose send fails \u2502 producer \u2502 int \u2502 0 \u2502 [0,...,2147483647] \u2502 high \u2502\n\u2502 \u2502 \u2502 with a potentially transient error. Note that this retry is no different than if the client \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 resent the record upon receiving the error. Allowing retries without setting max.in.flight.re \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 quests.per.connection to 1 will potentially change the ordering of records because if two bat \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 ches are sent to a single partition, and the first fails and is retried but the second succee \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 ds, then the records in the second batch may appear first. \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2558\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u255b\n```\n\n### `kafkacfg overrides`\n\nThe `overrides` command will only display and enrich the configuration tunables with non-default values, to help you understand in what way your kafka configuration was tuned:\n\n```console\n$ kafkacfg overrides -k 3.4 samples/server.properties | jtbl\nname override description scope type default valid_values importance update_mode\n------------------------- ---------- ---------------------------------------------------------------------------------------------- ------- ------- --------- -------------- ------------ -------------\nnum.io.threads 10 The number of threads that the server uses for processing requests, which may include disk I/O broker int 8 [1,...] high cluster-wide\nauto.create.topics.enable false Enable auto creation of topic on the server broker boolean true high read-only\n```\n\nYou can also explain producer and consumer level configurations override, by using the `-c / --config-type` flag.\n\n### `kafkacfg query`\n\nThe `query` command allows you to filter the kafka configuration tunables with a custom query, while enriching the filter results with the usual metadata and potential override value.\n\n```console\n$ kafkacfg query -v 1.1 'name=replica.fetch.min.bytes' | jtbl\nname override description scope type default valid_values importance update_mode\n----------------------- ---------- ---------------------------------------------------------------------------------------------------- ------- ------ --------- -------------- ------------ -------------\nreplica.fetch.min.bytes Minimum bytes expected for each fetch response. If not enough bytes, wait up to replicaMaxWaitTimeMs broker int 1 high read-only\n```\n\nYou can also compose filter predicates and even use `*` for a glob match:\n\n```console\n$ kafkacfg query -v 3.4 \"name=replica.*.bytes;importance=high\" | jtbl\n\u2552\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2555\n\u2502 name \u2502 override \u2502 description \u2502 scope \u2502 type \u2502 default \u2502 valid_values \u2502 importance \u2502 update_mode \u2502\n\u255e\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2561\n\u2502 replica.fetch.min.bytes \u2502 \u2502 Minimum bytes expected for each fetch response. I \u2502 broker \u2502 int \u2502 1 \u2502 \u2502 high \u2502 read-only \u2502\n\u2502 \u2502 \u2502 f not enough bytes, wait up to replica.fetch.wait \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 .max.ms (broker config). \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 replica.socket.receive.buffer.bytes \u2502 \u2502 The socket receive buffer for network requests \u2502 broker \u2502 int \u2502 65536 (64 kibibytes) \u2502 \u2502 high \u2502 read-only \u2502\n\u2558\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2567\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u255b\n```\n\n### `kafkacfg recommends`\n\nThe `recommends` command emits sourced configuration recommendation based on broker attributes (number of CPUs, number of disks, etc).\n\n> _Note_: These are suggestions more than absolute thruths. We encourage you to read the sources, test the configuration values and make your own mind.\n\n```console\n$ kafkacfg recommends -k 3.4 --broker-num-cpus 24 --broker-num-disks 12 server.properties\nRecommendation 1: set num.io.threads == 12 (num_disks)\n* https://strimzi.io/blog/2021/06/08/broker-tuning/\n\nRecommendation 2: set replica.fetch.min.bytes == 512\n* https://azure.microsoft.com/en-us/blog/processing-trillions-of-events-per-day-with-apache-kafka-on-azure/\n\nRecommendation 3: set socket.receive.buffer.bytes == 512\n* https://azure.microsoft.com/en-us/blog/processing-trillions-of-events-per-day-with-apache-kafka-on-azure/\n* https://strimzi.io/blog/2021/06/08/broker-tuning/\n\nRecommendation 4: set socket.send.buffer.bytes == 1048576\n* https://azure.microsoft.com/en-us/blog/processing-trillions-of-events-per-day-with-apache-kafka-on-azure/\n* https://strimzi.io/blog/2021/06/08/broker-tuning/\n\nRecommendation 5: set replica.socket.receive.buffer.bytes == 1048576\n* https://azure.microsoft.com/en-us/blog/processing-trillions-of-events-per-day-with-apache-kafka-on-azure/\n```\n\n\n### `kafkacfg diff`\n\nThe `diff` command displays what configuration tunables have changed between 2 kafka versions, whether they have been deprecated, newly introduced, or their default value has changed.\n\n\n```console\n\n$ kafkacfg diff --from-version 3.5 --to-version 3.6 | jtbl\n\u2552\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2564\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2555\n\u2502 name \u2502 status \u2502 description \u2502 scope \u2502 type \u2502 valid_values \u2502 importance \u2502 update_mode \u2502 default (3.5) \u2502 default (3.6) \u2502 server_default_property \u2502\n\u255e\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u256a\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2561\n\u2502 log.local.retention.bytes \u2502 new \u2502 The maximum size of local log segments that can grow for a \u2502 broker \u2502 long \u2502 [-2,...] \u2502 medium \u2502 cluster-wide \u2502 [ABSENT] \u2502 -2 \u2502 \u2502\n\u2502 \u2502 \u2502 partition before it gets eligible for deletion. Default v \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 alue is -2, it represents `log.retention.bytes` value to b \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 e used. The effective value should always be less than or \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 equal to `log.retention.bytes` value. \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 log.local.retention.ms \u2502 new \u2502 The number of milliseconds to keep the local log segments \u2502 broker \u2502 long \u2502 [-2,...] \u2502 medium \u2502 cluster-wide \u2502 [ABSENT] \u2502 -2 \u2502 \u2502\n\u2502 \u2502 \u2502 before it gets eligible for deletion. Default value is -2, \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 it represents `log.retention.ms` value is to be used. The \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 effective value should always be less than or equal to `l \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 og.retention.ms` value. \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 log.message.timestamp.after.max.ms \u2502 new \u2502 This configuration sets the allowable timestamp difference \u2502 broker \u2502 long \u2502 [0,...] \u2502 medium \u2502 cluster-wide \u2502 [ABSENT] \u2502 9223372036854775807 \u2502 \u2502\n\u2502 \u2502 \u2502 between the message timestamp and the broker's timestamp. \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 The message timestamp can be later than or equal to the b \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 roker's timestamp, with the maximum allowable difference d \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 etermined by the value set in this configuration. If log.m \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 essage.timestamp.type=CreateTime, the message will be reje \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 cted if the difference in timestamps exceeds this specifie \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 d threshold. This configuration is ignored if log.message. \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502 timestamp.type=LogAppendTime. \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n...\n```\n\nYou can also highlight changes in producer and consumer level configurations, by using the `-c / --config-type` flag.\n",
"bugtrack_url": null,
"license": "MIT",
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