ticdc: add more faq#3882
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Signed-off-by: Neil Shen <overvenus@gmail.com>
overvenus
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Jul 3, 2020
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| * message.max.bytes | ||
| * replica.fetch.max.bytes | ||
| * fetch.message.max.bytes | ||
| * socket.request.max.bytes |
Signed-off-by: Neil Shen <overvenus@gmail.com>
Signed-off-by: Neil Shen <overvenus@gmail.com>
Signed-off-by: Neil Shen <overvenus@gmail.com>
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Jul 6, 2020
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amyangfei
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Jul 7, 2020
| cdc cli changefeed query --pd=http://10.0.10.25:2379 --changefeed-id 28c43ffc-2316-4f4f-a70b-d1a7c59ba79f | ||
| ``` | ||
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| 上述命令的输出中 `admin-job-type` 标志这个同步的任务的状态： |
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不推荐用户看这个状态，建议使用最新的 cdc cli changefeed list / cdc cli changefeed query --simple 查看
ref: pingcap/ticdc#721
ps: v4.0.3 引入
Signed-off-by: Neil Shen <overvenus@gmail.com>
amyangfei
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Jul 9, 2020
| [{ | ||
| "id": "4e24dde6-53c1-40b6-badf-63620e4940dc", | ||
| "summary": { | ||
| "state": "normal", |
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可以增加一下对 state 的解释
normal: 正常同步
stopped: 停止同步（手动暂停或出错）
removed: 已删除任务
amyangfei
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Jul 9, 2020
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| * `message.max.bytes`，将 Kafka 的 server.properties 中该参数调大到 33554432 （32 MB）。 | ||
| * `replica.fetch.max.bytes`，将 Kafka 的 server.properties 中该参数调大到 33554432 （32 MB）。 | ||
| * `fetch.message.max.bytes`，适当调大 comsumer.properties 中该参数，确保大于 `message.max.bytes`。 |
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这 3 个值都建议大一点，可以调到 1G (1073741824)
amyangfei
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Jul 9, 2020
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| ## TiCDC 把数据同步到 Kafka 时，能在 TiDB 中控制单条消息大小的上限吗？ | ||
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| 不能，目前 TiCDC 控制了消息大小 4MB |
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4 MB 是单个 key-value 消息的最大大小；实际每次向 kafka broker 发送的批量消息最大是 512MB
Signed-off-by: Neil Shen <overvenus@gmail.com>
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@amyangfei PTAL again |
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@amyangfei,Thanks for your review. However, LGTM is restricted to Reviewers or higher roles.See the corresponding SIG page for more information. Related SIGs: docs(slack). |
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/run-all-tests |
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Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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cherry pick to release-4.0 in PR #3966 |
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Signed-off-by: ti-srebot <ti-srebot@pingcap.com> Co-authored-by: Neil Shen <overvenus@gmail.com>
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What is changed, added or deleted? (Required)
Add more FAQ about TiCDC.
Which TiDB version(s) do your changes apply to? (Required)
What is the related PR or file link(s)?