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[skip ci] Check grammar of root-coord docs (#11133) 

Signed-off-by: min.tian <min.tian.cn@gmail.com>
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min.tian 2021-11-03 10:54:23 +08:00 committed by GitHub
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docs/design_docs/root_coordinator_recovery_on_power_failure.md
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@ -24,7 +24,7 @@
6. Take `create_collection` as an example to illustrate the process
- When `create collection` is written to etcd, 2 additional keys are updated, `dd_msg` and `dd_type`
- `dd_msg` is the serialization of the `dd_msg`
- `dd_type` is the message type of `dd_msg`, such as `create_collection`, `create_partition`, `drop_collection,` etc. It's used to deserializes `dd_msg`.
- `dd_type` is the message type of `dd_msg`, such as `create_collection`, `create_partition`, `drop_collection,` etc. It's used to deserialize `dd_msg`.
- Update the meta of `create_collection`, `dd_msg` and `dd_type` at the same time in a transactional manner.
- When `dd_msg` has been sent to `dd msgstream`, delete `dd_msg` and `dd_type` from etcd.
- When the `RC` starts, first check whether there are `dd_msg` and `dd_type` in etcd. If yes, then deserialize `dd_msg` according to `dd_type`, and then send it to the `dd msgstream`. Otherwise, no processing will be done