[skip e2e] Add note for design doc (#13586)

Signed-off-by: yhmo <yihua.mo@zilliz.com>
pull/13596/head
groot 2021-12-17 14:33:59 +08:00 committed by GitHub
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@ -135,6 +135,6 @@ _Notes:_
1. In `Proxy`, all `DDL` requests will be wrapped into `task`, and push the `task` into `DdTaskQueue`.
A background service will read a new `task` from `DdTaskQueue` only when the previous one is finished.
So all the `DDL` requests are executed serially on `Proxy`
So all the `DDL` requests are executed serially on `Proxy`.
2. In `RootCoord`, all `DDL` requests will be wrapped into `reqTask`, but there is no task queue, so the `DDL` requests will be executed in parallel on `RootCoord`.