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[skip ci]Change etcd to lowercase (#9813) 

Signed-off-by: Weida Zhu <weida.zhu@zilliz.com>
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zwd1208 2021-10-13 19:20:33 +08:00 committed by GitHub
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docs/design_docs/index_design.md
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@ -13,13 +13,13 @@ The following figure shows the design of the indexcoord component:
![indexcoord](graphs/indexcoord_design.png)
## 8.1 Use ETCD as a reliable service
## 8.1 Use etcd as a reliable service
Based on ETCD service discovery, IndexCoord components, like other Milvus components, rely on ETCD to implement
service discovery. IndexCoord relies on the lease mechanism of ETCD to sense the online and offline news of IndexNode.
Based on etcd service discovery, IndexCoord components, like other Milvus components, rely on etcd to implement
service discovery. IndexCoord relies on the lease mechanism of etcd to sense the online and offline news of IndexNode.
In addition to being used for service discovery, Milvus also uses ETCD as a reliable meta storage, and writes all
persistent status information to ETCD. The purpose is to restore a certain Milvus component to its original
In addition to being used for service discovery, Milvus also uses etcd as a reliable meta storage, and writes all
persistent status information to etcd. The purpose is to restore a certain Milvus component to its original
state after power off and restart.
## 8.2 Receive requests about index from RootCoordinate