wu-sheng commented on a change in pull request #7634:
URL: https://github.com/apache/skywalking/pull/7634#discussion_r702418051



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File path: docs/en/setup/backend/backend-storage.md
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@@ -34,23 +34,18 @@ storage:
 
 ## OpenSearch
 
-OpenSearch storage shares the same configurations as ElasticSearch 7.
-In order to activate ElasticSearch 7 as storage, set storage provider to 
**elasticsearch7**.
-Please download the `apache-skywalking-bin-es7.tar.gz` if you want to use 
OpenSearch as storage.
+OpenSearch storage shares the same configurations as ElasticSearch.
+In order to activate OpenSearch as storage, set storage provider to 
**elasticsearch**.
 
 ## ElasticSearch
 
 **NOTE:** Elastic announced through their blog that Elasticsearch will be 
moving over to a Server Side Public
 License (SSPL), which is incompatible with Apache License 2.0. This license 
change is effective from Elasticsearch
 version 7.11. So please choose the suitable ElasticSearch version according to 
your usage.
 
-- In order to activate ElasticSearch 6 as storage, set storage provider to 
**elasticsearch**
-- In order to activate ElasticSearch 7 as storage, set storage provider to 
**elasticsearch7**
-
-**Required ElasticSearch 6.3.2 or higher. HTTP RestHighLevelClient is used to 
connect server.**
-
-- For ElasticSearch 6.3.2 ~ 7.0.0 (excluded), please download 
`apache-skywalking-bin.tar.gz`.
-- For ElasticSearch 7.0.0 ~ 8.0.0 (excluded), please download 
`apache-skywalking-bin-es7.tar.gz`.
+Since 8.8.0, SkyWalking rebuilds the ElasticSearch client on top of 
ElasticSearch REST API and automatically picks up
+correct request formats according to the server side version, hence you don't 
need to download different binaries
+and don't need to configure different storage selector for different 
ElasticSearch server side version anymore.

Review comment:
       I think we still need to indicate the supported-versions range.




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