steveloughran commented on PR #7882:
URL: https://github.com/apache/hadoop/pull/7882#issuecomment-3428880917

   @ahmarsuhail I think Apache Ozone is the one.
   
   I just added an `etag` command to cloudstore to print this stuff out and 
experimented with various stores: 
https://github.com/steveloughran/cloudstore/blob/main/src/main/site/etag.md
   
   dell ECS and Google both supply etags. We don't retrieve them for directory 
markers anyway, which isn't an issue
   
   * I've updated the third-party docs to cover etags in more detail, and say 
"switch to classic and disable version checking"
   * I do think the cache needs to handle null/empty string tags, somehow. 
Certainly by not caching metadata.


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