dlmarion commented on issue #6046:
URL: https://github.com/apache/accumulo/issues/6046#issuecomment-3726051833

   > This violates Accumulo's durability guarantees when using the default SYNC 
durability setting.
   
   I think there is a misunderstanding of the durability guarantee. There was a 
recent change and related discussion revolving around durability at 
https://github.com/apache/accumulo/pull/5988. Accumulo is currently limited to 
using Hadoop Compatible File Systems. The FileSystem that is being used (and 
maybe the options within the FileSystem) will dictate whether or not `sync` 
actually works.
   
   As we have discussed the differences between RawLocalFileSystem and 
LocalFileSystem, it's likely the case that other FileSystem implementations 
don't support `flush` or `sync`. I'm pretty sure that the `S3` filesystem do 
not support `sync`. Additionally, even when using the DistributedFileSystem 
(HDFS) implementation, erasure coded files do not support `sync` either.


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