issue_comments: 806741704

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https://github.com/pydata/xarray/issues/2857#issuecomment-806741704 https://api.github.com/repos/pydata/xarray/issues/2857 806741704 MDEyOklzc3VlQ29tbWVudDgwNjc0MTcwNA== 5821660 2021-03-25T13:27:43Z 2021-03-25T13:27:43Z MEMBER

@aldanor Thanks, that's what I expected (that the new version doesn't change the behaviour you are showing).

I think your assessment of the situation is correct. It looks like, to_netcdf is re-reading the whole file when in append-mode. Or better said, the underlying machinery re-reads the complete file. Would it be possible to use engine=netcdf4 just to see if this isn't affected? 

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