For mount sftp,why right click on exe file is so slow until it freezes

[Ole (Ole Frost)]

@ncw

Avoiding truncate seems to have fixed the problem.

Confirmed now only delay on the second open

The negative effect can often be reduced by also adding something like: --vfs-cache-max-age=7d --vfs-cache-max-size=10G

Perhaps we should add little mount quick start in the beginning of the mount doc to share a good all-round setups for Windows, Mac and Other (Linux). This is my current suggestion for a simple all-round Windows mount with 10GB free for caching:

rclone mount --network-mode --buffer-size=0 --vfs-cache-mode=full --vfs-cache-max-age=7d --vfs-cache-max-size=10G

@ncw

If you disable Windows Defender does it fix it also?

Yes, but not recommended.

@ncw

Is there a way to disable Windows Defender on the VFS cache directory only? If so that would be a useful speedup for the docs.

That is possible, but again not recommended. Most wouldn't understand the risks/consequences nor how to mitigate them. It would therefore easily make the rclone cache a great place to hide malware and thereby increase the risk of rclone being considered malware too.

@ncw

I think this is because they didn't write to the file. The new program has a truncate call and that is enough to trigger the behaviour.

Well spotted!

Perhaps we can improve responsiveness by doing an open/close immediately after the first close - or something along these lines. Then it will often not be noticeable. That may well be easier said that done.

I naively tried a RDWR open/close immediately after the truncate and that was instant, but it didn't have the desired effect - perhaps Defender is sniffing the file header to see it is an executable.