Understood, the annoying part of NFS is that some operation can not be interrupted when the network is not healthy, and we have no way to kill it.

We have put lots of effort to make the operations interruptible when either meta or object store is slow or down. There are a few cases that the `close` can't be interrupted, we can still abort the FUSE connection or kill the JuiceFS process, then all the operation are canceled.

In general, JuiceFS is built on FUSE, so we can have more control on it.