Writing offset is not in sequential order

[Shuran Zhang]

Hi,
When I tries to write some large data, I have noticed that sometimes the writing offset is not in sequential order. I know that libfuse has async reading feature. Is writing also async with FUSE? And is there a similar way for us to disable the async writing and make the writing offset in order each time? I am writing toward cloud storage so out of order writing will cause inconsistency for my case.

Thank you!

[Kurt Jensen]

You may need to disable writeback caching in the mount config to ensure writes arrive in sequential order.

For example:

fuse/samples/mount_memfs/mount.go

Lines 54 to 57 in c419787

 cfg := &fuse.MountConfig{ 
 	// Disable writeback caching so that pid is always available in OpContext 
 	DisableWritebackCaching: true, 
 } 

[Shuran Zhang]

Thanks for the advice!