Hi, I’m having difficulties trying to understand the performance differences between NFS and SMB. I have used rsync (OS X) over SMB (mounted network storage) and using rsync (OS X) over SSH (NFS mounted storage)
>From my test, rsync over SMB builds a file list each time comparing modified source/destination, where as rsync over ssh/nfs is incredibly quicker, pretty much instant. During the test; - when running rsync to the mounted storage on Linux, it identified new/deleted files immediately! - When running rsync over SMB, it builds a complete file list and lists each directory before any copy takes place. To the users perception, building the file list (lets say the user has hundreds/thousands of folders) takes some time to run through each directory. Once the rsync completes the initial copy, on the second rsync, it completes within seconds. As expected, right? The problem occurs when I unmount and remount the SMB share. If I run rsync again it builds the whole file list and begins to run through 'every folder”, even if there is nothing to copy! This is not the same behaviour using rsync via ssh over nfs, it doesn’t appear to show "building file list" and immediately informs the user if files are copying or the completion time. I have tried multiple troubleshooting, even unmounting the the NFS share and clearing the cached memory in Linux with no success. The commands I have played around with are;- Over smb rsync -uvaz --delete /source /destination rsync -aHEXAx -v --delete --progress --stats --timeout=999 /source /destination (tried without —progress and —stats, same behaviour) Over ssh/nfs rsync -nuvaz --delete /source/ r...@nfsserver.domain.co.uk: Thanks, Si The University of Dundee is a registered Scottish Charity, No: SC015096 -- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html