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VFS_CROSSRENAME(8)	  System Administration	tools	    VFS_CROSSRENAME(8)

       vfs_crossrename - server	side rename files across filesystem boundaries

       vfs objects = crossrename

       This VFS	module is part of the samba(7) suite.

       The vfs_crossrename VFS module allows server side rename	operations
       even if source and target are on	different physical devices. A "move"
       in Explorer is usually a	rename operation if it is inside of a single
       share or	device.	Usually	such a rename operation	returns
       NT_STATUS_NOT_SAME_DEVICE and the client	has to move the	file by	manual
       copy and	delete operations. If the rename by copy is done by the	server
       this can	be much	more efficient.	vfs_crossrename	tries to do this
       server-side cross-device	rename operation.

       There are however limitations that this module currently	does not

	   The ACLs of files are not preserved,

	   meta	data in	EAs are	not preserved,

	   renames of whole subdirectories cannot be done recursively, in that
	   case	we still return	STATUS_NOT_SAME_DEVICE and let the client
	   decide what to do,

	   rename operations of	huge files can cause hangs on the client
	   because clients expect a rename operation to	return fast.

       This module is stackable.

       crossrename:sizelimit = BYTES
	   server-side cross-device-renames are	only done for files if the
	   filesize is not larger than the defined size	in MiB to prevent
	   timeouts. The default sizelimit is 20 (MiB)

       To add server-side cross-device renames inside of a share for all files
       sized up	to 50MB:

		path = /data/mounts
		vfs objects = crossrename
		crossrename:sizelimit =	50

       This man	page is	part of	version	4.11.11	of the Samba suite.

       The original Samba software and related utilities were created by
       Andrew Tridgell.	Samba is now developed by the Samba Team as an Open
       Source project similar to the way the Linux kernel is developed.

Samba 4.11.11			  07/01/2020		    VFS_CROSSRENAME(8)


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