| 1 | '\" t
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| 2 | .\" Title: vfs_crossrename
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| 3 | .\" Author: [see the "AUTHOR" section]
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| 4 | .\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
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| 5 | .\" Date: 10/25/2016
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| 6 | .\" Manual: System Administration tools
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| 7 | .\" Source: Samba 4.4
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| 8 | .\" Language: English
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| 9 | .\"
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| 10 | .TH "VFS_CROSSRENAME" "8" "10/25/2016" "Samba 4\&.4" "System Administration tools"
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| 11 | .\" -----------------------------------------------------------------
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| 12 | .\" * Define some portability stuff
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| 13 | .\" -----------------------------------------------------------------
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| 14 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 15 | .\" http://bugs.debian.org/507673
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| 16 | .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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| 17 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 18 | .ie \n(.g .ds Aq \(aq
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| 19 | .el .ds Aq '
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| 20 | .\" -----------------------------------------------------------------
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| 21 | .\" * set default formatting
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| 22 | .\" -----------------------------------------------------------------
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| 23 | .\" disable hyphenation
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| 24 | .nh
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| 25 | .\" disable justification (adjust text to left margin only)
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| 26 | .ad l
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| 27 | .\" -----------------------------------------------------------------
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| 28 | .\" * MAIN CONTENT STARTS HERE *
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| 29 | .\" -----------------------------------------------------------------
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| 30 | .SH "NAME"
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| 31 | vfs_crossrename \- server side rename files across filesystem boundaries
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| 32 | .SH "SYNOPSIS"
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| 33 | .HP \w'\ 'u
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| 34 | vfs objects = crossrename
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| 35 | .SH "DESCRIPTION"
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| 36 | .PP
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| 37 | This VFS module is part of the
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| 38 | \fBsamba\fR(7)
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| 39 | suite\&.
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| 40 | .PP
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| 41 | The
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| 42 | vfs_crossrename
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| 43 | 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\&.
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| 44 | .PP
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| 45 | There are however limitations that this module currently does not solve:
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| 46 | .PP
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| 47 | .RS 4
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| 48 | .PP
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| 49 | The ACLs of files are not preserved,
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| 50 | .RE
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| 51 | .PP
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| 52 | .RS 4
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| 53 | .PP
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| 54 | meta data in EAs are not preserved,
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| 55 | .RE
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| 56 | .PP
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| 57 | .RS 4
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| 58 | .PP
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| 59 | 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,
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| 60 | .RE
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| 61 | .PP
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| 62 | .RS 4
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| 63 | .PP
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| 64 | rename operations of huge files can cause hangs on the client because clients expect a rename operation to return fast\&.
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| 65 | .RE
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| 66 | .PP
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| 67 | This module is stackable\&.
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| 68 | .SH "OPTIONS"
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| 69 | .PP
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| 70 | crossrename:sizelimit = BYTES
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| 71 | .RS 4
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| 72 | 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)
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| 73 | .RE
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| 74 | .SH "EXAMPLES"
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| 75 | .PP
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| 76 | To add server\-side cross\-device renames inside of a share for all files sized up to 50MB:
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| 77 | .sp
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| 78 | .if n \{\
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| 79 | .RS 4
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| 80 | .\}
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| 81 | .nf
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| 82 | \fI[testshare]\fR
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| 83 | \m[blue]\fBpath = /data/mounts\fR\m[]
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| 84 | \m[blue]\fBvfs objects = crossrename\fR\m[]
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| 85 | \m[blue]\fBcrossrename:sizelimit = 50\fR\m[]
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| 86 | .fi
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| 87 | .if n \{\
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| 88 | .RE
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| 89 | .\}
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| 90 | .SH "VERSION"
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| 91 | .PP
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| 92 | This man page is correct for version 4\&.0\&.0 of the Samba suite\&.
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| 93 | .SH "AUTHOR"
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| 94 | .PP
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| 95 | 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\&.
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