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Top Forums Shell Programming and Scripting Move folder once it is "ready" Post 302903066 by alister on Friday 23rd of May 2014 08:20:45 PM
Old 05-23-2014
Polling the folder and hoping that everything is done is asking for trouble. If you actually care about not copying over a half-written file, you need an atomic step.

First of all, the directory that you monitor and the directory which is the landing place for the transfers should not be the same. Secondly, they should lie on the same filesystem. Thridly, when a file arrives on the monitored directory (given the conditions above, it would be a POSIX atomic rename(2) operation), that file is always complete and any counts can be considred completed.

Regards,
Alister
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BTRFSCTL(8)						      System Manager's Manual						       BTRFSCTL(8)

NAME
btrfsctl - control a btrfs filesystem SYNOPSIS
btrfsctl [ -d file|directory ] [ -s snapshot-name directory ] [ -S subvolume-name directory ] [ -r [+-]size ] [ -A device ] [ -a ] [ -c ] DESCRIPTION
btrfsctl is used to control the filesystem and the files and directories stored. It is the tool to create a new snapshot for the filesys- tem. OPTIONS
-d file|directory Defragment a file or a directory. If the argument is a directory, the entire b-tree under the directory is defragged. -s snapshot-name directory Creates a new snapshot of the directory specified. -S subvolume-name directory Creates a new subvolume. -r [+|-]size Resizes the filesystem with the size specified. If the value is preceded with a signed symbol, the filesystem is resized with respect to the current filesystem size. size can be suffixed by k,m or g to represent kilobytes, megabytes, or gigabytes respec- tively. -A device Scans the device for btrfs filesystem. -a Scans all devices present in the system for btrfs filesystem. -c Forces a filesystem sync. AVAILABILITY
btrfsctl is part of btrfs-progs. Btrfs is currently under heavy development, and not suitable for any uses other than benchmarking and review. Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for further details. SEE ALSO
mkfs.btrfs(8) BTRFSCTL(8)
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