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Old 12-08-2006, 09:06 AM   #1
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Registered: Dec 2005
Location: Muenchen, Germany
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Cool prevent rsync from copying open files?

Hi there,

how can I find out whether a file is still being written? How can I tell rsync not to copy files which are still being written?

Thanks to some great tutorials around I managed to set up a rsync cron job, backuping files from a very remote machine to my computer. Now, on the remote machine there's a program running which writes data out in files and also, once in a while, creates a new file, closing the old one. I would like to copy only closed files, i.e. files that are not being written into any more. Otherwise I'd copy lots of data many times: As long as the file is still written, and a last time only once the file is closed. That's not what I want since the connection is very slow. Any ideas?

Thank you already in advance!

Old 12-08-2006, 11:36 AM   #2
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Registered: Jan 2001
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rsync is intelligent though. If you copy files once, it should only copy the incremental changes. Check the man page for many options rsync has. Although I don't recall an option to only copy files that are not opened by any process, you could either copy files with a particular timestamp or older or possibly write a script that uses lsof to search for open files and not include such files in the current rsync copy.
Old 12-11-2006, 04:16 AM   #3
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Hi Trickykid,

yes, you're right, how nice! I just tried it out and it works, only copying incremental changes, perfect!

Thanks for the help!




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