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Old 20th January 2009
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paul-lkw paul-lkw is offline
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Default rsync problem

Hi all:
Recently I used rsync to backup my data via NFS, I use the options as below;

rsync -arclpog --delete --ignore-errors /source_path /NFS_remote_path

then in first time I backup all data for about 5 hours.
In theory it should be shorter in thereafter because rsync will just check the time stamp for update but finally I still get every time 5 hours to backup.
Do I used wrong option with this result?
Thx for all your helps.

^_^
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Old 20th January 2009
ddekok ddekok is offline
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It seems that rsync deletes before the sync by default. You may want to try --delete-after rather than --delete.
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Old 20th January 2009
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Read 'man rsync' about the implications of using checksumming (-c). Run your current rsync run with -v added to see where the delay is. My guess is the checksum generation on both ends.
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Old 21st January 2009
J65nko J65nko is offline
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Play with the options, let rsync show you an itemized list (-i) of what it would do in a so-called dry-run (-n).
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Old 22nd January 2009
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I want to make clear the concept, does rsync will compare whole file or just something like "timestamp" ?
U_U
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Old 22nd January 2009
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See http://en.wikipedia.org/wiki/Rsync#Algorithm
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Old 23rd January 2009
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Ths a lot.
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