rsync behavior on copy-on-write filesystems

[Kevin Korb]

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You might find the lsh program in the support dir of the source tree
useful.  It is essentially the same as using ssh localhost but without
the overhead.

On 05/22/13 17:25, Allen Supynuk wrote:
> Sorry for the churn and thanks for the suggestions. When I redid
> my experiments over the network everything worked just as I dreamed
> it would. Changing the first 4K bytes only caused a 4K change in
> the copy. Changing meta-data (time stamp) only caused the time
> stamp to change in the copy.
> 
> This is very nice and I expect it to save 10's of GB per archive
> going forward.
> 
> Kevin was right. --whole-file was the default when source and 
> destination are specified as local paths.
> 
> On 5/22/13, Allen Supynuk <allen.supynuk at gmail.com> wrote:
>> Kevin,
>> 
>> I will try again over a remote connection to see if that makes a 
>> difference. Not expecting -z to day much of anything based on
>> the random data, just wanting to be consistent with the flags in
>> the finished solution.
>> 
>> Chris,
>> 
>> You only get --whole-file if you specify it (or -W).
>> 
>> Paul,
>> 
>> For my first couple of days of testing I dutifully did both 'df
>> -h .' and 'btrfs filesystem df .' until I saw that they give the
>> same answer after you wait for background cleanup. In this case
>> we are only adding files so no background cleanup applies.
>> 
>> On 5/22/13, Paul Slootman <paul+rsync at wurtel.net> wrote:
>>> On Tue 21 May 2013, Allen Supynuk wrote:
>>>> 
>>>> ## 1) Start with an empty filesystem
>>>> 
>>>> $ df -h .
>>> 
>>> Note that you need to be using "btrfs filesystem df ." for
>>> reliable numbers; the normal df does not take into account 
>>> background cleanups etc.
>>> 
>>> 
>>> Paul -- Please use reply-all for most replies to avoid omitting
>>> the mailing list. To unsubscribe or change options: 
>>> https://lists.samba.org/mailman/listinfo/rsync Before posting,
>>> read: http://www.catb.org/~esr/faqs/smart-questions.html
>>> 
>> 
>> 
>> -- Allen.Supynuk at gmail.com
>> 
> 
> 

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	Kevin Korb			Phone:    (407) 252-6853
	Systems Administrator		Internet:
	FutureQuest, Inc.		Kevin at FutureQuest.net  (work)
	Orlando, Florida		kmk at sanitarium.net (personal)
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	PGP public key available on web site.
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