Question on folder sync with "directory name translation"

Mon Jun 8 16:14:30 MDT 2015

OK , but then the solution with symlinks is equivalent, just with the right
options for rsync.

Make the link.
Sync + exclude.
Remove the link.

Don't have to live with the folder on the source.

*_______________Gionata Boccalini*

2015-06-08 22:49 GMT+02:00 Michael Johnson - MJ <mj at revmj.com>:

> Oh, actually, I just thought of a couple other another options that don't
> require any multiplexing or ssh keys, but it would require that your source
> machine is linux.
>
> The first option would be:
>
> mkdir /A/FolderB
> mount --bind /A/FolderA /A/FolderB
>
> Then just exclude /A/FolderA from the rsync and you are done.  This does
> mean that you have to be ok with /A/FolderB existing on the source.
>
>
> The second option would be to use somthing like aufs or overlayfs to
> create a new mountpoint that contains everything you want and perhaps with
> a little bit of mount --bind thrown in.
>
>
> I just saw your response, and and what you describe makes sense.  Sounds
> like the mount bind option + exclude might be the most elegant option for
> this case.  Just make sure to add the bind mount into your fstab so it
> comes back after a reboot.  :)
>
> On Mon, Jun 8, 2015 at 1:18 PM, Michael Johnson - MJ <mj at revmj.com> wrote:
>
>> Thought I would chime in here.  To the best of my knowledge what you are
>> trying to do cannot be done in a single run.  I supposed --fuzzy might work
>> for you but I've never used that option and it sounds scary to me.  Perhaps
>> if I spent some time and learned the methodology it uses I would be less
>> concerned.  If a feature like this were to be added, it seems like it would
>> make sense to add it as a new "filter" type.
>>
>> But mainly you've piqued my curiosity.  The requirement that it be able
>> to happen in a single rsync run seems very odd.  Is this just a desire, or
>> is there really something that bad that would happen if you did one pass
>> syncing A to B excluding FolderA and FolderB and then a second pass syncing
>> FolderA to FolderB?
>>
>> The most likely scenario I imagine is that you are running this by hand
>> and manually enter the SSH password.  Given the process take a long time,
>> you don't want to enter the password again mid stream.  If this is the
>> case, you could set up SSH keys to allow this to happen without a manually
>> typed password.  You can find how to set that up here:
>>
>> http://www.chainsawonatireswing.com/2012/01/15/ssh-into-your-synology-diskstation-with-ssh-keys/
>>
>> If you don't want to do ssh keys w/o a password, you could use ssh agent
>> with keys.
>>
>> Finally you could also utilize ssh multiplexing (it looks like that
>> should work with the synology nass).  You can find information about this
>> option here:
>> http://en.wikibooks.org/wiki/OpenSSH/Cookbook/Multiplexing
>>
>> The other (very unlikely) scenario I can imagine is that there is
>> something that prevents you from logging in more than once every X
>> hours/days like a time lock safe.  multiplexing would help here as well.
>> But this scenario seems unlikely, it was probably silly to even mention it.
>>
>> If there is another case I have not considered I would be very interested
>> to know where this requirement comes from.
>>
>> Thanks!  Hope there was something useful for you in all this.  :)
>>
>> On Sun, Jun 7, 2015 at 9:38 AM, Gionata Boccalini <
>> gionata.boccalini at gmail.com> wrote:
>>
>>> Hello everyone,
>>>
>>> I'm new to this mailing list but I have been using rsync for some years
>>> up to now.
>>> I'm trying to synchronize two directory trees, but I want a special
>>> behavior that I didn't find on the net nor in the manual (or maybe there is
>>> a combination of options to get what I want but I couldn't find it).
>>>
>>> Tree A is like:
>>>
>>> A
>>>   *
>>>   *
>>>    FolderA
>>>   *
>>>   *
>>>
>>> And tree B (on a remote filesystem) is like:
>>>
>>> B
>>>   *
>>>   *
>>>   *
>>>    FolderB
>>>   *
>>>   *
>>>
>>>
>>> I have to synchronize everything in one rsync run, like
>>> rysnc  -arv  A/  B/
>>>
>>> but I want FolderA to be synchronized with FolderB.
>>> They must contain the same files but have a different name! I want
>>> something like a "directory name translation" in the rsync run...
>>> Is it possible? Do you see any another way of doing this? (A part of
>>> using two rsync runs....)
>>> Please let me know if I didn't explain the problem correctly or you need
>>> further information.
>>> Thank you for your attention and time.
>>> Best regards.
>>>
>>>
>>> *_______________Gionata Boccalini*
>>>
>>> --
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>>
>>
>>
>> --
>> Michael Johnson - MJ
>>
>
>
>
> --
> Michael Johnson - MJ
>
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