Question on folder sync with "directory name translation"

Wed Jun 10 14:08:48 MDT 2015

Yeah, I don't have other symlink.
But I'm thinking of changing my folder structure to reflect the data I
really need on the NAS. So, as a side effect, the special rsync is not
needed any more :)
Anyway, thanks for the answers!
Bye

*_______________Gionata Boccalini*

2015-06-09 13:25 GMT+02:00 Michael Johnson - MJ <mj at revmj.com>:

> Should be as long as you don't have other symlinks in the tree.
>
> On Mon, Jun 8, 2015, 15:14 Gionata Boccalini <gionata.boccalini at gmail.com>
> wrote:
>
>> 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*
>>>>>
>>>>> --
>>>>> Please use reply-all for most replies to avoid omitting the mailing
>>>>> list.
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>>>>> Before posting, read:
>>>>> http://www.catb.org/~esr/faqs/smart-questions.html
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Michael Johnson - MJ
>>>>
>>>
>>>
>>>
>>> --
>>> Michael Johnson - MJ
>>>
>>
>>
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