Le 06/10/2010 15:04, Michael Stowe a écrit :
>> Hi,
>>
>> I would like to backup some laptop computers (for my personal needs).
>> For the moment, I automount the shared directories of the Windows 7 PC
>> on my Linux backuppc server. This works fine but the problem is that
>> some backups are not performed when the laptop is shut down. The backups
>> start because the Linux server is running but the mount point is down.
>> I would like to know what are the advantages/drawbacks for laptop pcs of
>> the following policies :
>>
>> * automount of shared directories + rsync (what I do now).
>> * smb + tar
>> * rsyncd
>> * Other ?
>>
>> Thank you.
>>
>> Xuo.
> Well, if the laptop's down, none of these methods will help you back it
> up, obviously, but here's a brief outline of the pros and cons:
>
> * automount of shared directories + rsync (what I do now).
> Probably the least bandwidth-efficient, since rsync has to read every file
> over the mount. Can't handle open files.
> * smb
> Requires the least amount of software on the client. Uses timestamp for
> incrementals, so can miss copied files and renamed directories during
> incrementals. Can't handle open files.
> * automount of shared directories + tar
> All the disadvantages of mounting plus all the disadvantages of tar
> * rsyncd/rsync
> Can be bandwidth efficient and seamless, there are scripts publicly
> available that can handle open files. Within this category, the
> variations of ssh/rsyncd, rsyncd, winexe/rsync have varying degrees of
> speed, ease of deployment, and encryption. I use the winexe/rsync method
> since we have no need of encryption, so we prioritize speed and ease of
> deployment.
Hi,
Thank you for your answer and sorry for the delay in response.
* Point 1 : you say rsync has to read all files over the mount, but
I think it is more or less the same for all methods.
* Point 4 : it seems to be the most widely used but it needs so
executables on all clients. This is a big disadvantage.
* One point you did not mentioned and I considered as important (if
I understand the way backupPC works).
o In case of automounts, the mount point is considered as a
local directory. If the laptop PC is shutdown, then the
directory is considered empty and the backup ends normally.
There is no more backup till the next usual one.
o If backups are done with smb, then, if the laptop is
shutdown, the backup fails and it will be scheduled for the
next time (for ex, one hour later). This is a major
advantage of smb vs automount.
o With rsync/rsyncd, I don't know what the behavior is.
Regards.
Xuo.
> * Other ?
>
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experiences on the web. Be a part of the beta today.
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