-------- Original Message -------- Subject: Re: [BackupPC-users] Backup backuppc From: Mirco Piccin <[email protected]> To: General list for user discussion, questions and support <[email protected]> Date: Fri Aug 20 2010 16:28:05 GMT+0200 (ora Legale Europa Occidentale) > the point is that a snapshot : > - is very fast, and then you can copy off the machine using netcat or > rsynch, without worries about BackupPC activity. > Believe me, now you are sure that BackupPC is "sleeping" during the > copy, but tomorrow and tomorrow again with one more server/pc to > backup, and another one, and so on..? > - if the logical volume is a removable USB disk partition , you can > simply remove that usb disk and store it everywhere, without > additional copy.
So:
1. I create a snapshot lv of the backuppc source lv on an external
USB device;
2. I unmount the snapshot;
3. I eject the disk.
Provided you can unmount a lv on a removable partition without
deactivating the volume group first (I don't believe this is possible),
I don't understand when the copy from the source to the snapshot takes
place. If the copy happens from the snapshot to the USB device (that is
a traditional partition even with no LVM) then it's more clear to me,
and the advantage I see is with the hard link matter and the fact that
the source lv can change while you copy the "static" data on the snap.
I will study your links this weekend, maybe I'll find some lightning...
Have a nice w-e.
Alessandro
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