Yes v4 is more complex. Each new backup is filled (copied forward)
which is kinda like a full backup - but a moving full backup, as
BackupPC calculates the diff from the prior backups. If 135 is leaner
(smaller) than 134 then BackupPC has already figured out what is going
on. By creating a semi-permanent filled backup through a Full backup
for #136, then using BackupPC_deleteBackup, BackupPC should properly
calculate what needs to remain within the pool when removing #134 (files
associated with an attrib remain). Orphaned files within the pool
should be removed over time.
So if the pool is filled with files only associated with backup #134 and
not tied to other backups you should be fine. Nightly maintenance
should remove them.
Thought experiment (I think this is where you are going):
If #134 is treated like a new, original backup (as if all previous
backups didn't exist) and #135 is based off that backup we have an
interesting question to think about. Would BackupPC leave many of the
files behind with Filled #136? If you remove #134 via
BackupPC_deleteBackup will many files remain because they are tied to
#135? My thought is yes. But only if BackupPC thinks #134 is an
original backup.
The answer then would be to remove #134 and #135. Yes you lose two days
of backups but you regain sanity and backup space. This may be your
best solution however unhappy it may make you.
Cheers!
mph
On 2017-05-21 20:49, Alexey Safonov wrote:
> but if i do full backup for example 135 it will copy existing 134 and then do
> diff into 134
> that's new in V4
> so there are no way to delete data that was backup by mistake and preserver
> history.
>
> V4 is good one but more complex according to V3.
>
> and now i have 500GB used on /mnt/backup (and regular was about 100-1500GB :)
>
> Alex
>
> On 22 May 2017 at 11:45, Michael Huntley <mich...@huntley.net> wrote:
>
> Ah, ok. I would run a Full backup (now considered "Filled"). That's the
> safest move prior to removing 134. The most recent backup is always Filled,
> but were talking about important data so I don't see a problem with doing on
> more Full (Filled) backup to ensure safety.
>
> Craig - anything wrong with my logic here?
>
> Cheers,
>
> mph
>
> On 2017-05-21 20:29, Alexey Safonov wrote:
> Thanks for quick reply.
>
> but as i understan in V4 full backup in last folder. My question is related
> to bug in 4.1.2 (that is now fixed). But because of that bug i have regular
> backup 133 , abnormal backup 134 (it's huge in size) and again normal backup
> 135
> i need to really cleanup my NFS storage. So if i delete 134 it will not help?
> is it correct?
>
> Alex
>
> On 22 May 2017 at 11:26, Michael Huntley <mich...@huntley.net> wrote:
>
> I would strongly suggest the use of BackupPC_backupDelete -n 134 to properly
> remove the backup. It should be fine to remove. You'll lose whatever
> changes occurred between 133 and 134.
>
> Cheers,
>
> mph
>
> On 2017-05-21 19:36, Alexey Safonov wrote:
> Hi, All
>
> I'm usinv V4 backuppc. is it safe to delete one intermediate backup? for
> example we have in /pc/litspc123 dirs 133 135 and 135
>
> is it safe to delete backup 134 directly from nfs?
>
> Alex
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