Hi Robin,
- disk fragmentation coupled with minimum file size allocation issues (?) ie
lots of the same large file updated in place might lead to this scenario, I
think?
- can you confirm trash is empty? is the trash cleanup daemon getting stuck
and therefore nothing getting cleaned up?
- is nightly cleanup showing that it actually cleaned stuff up? (I have
Nightly cleanup removed 31159 files of size 88.77GB (around 9/17 15:37) or
similiar on status)
- how many full backups / incremental backups are listed on your host
summary page ?
My pool is around 630GB and 3843035 files (so 1/5th the size and only half
the number of files), but DF shows it to be 654GB on disk. I put the
discrepancy down to the number of directories in my PC tree - directories don't
hardlink, only files do. The list of files in a directory has to be stored
somewhere, and each directory has a minimum allocation size on disk.
//chris
- Original Message -
From: Robin Lee Powell rlpow...@digitalkingdom.org
To: BackupPC Users backuppc-users@lists.sourceforge.net
Sent: Friday, 17 September, 2010 1:07:25 AM
Subject: [BackupPC-users] Surprising disk usage, *not* a link problem (I don't
think)
I have a fairly large (171 hosts) backup environment that seems to
be using rather more disk than it should.
GUI says: Pool is 3055.59GB comprising 7361233 files and 4369
directories (as of 9/16 01:33),
df says:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/local-backups 4.0T 3.8T 270G 94% /backups
which is a pretty significant gap. I've never moved anything
around, so it shouldn't be a linking problem.
The trash is empty.
Running du -h --exclude='[0-9]*' --exclude=new in the pc
directory, which *should* ignore only the directories that link to
the pool, gives 2.4G .
Running a proper du of the whole tree would take A While, and I'm
not sure my RAM could survive the link checking along with all the
other stuff backuppc is doing.
Any ideas as to what's going on here?
Maybe relevant:
$Conf{BackupPCNightlyPeriod} = 8;
But that still seems excessive? I've run the nightly manually a few
times, as sudo -u backuppc /usr/local/bin/BackupPC_nightly 0 255
(is that the correct syntax for doing that?) and it's taken well
over 24 hours, so splitting it up seems like a probably good idea?
-Robin
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