Here is a test case, step by step, copy/pasted from my terminal, which
shows this issue, and also shows files and folder sizes. It shows at
the end it is not an accounting problem. I can send both the snapshots
if someone needs to reproduce this test.
I'm using duplicity 0.4.3.RC8, but the same problem is present in 0.4.2.
address@hidden ~]# cd /var/tmp/testcase1
address@hidden testcase1]# ll -h
total 3.3G
-rw------- 3 root root 1.7G Jun 20 08:41 snapshot1
-rw------- 2 root root 1.7G Jun 20 16:32 snapshot2
address@hidden testcase1]# rdiff signature snapshot1 snapshot1.sig
address@hidden testcase1]# rdiff delta snapshot1.sig snapshot2
snapshot2.delta
address@hidden testcase1]# ll -h
total 3.4G
-rw------- 3 root root 1.7G Jun 20 08:41 snapshot1
-rw-r--r-- 1 root root 9.9M Jun 28 08:56 snapshot1.sig
-rw------- 2 root root 1.7G Jun 20 16:32 snapshot2
-rw-r--r-- 1 root root 13M Jun 28 08:58 snapshot2.delta
address@hidden testcase1]# mkdir /var/tmp/testcase1_source
address@hidden testcase1]# mkdir /var/tmp/testcase1_destination
address@hidden testcase1]# cp snapshot1 /var/tmp/testcase1_source/snapshot
address@hidden testcase1]# duplicity /var/tmp/testcase1_source
file:///var/tmp/testcase1_destination
GnuPG passphrase:
Retype to confirm:
No signatures found, switching to full backup.
--------------[ Backup Statistics ]--------------
StartTime 1183032377.10 (Thu Jun 28 09:06:17 2007)
EndTime 1183033364.78 (Thu Jun 28 09:22:44 2007)
ElapsedTime 987.68 (16 minutes 27.68 seconds)
SourceFiles 3
SourceFileSize 1870516224 (1.74 GB)
NewFiles 3
NewFileSize 1870516224 (1.74 GB)
DeletedFiles 0
ChangedFiles 0
ChangedFileSize 0 (0 bytes)
ChangedDeltaSize 0 (0 bytes)
DeltaEntries 3
RawDeltaSize 9087984 (8.67 MB)
TotalDestinationSizeChange 392502939 (374 MB)
Errors 0
-------------------------------------------------
address@hidden testcase1]# du --max-depth 1 -h
/var/tmp/testcase1_destination
376M /var/tmp/testcase1_destination
address@hidden testcase1]# cp snapshot2 /var/tmp/testcase1_source/snapshot
address@hidden testcase1]# duplicity /var/tmp/testcase1_source
file:///var/tmp/testcase1_destination
GnuPG passphrase:
Retype to confirm:
--------------[ Backup Statistics ]--------------
StartTime 1183033523.75 (Thu Jun 28 09:25:23 2007)
EndTime 1183033726.08 (Thu Jun 28 09:28:46 2007)
ElapsedTime 202.33 (3 minutes 22.33 seconds)
SourceFiles 3
SourceFileSize 1870516224 (1.74 GB)
NewFiles 1
NewFileSize 4096 (4.00 KB)
DeletedFiles 0
ChangedFiles 1
ChangedFileSize 1768112128 (1.65 GB)
ChangedDeltaSize 0 (0 bytes)
DeltaEntries 2
RawDeltaSize 5174784 (4.94 MB)
TotalDestinationSizeChange 113601574 (108 MB)
Errors 0
-------------------------------------------------
address@hidden testcase1]# du --max-depth 1 -h
/var/tmp/testcase1_destination
485M /var/tmp/testcase1_destination
address@hidden testcase1]#
As you can see, rdiff delta size is 13MB, while
/var/tmp/testcase1_destination increased from 376MB to 485MB (109MB)
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