[FSL-TRACES] Same file path with different inode numbers

Gala Yadgar gala at cs.technion.ac.il
Wed Jul 5 09:28:40 EDT 2017


Hi,

 

While processing the traces, we encountered many cases in which two or more
entries in a snapshot have the same path, but different inode numbers. Many
times these "duplicates" also have a different list of chunks altogether,
and different modification times. 

 

We thought they might be collisions in the anonymized hashes of the file
path, but this happens too often. For example, in
fslhomes-user021-2011-09-20.8kb there are 12K file paths that have such
"duplicates" (one example from this FS is appended below, but we saw the
same phenomenon in other FSs as well).

 

We're wondering whether these are files that coexisted in the directory when
the snapshot was taken. Could you please explain how these "duplicate"
entries were generated, or what they represent?

 

Thanks in advance,

Gala

 

File path:
/d9b50a6f54d5a1f8/e15ab98b8f907f6c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a5
61f5da8a6/208eeab0c5a00a44/12fd3e87b2f62dc8/14aa703d470cb84a/75645f0a435607a
2.png

File size: 137KB

512B file system blocks allocated: 288

Chunks: 19

UID: 3691

GID: 500

Permission bits: 100644

Access time: Tue Sep 20 07:03:14 2011

Modification time: Thu Mar 31 19:43:06 2005

Change time: Mon Jul 11 18:32:32 2011

Hardlinks: 1

Device ID: 39

Inode Num: 4817117

.

Whole File Hash: d48ebc2b6644

 

File path:
/d9b50a6f54d5a1f8/e15ab98b8f907f6c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a5
61f5da8a6/208eeab0c5a00a44/12fd3e87b2f62dc8/14aa703d470cb84a/75645f0a435607a
2.png

File size: 55KB

512B file system blocks allocated: 120

Chunks: 9

UID: 3691

GID: 500

Permission bits: 100644

Access time: Tue Sep 20 07:03:14 2011

Modification time: Thu Mar 31 19:13:26 2005

Change time: Mon Jul 11 18:32:32 2011

Hardlinks: 1

Device ID: 39

Inode Num: 4817109

.

Whole File Hash: fece1ce0429c

 

 

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