PBS no deplucation?

C

Cleaner

New Member
Feb 5, 2024
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I have one PBS server, with 2 datastores, that are used with 2 different PBS clusters.
The PBS server is a VM on a Synology.

The Datastores are located on 2 different Synology NAS with NFS.

My first datastore works fine. There is a nice deduplication active. I can see a differance between Original Data usage and On-Disk usage.

Code: 
Datastore:            Daily-nas-xxxxx
Task ID:              UPID:pbs:000002AC:00001408:000000A1:67C23FF0:garbage_collection:Daily\x2dnas\x2dxxxx:root@pam:
Index file count:     290

Removed garbage:      13.088 GiB
Removed chunks:       7685
Removed bad chunks:   0

Leftover bad chunks:  0
Pending removals:     3.616 GiB (in 2244 chunks)

Original Data usage:  3.316 TiB
On-Disk usage:        207.629 GiB (6.12%)
On-Disk chunks:       106752

Deduplication Factor: 16.35

Garbage collection successful.

My second datastore, it still has a Deduplication of one, what I would not expect.

Code: 
Datastore:            Backup-yyyyy
Task ID:              UPID:pbs:000002AC:00001408:000000A0:67C23FF0:garbage_collection:Backup\x2dyyyyyroot@pam:
Index file count:     77

Removed garbage:      0 B
Removed chunks:       0
Removed bad chunks:   0

Leftover bad chunks:  0
Pending removals:     20.157 GiB (in 19661 chunks)

Original Data usage:  530.85 GiB
On-Disk usage:        0 B (0.00%)
On-Disk chunks:       0

Deduplication Factor: 1.00

Garbage collection successful.

I'm a little lost on this, could someone help me with some troubleshooting guide? As I can see, both datastores are setup in the sameway (i think) with my knowledge.
 
something is very wrong with your second datastore - it shows it would want to remove all chunks.. please verify that it correctly supports updating timestamps (for example, run "stat /path/to/chunk; touch /path/to/chunk; stat /path/to/chunk" with the path replaced with an actual chunk path in /path/to/datastore/.chunks/..../............)
 
Cleaner said:
I have one PBS server, with 2 datastores, that are used with 2 different PBS clusters.
The PBS server is a VM on a Synology.

The Datastores are located on 2 different Synology NAS with NFS.

My first datastore works fine. There is a nice deduplication active. I can see a differance between Original Data usage and On-Disk usage.

Code: 
Datastore:            Daily-nas-xxxxx
Task ID:              UPID:pbs:000002AC:00001408:000000A1:67C23FF0:garbage_collection:Daily\x2dnas\x2dxxxx:root@pam:
Index file count:     290

Removed garbage:      13.088 GiB
Removed chunks:       7685
Removed bad chunks:   0

Leftover bad chunks:  0
Pending removals:     3.616 GiB (in 2244 chunks)

Original Data usage:  3.316 TiB
On-Disk usage:        207.629 GiB (6.12%)
On-Disk chunks:       106752

Deduplication Factor: 16.35

Garbage collection successful.

My second datastore, it still has a Deduplication of one, what I would not expect.

Code: 
Datastore:            Backup-yyyyy
Task ID:              UPID:pbs:000002AC:00001408:000000A0:67C23FF0:garbage_collection:Backup\x2dyyyyyroot@pam:
Index file count:     77

Removed garbage:      0 B
Removed chunks:       0
Removed bad chunks:   0

Leftover bad chunks:  0
Pending removals:     20.157 GiB (in 19661 chunks)

Original Data usage:  530.85 GiB
On-Disk usage:        0 B (0.00%)
On-Disk chunks:       0

Deduplication Factor: 1.00

Garbage collection successful.

I'm a little lost on this, could someone help me with some troubleshooting guide? As I can see, both datastores are setup in the sameway (i think) with my knowledge.
Click to expand...
Hi,
in addition to the checks @fabian asked, please give some more specifics on the Synology NAS which does not seem to work, e.g. software versions, NFS version, ecc. Thanks!
 
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