Hi there

To begin with, TSM as a product has no issues with fast restores. If the data 
isnt placed correctly, restores might slow up though.

- Did you restore files or files and directories?
- Are you storing directories on tape or in a dedicated diskpool using DIRMC? 
- Considering it was only 117 files, the average sice was 427KB. Are you using 
collocated tape pools, or is there a chance the files was spread across the 
tape?

When a restore takes this amount of time for just a small amount of size/files, 
it usually points towards files / directories being spread across the tape. 
Usually when doing restores of large fileservers (which I asume this is) 
sorting out what needs to be restored on the TSM server-side is what takes 
time, but since you got to "Waiting for files" pretty fast, I'd say you have 
files/directories spread widely across the tape.

Best Regards

Daniel Sparrman


-----"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> skrev: -----


Till: ADSM-L AT VM.MARIST DOT EDU
Från: Niklas Lundström <niklas.lundstrom AT SWEDBANK DOT SE>
Sänt av: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
Datum: 09/07/2010 07:02
Ärende: 50Mb restored in 4.18h....

Hello

I just did a restore of 50Mb and it took 4h 18min
If it had been 50Gb I wouldn't complain

Total number of objects restored:       114
Total number of objects failed:           0
Total number of bytes transferred:   50.99 MB
Data transfer time:                9,426.15 sec
Network data transfer rate:            5.53 KB/sec
Aggregate data transfer rate:          3.36 KB/sec
Elapsed processing time:           04:18:55

The server has a lot of files,  almost 7 million including the copypool. The 
TSM DB is really big, 180Gb and 94% full.
TSM Server 5.5.4.

Does anyone have a clue of why the restore took so long?

It found what volumes to mount fast, but then the client was "Waiting for files 
from the server....."

People here are complaining about TSM and that the restores takes long time
and it's hard to defend it when the restore takes so long...


Med vänlig hälsning
Niklas Lundström


Niklas Lundström
Storage Administrator

Swedbank AB (publ)
105 34  Stockholm
Telefon: +46 (0)8 5859 5164
Mobil: +46 (0)70 24 76 345

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