On Fri, Jun 6, 2008 at 8:57 AM, Tobias Bartel <tbartel AT eteleon DOT de> wrote:
> Hallo,
>
> i added 50GB for spooling
>>   Maximum Job Spool Size = 53687091200
>
> although a bit faster my last test run still did not come close to the speeds
> mentioned by others:
>>   JobId:                  38
>>   Job:                    Emu-Full-Tape.2008-06-05_20.51.22
>>   Backup Level:           Full
>>   Client:                 "Emu" i486-pc-linux-gnu,debian,4.0
>>   FileSet:                "Emu-Fileset" 2008-05-31 22:00:02
>>   Pool:                   "Full-Pool-Tape"
>>   Storage:                "Tape"
>>   Scheduled time:         05-Jun-2008 20:51:18
>>   Start time:             05-Jun-2008 20:51:26
>>   End time:               06-Jun-2008 06:50:53
>>   Elapsed time:           9 hours 59 mins 27 secs
>>   Priority:               10
>>   FD Files Written:       704,778
>>   SD Files Written:       0
>>   FD Bytes Written:       144,018,690,668 (144.0 GB)
>>   SD Bytes Written:       0 (0 B)
>>   Rate:                   4004,2 KB/s
>>   Software Compression:   27,9 %
>>   Volume name(s):         Tapes-0008
>>   Volume Session Id:      7
>>   Volume Session Time:    1212418063
>>   Last Volume Bytes:      143,156,270,886 (143.1 GB)
>>   Non-fatal FD errors:    0
>>   SD Errors:              0
>>   FD termination status:  Canceled
>>   SD termination status:  Error
>>   Termination:            Backup Canceled
>
>
You have software compression on? Turn that off. Let the drive do this
instead. I a LTO2 drive with its hardware compression will compress at
40MB/s or better while I have never had a cpu that could gzip at any
where near that...

>
> I double checked the connection and the 100MBit/s Link is performing as one
> could expect. Are 50GB for spooling not enough? Should i upgrade to GBit
> connection or is there anything else i could try?
>
A gbit connection will allow you to archive the maximum speed of the
drive and without it your full backips will be limited to around
10MB/s instead of 20MB / s or greater.

> tia - tobi
>
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-- 
John M. Drescher

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