Re: [Bacula-users] Copy disk to tape is 4x slower than tar

On Mar 10, 2016, at 6:35 PM, compdoc <compdoc AT hotrodpc DOT com> wrote:

Given LTO-4 can do 120MB/s, yeah, 94 is good enough

Be sure to disable compression. I think I have it disabled two places, on Dir and well as on the SD.

Side note: I see compression mentioned at http://www.bacula.org/7.4.x-manuals/en/main/Configuring_Director.html but not at http://www.bacula.org/7.4.x-manuals/en/main/Storage_Daemon_Configuratio.html

http://www.bacula.org/7.4.x-manuals/en/main/New_Features_in_5_2_13.html#SECTION00654000000000000000 mentions 'Storage resource within the Director's configuration' though.

I built a low-power, mini-itx system to house an LTO-4 drive. The controller is an LSI LSI20320IE Ultra320. All backup data is over the lan.

This is my last Windows backup. No spooling:

Elapsed time:           6 hours 13 mins 54 secs
Priority:               10
FD Files Written:       218,515
SD Files Written:       218,515
FD Bytes Written:       610,852,830,755 (610.8 GB)
SD Bytes Written:       610,902,766,901 (610.9 GB)
Rate:                   27228.9 KB/s
Software Compression:   None
Snapshot/VSS:           yes
Encryption:             no

That's 27 MB/s.

Checking for compression:

on bacula server:

$ sudo grep -ri compression /usr/local/etc/bacula/

on bacula sd:

$ sudo grep -ri compression /usr/local/etc/bacula/

No compression specified.

Thank you.

Dan Langille - BSDCan / PGCon

dan AT langille DOT org

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