[Bacula-users] Faster reading of Volumes from disk

I can scp a 5GB Volume from one system to another in about 90 seconds.

Why does that take the SD 8-10 minutes to do the same?

The two systems are on the same 1Gb/s network. We are copying from HDD local to SSD remote.

I'm running a copy job, from disk on one SD to tape on another SD. Data spooling is enabled.

The full job can be seen here https://gist.github.com/dlangille/210fd8a8c3418f9004f6 :

15-Feb 13:32 crey-sd JobId 231187: Forward spacing Volume "FullAuto-3531" to file:block 0:216.
15-Feb 13:41 crey-sd JobId 231187: End of Volume at file 1 on device "vDrive-0" (/usr/local/bacula/volumes), Volume "FullAuto-3531"
15-Feb 13:41 crey-sd JobId 231187: Ready to read from volume "FullAuto-3534" on file device "vDrive-0" (/usr/local/bacula/volumes).
15-Feb 13:41 crey-sd JobId 231187: Forward spacing Volume "FullAuto-3534" to file:block 0:216.
15-Feb 13:51 crey-sd JobId 231187: End of Volume at file 1 on device "vDrive-0" (/usr/local/bacula/volumes), Volume "FullAuto-3534"
15-Feb 13:51 crey-sd JobId 231187: Ready to read from volume "FullAuto-3582" on file device "vDrive-0" (/usr/local/bacula/volumes).
15-Feb 13:51 crey-sd JobId 231187: Forward spacing Volume "FullAuto-3582" to file:block 0:216.
15-Feb 13:59 crey-sd JobId 231187: End of Volume at file 1 on device "vDrive-0" (/usr/local/bacula/volumes), Volume "FullAuto-3582"
15-Feb 13:59 crey-sd JobId 231187: Ready to read from volume "FullAuto-3594" on file device "vDrive-0" (/usr/local/bacula/volumes).
15-Feb 13:59 crey-sd JobId 231187: Forward spacing Volume "FullAuto-3594" to file:block 0:218.

Each volume is 5G and it's taking the SD nearly three times longer than scp to transfer.

$ ls -l FullAuto-3531 FullAuto-3534 FullAuto-3582 FullAuto-3594

-rw-r----- 1 bacula bacula 5368688762 Feb 7 03:26 FullAuto-3531

-rw-r----- 1 bacula bacula 5368688716 Feb 7 03:29 FullAuto-3534

-rw-r----- 1 bacula bacula 5368688096 Feb 7 04:29 FullAuto-3582

-rw-r----- 1 bacula bacula 5368688834 Feb 7 04:31 FullAuto-3594

This is the device in use:

Device {

Name = vDrive-0

Media Type = File

Archive Device = /usr/local/bacula/volumes

LabelMedia = yes

Random Access = yes

AutomaticMount = yes

RemovableMedia = no

AlwaysOpen = no

Autochanger = yes

Drive Index = 0

Maximum Concurrent Jobs = 1

Volume Poll Interval = 15

}

Dan Langille - BSDCan / PGCon

dan AT langille DOT org

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