Hey there!
New question for you, about job compression (on tapes)
I'm running Bacula 7.4.4 server, with a 5.2.6 client (and PG db)
My client has 1.3 To to backup, i'm having an LTO4 drive, meaning 800Go native,
1.6To compressed, so I've set my pool to have a Maximum Volume Bytes to 1600G
I've read on Bacula docs that for tapes, it's better not to configure
compression in FileSet, and leave the hardware part do the compression
So what I did (as docs said) is to
- cat /sys/class/scsi_tape/nst0/default_compression which has "1" value
+
root@server:~# tapeinfo -f /dev/nst0
Product Type: Tape Drive
Vendor ID: 'TANDBERG'
Product ID: 'LTO-4 HH '
Revision: 'U519'
Attached Changer API: No
SerialNumber: 'HU1023AMW9'
MinBlock: 1
MaxBlock: 16777215
SCSI ID: 1
SCSI LUN: 0
Ready: yes
BufferedMode: yes
Medium Type: Not Loaded
Density Code: 0x46
BlockSize: 0
DataCompEnabled: yes
DataCompCapable: yes
DataDeCompEnabled: yes
CompType: 0x1
DeCompType: 0x1
BOP: yes
Block Position: 0
Partition 0 Remaining Kbytes: 800226
Partition 0 Size in Kbytes: 800226
ActivePartition: 0
EarlyWarningSize: 0
NumPartitions: 0
MaxPartitions: 0
So the compression seems to be enabled here
The fact is, when I run my backup, only ~1.1 To is used on the tape before
being Full
+---------+------------+-----------+---------+-------------------+----------+--------------+---------+------+-----------+-----------+---------------------+-----------+
| mediaid | volumename | volstatus | enabled | volbytes | volfiles |
volretention | recycle | slot | inchanger | mediatype | lastwritten |
expiresin |
+---------+------------+-----------+---------+-------------------+----------+--------------+---------+------+-----------+-----------+---------------------+-----------+
| 2 | xxxxxxxx | Full | 1 | 1,090,410,854,400 | 1,090 |
2,592,000 | 1 | 0 | 0 | LTO-4 | 2019-01-21 03:25:59 |
2,569,770 |
+---------+------------+-----------+---------+-------------------+----------+--------------+---------+------+-----------+-----------+---------------------+-----------+
On the error mail, I can see that
21-Jan 03:26 server-sd JobId 3: End of medium on Volume "xxxxxxxxx"
Bytes=1,090,410,854,400 Blocks=16,902,449 at 21-Jan-2019 03:26.
The number of blocks is almost the same than in the tapeinfo command.
Is the "problem" coming from here ?
Anything I can configure to have more that 1.1To used ?
Thank you!
-----------
Pool {
Name = QUOT
Pool Type = Backup
Volume Retention = 30 days
Storage = Lecteur_LTO4
Recycle = yes
AutoPrune = yes
RecyclePool = QUOT
Maximum Volume Bytes = 1600G
}
Storage {
Name = Lecteur_LTO4
Password = --
Address = server
SDPort = 9103
Device = Lecteur_LTO4
Media Type = LTO-4
}
Device {
Name = Lecteur_LTO4
Archive Device = /dev/nst0
Media Type = LTO-4
LabelMedia = no
Random Access = no
AutomaticMount = yes
RemovableMedia = no
AlwaysOpen = yes
}
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