I have an autochanger with multiple tape drives, and want Bacula to better use
all the drives. I believe I have all of the concurrency settings correct,
because I can run two jobs to two different pools at the same time and one will
run to drive 0 and one to drive 1. So far, so good.
If I run one job (say job A to pool A), the tape from pool A stays in drive 0.
After that has finished, if I start another job (say job B to pool B), the
library will remove the pool A tape from drive 0 and replace it with the pool B
tape in drive 0.
Why doesn't it leave the pool A tape in drive 0 and place the pool B tape in
drive 1? I am still in a testing mode, but the software and autochanger this
will be replacing used the drives in a round-robin mode - every mount would go
to the next higher drive number. For example, the first mount would be drive 0
, the second would be drive 1, third would be drive 2, etc. This spread the
wear across the drives relatively evenly. The way Bacula is currently working
seems to wear out drive 0 the most and the higher drives may or may not ever
get used.
Is there a configuration option I am missing? This seems related to the storage
daemon, so I've listed the relevant part of the SD config below:
Autochanger {
Name = ADIC-i2000-Autochanger
Device = Drive-0
Device = Drive-1
Device = Drive-2
Device = Drive-3
Device = Drive-4
Changer Command = "/app/bacula/bin/mtx-changer %c %o %S %a %d"
Changer Device = /dev/changer
}
#
# Bottom drive in library
#
Device {
Name = Drive-0
Drive Index = 0
Media Type = LTO-2
Archive Device = /dev/nst0
AutomaticMount = yes # when device opened, read it
AlwaysOpen = yes
RemovableMedia = yes
RandomAccess = no
AutoChanger = yes
Spool Directory = /data/spool
Alert Command = "sh -c '/usr/sbin/smartctl -H -l error /dev/sg8'"
}
Device {
Name = Drive-1
Drive Index = 1
Media Type = LTO-2
Archive Device = /dev/nst1
AutomaticMount = yes # when device opened, read it
AlwaysOpen = yes
RemovableMedia = yes
RandomAccess = no
AutoChanger = yes
Spool Directory = /data/spool
Alert Command = "sh -c '/usr/sbin/smartctl -H -l error /dev/sg9'"
}
Device {
Name = Drive-2
Drive Index = 2
Media Type = LTO-2
Archive Device = /dev/nst2
AutomaticMount = yes # when device opened, read it
AlwaysOpen = yes
RemovableMedia = yes
RandomAccess = no
AutoChanger = yes
Spool Directory = /data/spool
Alert Command = "sh -c '/usr/sbin/smartctl -H -l error /dev/sg10'"
}
Device {
Name = Drive-3
Drive Index = 3
Media Type = LTO-2
Archive Device = /dev/nst3
AutomaticMount = yes; # when device opened, read it
AlwaysOpen = yes;
RemovableMedia = yes;
RandomAccess = no;
AutoChanger = yes
Spool Directory = /data/spool
Alert Command = "sh -c '/usr/sbin/smartctl -H -l error /dev/sg11'"
}
Device {
Name = Drive-4
Drive Index = 4
Media Type = LTO-2
Archive Device = /dev/nst4
AutomaticMount = yes; # when device opened, read it
AlwaysOpen = yes;
RemovableMedia = yes;
RandomAccess = no;
AutoChanger = yes
Spool Directory = /data/spool
Alert Command = "sh -c '/usr/sbin/smartctl -H -l error /dev/sg12'"
}
+----------------------------------------------------------------------
|This was sent by tpcshadow AT gmail DOT com via Backup Central.
|Forward SPAM to abuse AT backupcentral DOT com.
+----------------------------------------------------------------------
------------------------------------------------------------------------------
Come build with us! The BlackBerry(R) Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9 - 12, 2009. Register now!
http://p.sf.net/sfu/devconference
_______________________________________________
Bacula-users mailing list
Bacula-users AT lists.sourceforge DOT net
https://lists.sourceforge.net/lists/listinfo/bacula-users
|
