Good morning folks...
This is my first e-mail to the list, I'm brazilian so, sorry for my english :)
My problem is follow:
I have a dedicated backup server using bacula with disk and LTO-1 storages.
When I was using tar/star unix commands to record the tape I was
getting a transfer rate near of 45Gb/hour, what is
very good (+ or - 13.5M/s).
So I'd decide to install Bacula to do my backups that doesnt fit one tape more..
I'm using bacula 2.2.6 with MySQL 5.0.41 and recording data from the
same server. (bacula-fd, bacula-sd, bacula-dir, mysql and all backuped
data is in same server).
The problem is: When using bacula I can't get more than 20Gb/hour to the tape!.
I'd try with or without Spooling data (100G), using database
batch-insert or not..
Below I post output of one Job:
21-Nov 02:30 bloo-dir JobId 688: Start Backup JobId 688,
Job=BackupImagens.2007-11-21_00.10.25
21-Nov 02:30 bloo-dir JobId 688: Using Device "LTO-1"
21-Nov 02:30 bloo-sd JobId 688: Spooling data ...
21-Nov 03:25 bloo-sd JobId 688: Job write elapsed time = 00:55:25,
Transfer rate = 14.57 M bytes/second
21-Nov 03:25 bloo-sd JobId 688: Committing spooled data to Volume
"BackupProsul-0002". Despooling 48,515,247,286 bytes ...
21-Nov 05:37 bloo-sd JobId 688: Despooling elapsed time = 02:11:13,
Transfer rate = 6.162 M bytes/second
21-Nov 05:37 bloo-sd JobId 688: Sending spooled attrs to the Director.
Despooling 2,251,693 bytes ...
21-Nov 05:37 bloo-dir JobId 688: Bacula bloo-dir 2.2.6 (10Nov07):
21-Nov-2007 05:37:27
Build OS: i686-pc-linux-gnu mandrake (Official)
JobId: 688
Job: BackupImagens.2007-11-21_00.10.25
Backup Level: Differential, since=2007-11-20 02:02:21
Client: "bloo-fd" 2.2.6 (10Nov07)
i686-pc-linux-gnu,mandrake,(Official)
FileSet: "Imagens" 2007-09-03 14:43:17
Pool: "BackupProsul" (From Job resource)
Storage: "LTO-1" (From Job resource)
Scheduled time: 21-Nov-2007 00:10:00
Start time: 21-Nov-2007 02:30:17
End time: 21-Nov-2007 05:37:27
Elapsed time: 3 hours 7 mins 10 secs
Priority: 10
FD Files Written: 7,960
SD Files Written: 7,960
FD Bytes Written: 48,468,569,161 (48.46 GB)
SD Bytes Written: 48,469,981,610 (48.46 GB)
Rate: 4316.0 KB/s
Software Compression: None
VSS: no
Encryption: no
Volume name(s): BackupProsul-0002
Volume Session Id: 15
Volume Session Time: 1195499058
Last Volume Bytes: 94,710,712,320 (94.71 GB)
Non-fatal FD errors: 0
SD Errors: 0
FD termination status: OK
SD termination status: OK
Termination: Backup OK
21-Nov 05:37 bloo-dir JobId 688: Begin pruning Jobs.
21-Nov 05:37 bloo-dir JobId 688: No Jobs found to prune.
21-Nov 05:37 bloo-dir JobId 688: Begin pruning Files.
21-Nov 05:37 bloo-dir JobId 688: No Files found to prune.
21-Nov 05:37 bloo-dir JobId 688: End auto prune.
Check this lines:
21-Nov 03:25 bloo-sd JobId 688: Job write elapsed time = 00:55:25,
Transfer rate = 14.57 M bytes/second
21-Nov 05:37 bloo-sd JobId 688: Despooling elapsed time = 02:11:13,
Transfer rate = 6.162 M bytes/second
First line we can see that my disks can copy (spooling) at this speed.
Second we see tha transfer rate to the tape (LTO1) as 6M/s, what is
very slow treating about a LTO1 tape that can reach 15M/s.
I have no more ideas how improve this speed.. I'm online at #bacula @
freenode.net if someone want talk to me.
Follow some configs that I concert is important:
####### bacula-sd.conf #############
Device {
Name = LTO-1
Device Type = Tape
Media Type = LTO
Archive Device = /dev/nst0
AutomaticMount = yes; # when device opened, read it
Label Media = yes;
Requires Mount = no;
AlwaysOpen = yes;
RemovableMedia = yes;
RandomAccess = no;
Close on Poll = yes;
Offline on Unmount = yes;
Volume Poll Interval = 40 minutes;
# Spooling data
Maximum Spool Size = 100 Gb;
Spool Directory = /backup/bacula-spool;
}
######## bacula-sd.conf ################
######## bacula-dir.conf ################
# Clients Definitions
Client {
Name = bloo-fd
Address = 127.0.0.1
FDPort = 9102
Catalog = MyCatalog
Password = "secret"
File Retention = 25 days
Job Retention = 6 months
AutoPrune = yes # Prune expired Jobs/Files
}
Storage {
Name = LTO-1
Address = 127.0.0.1 # N.B. Use a fully qualified name here
SDPort = 9103
Password = "secret"
Device = LTO-1
Media Type = LTO
Autochanger = no
}
Job {
Name = "BackupImagens"
JobDefs = "DefaultJob"
Level = Differential
Client = bloo-fd
FileSet = "Imagens"
Schedule = "Imagens"
Storage = LTO-1
Pool = BackupProsul
Write Bootstrap = "/var/bacula/working/BackupImagens.bsr"
SpoolData = yes
}
FileSet {
Name = "Imagens"
Include {
Options {
Signature = MD5
aclsupport = yes
}
File = /imagens
}
}
Pool {
Name = BackupProsul
Pool Type = Backup
Recycle = Yes
Auto Prune = Yes
Volume Retention = 25 days
Label Format = BackupProsul
# Maximum Volume Jobs = 11
}
######## bacula-dir.conf ################
Any comment/help will be appreciate :)
--
Flávio do Carmo Júnior aka waKKu
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