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Hi,
i did a clean setup of bacula on a
Intel(R) Xeon(TM) CPU 3.60GHz, 3 GB Memory, Intel raid controller forming
5 internal 72 GB-320/10k SCSI LVD drives to a raid 5 array, where
everything is on.
My Quantum M1500 LTO-3 loader is connected via SCSI 160 LVD to the
Adaptec 39160
card.
OS is (but same results with Ubuntu 9.04 server):
[root@denbvsbcks1 ~]# uname -a
Linux denbvsbcks1.int.linuxstar.de 2.6.30.8-64.fc11.x86_64 #1 SMP Fri
Sep 25 04:43:32 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
[root@denbvsbcks1 ~]# cat /etc/redhat-release
Fedora release 11 (Leonidas)
Bacula versions installed:
[root@denbvsbcks1 disk1]# rpm -qa | grep bacula
bacula-docs-2.4.4-3.fc11.x86_64
bacula-storage-common-2.4.4-3.fc11.x86_64
bacula-console-bat-2.4.4-3.fc11.x86_64
bacula-client-2.4.4-3.fc11.x86_64
bacula-sysconfdir-2.4.4-3.fc11.x86_64
bacula-console-2.4.4-3.fc11.x86_64
bacula-director-mysql-2.4.4-3.fc11.x86_64
bacula-console-gnome-2.4.4-3.fc11.x86_64
bacula-director-common-2.4.4-3.fc11.x86_64
bacula-console-wxwidgets-2.4.4-3.fc11.x86_64
bacula-common-2.4.4-3.fc11.x86_64
bacula-traymonitor-2.4.4-3.fc11.x86_64
bacula-storage-mysql-2.4.4-3.fc11.x86_64
Main configuration storage-related:
#
Autochanger {
Name = M1500
Device = LTO-3-0
Changer Command = "/usr/libexec/bacula/mtx-changer %c %o %S %a %d"
Changer Device = /dev/sg3
}
Device {
Name = LTO-3-0
Drive Index = 0
Media Type = LTO-3
Archive Device = /dev/nst0
AutomaticMount = yes; # when device opened, read it
AlwaysOpen = yes;
RemovableMedia = yes;
RandomAccess = no;
AutoChanger = yes
LabelMedia = yes
Alert Command = "sh -c 'tapeinfo -f %c |grep TapeAlert|cat'"
}
Bacua worked out of the box like a charm, except the performance.
I get between 3 -5 MB/sec, depending on type of backup (local backup
server itself is near 5, via GigaBit copper networt it's 3), too slow
for a
LTO-3 drive (equipped with "only" LTO-2 tapes, but ....)
Physical drive performance is 28sec for 1 Gigabyte, so ~35MB/sec
[root@denbvsbcks1 disk1]# dd if=/dev/zero of=swapfile bs=1024
count=1000000
1000000+0 records in
1000000+0 records out
1024000000 bytes (1.0 GB) copied, 79.907 s, 12.8 MB/s
[root@denbvsbcks1 disk1]# date;tar cvf /dev/nst0 swapfile ;date
Fri Oct 2 06:00:22 CEST 2009
swapfile
Fri Oct 2 06:00:50 CEST 2009
So, it's not the physical hardware, it has to be Bacula itself.
btape tests are o.k.
[root@denbvsbcks1 ~]# btape /dev/nst0
Tape block granularity is 1024 bytes.
btape: butil.c:285 Using device: "/dev/nst0" for writing.
02-Oct 05:38 btape JobId 0: 3301 Issuing autochanger "loaded? drive 0"
command.
02-Oct 05:38 btape JobId 0: 3302 Autochanger "loaded? drive 0", result
is Slot 1.
btape: btape.c:372 open device "LTO-3-0" (/dev/nst0): OK
*test
=== Write, rewind, and re-read test ===
I'm going to write 1000 records and an EOF
then write 1000 records and an EOF, then rewind,
and re-read the data to verify that it is correct.
This is an *essential* feature ...
btape: btape.c:831 Wrote 1000 blocks of 64412 bytes.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:847 Wrote 1000 blocks of 64412 bytes.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:856 Rewind OK.
1000 blocks re-read correctly.
Got EOF on tape.
1000 blocks re-read correctly.
=== Test Succeeded. End Write, rewind, and re-read test ===
=== Write, rewind, and position test ===
I'm going to write 1000 records and an EOF
then write 1000 records and an EOF, then rewind,
and position to a few blocks and verify that it is correct.
This is an *essential* feature ...
btape: btape.c:943 Wrote 1000 blocks of 64412 bytes.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:959 Wrote 1000 blocks of 64412 bytes.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:968 Rewind OK.
Reposition to file:block 0:4
Block 5 re-read correctly.
Reposition to file:block 0:200
Block 201 re-read correctly.
Reposition to file:block 0:999
Block 1000 re-read correctly.
Reposition to file:block 1:0
Block 1001 re-read correctly.
Reposition to file:block 1:600
Block 1601 re-read correctly.
Reposition to file:block 1:999
Block 2000 re-read correctly.
=== Test Succeeded. End Write, rewind, and re-read test ===
=== Append files test ===
This test is essential to Bacula.
I'm going to write one record in file 0,
two records in file 1,
and three records in file 2
btape: btape.c:475 Rewound "LTO-3-0" (/dev/nst0)
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:372 open device "LTO-3-0" (/dev/nst0): OK
btape: btape.c:475 Rewound "LTO-3-0" (/dev/nst0)
btape: btape.c:1097 Now moving to end of medium.
btape: btape.c:526 Moved to end of medium.
We should be in file 3. I am at file 3. This is correct!
Now the important part, I am going to attempt to append to the tape.
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:475 Rewound "LTO-3-0" (/dev/nst0)
Done appending, there should be no I/O errors
Doing Bacula scan of blocks:
1 block of 64448 bytes in file 1
End of File mark.
2 blocks of 64448 bytes in file 2
End of File mark.
3 blocks of 64448 bytes in file 3
End of File mark.
1 block of 64448 bytes in file 4
End of File mark.
Total files=4, blocks=7, bytes = 451,136
End scanning the tape.
We should be in file 4. I am at file 4. This is correct!
The above Bacula scan should have output identical to what follows.
Please double check it ...
=== Sample correct output ===
1 block of 64448 bytes in file 1
End of File mark.
2 blocks of 64448 bytes in file 2
End of File mark.
3 blocks of 64448 bytes in file 3
End of File mark.
1 block of 64448 bytes in file 4
End of File mark.
Total files=4, blocks=7, bytes = 451,136
=== End sample correct output ===
If the above scan output is not identical to the
sample output, you MUST correct the problem
or Bacula will not be able to write multiple Jobs to
the tape.
=== Write, backup, and re-read test ===
I'm going to write three records and an EOF
then backup over the EOF and re-read the last record.
Bacula does this after writing the last block on the
tape to verify that the block was written correctly.
This is not an *essential* feature ...
btape: btape.c:475 Rewound "LTO-3-0" (/dev/nst0)
btape: btape.c:710 Wrote first record of 64412 bytes.
btape: btape.c:721 Wrote second record of 64412 bytes.
btape: btape.c:732 Wrote third record of 64412 bytes.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:748 Backspaced over EOF OK.
btape: btape.c:753 Backspace record OK.
btape: btape.c:771
Block re-read correct. Test succeeded!
=== End Write, backup, and re-read test ===
=== Forward space files test ===
This test is essential to Bacula.
I'm going to write five files then test forward spacing
btape: btape.c:475 Rewound "LTO-3-0" (/dev/nst0)
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:1577 Wrote one record of 64412 bytes.
btape: btape.c:1579 Wrote block to device.
btape: btape.c:505 Wrote 1 EOF to "LTO-3-0" (/dev/nst0)
btape: btape.c:475 Rewound "LTO-3-0" (/dev/nst0)
btape: btape.c:1311 Now forward spacing 1 file.
We should be in file 1. I am at file 1. This is correct!
btape: btape.c:1323 Now forward spacing 2 files.
We should be in file 3. I am at file 3. This is correct!
btape: btape.c:475 Rewound "LTO-3-0" (/dev/nst0)
btape: btape.c:1336 Now forward spacing 4 files.
We should be in file 4. I am at file 4. This is correct!
btape: btape.c:1354 Now forward spacing 1 more file.
We should be in file 5. I am at file 5. This is correct!
=== End Forward space files test ===
Ah, I see you have an autochanger configured.
To test the autochanger you must have a blank tape
that I can write on in Slot 1.
Do you wish to continue with the Autochanger test? (y/n): y
=== Autochanger test ===
3301 Issuing autochanger "loaded" command.
Slot 1 loaded. I am going to unload it.
3302 Issuing autochanger "unload 1 0" command.
unload status=OK 0
3303 Issuing autochanger "load 1 0" command.
3303 Autochanger "load 1 0" status is OK.
btape: btape.c:372 open device "LTO-3-0" (/dev/nst0): OK
btape: btape.c:1241 Rewound "LTO-3-0" (/dev/nst0)
btape: btape.c:1248 Wrote EOF to "LTO-3-0" (/dev/nst0)
The test autochanger worked!!
*q
Any clues, what the cause of this bad performance could be ???
Any help very apreciated
Thanks
Klaus
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