Re: [Bacula-users] Bacula performance so slow ???

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Hi,

o.k., if my following estimation is true, you are right.

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5-Oct 18:22 denbvsbcks1-sd JobId 3: Job write elapsed time = 00:09:13,
Transfer rate = 5.881 M bytes/second

05-Oct 18:22 denbvsbcks1-sd JobId 3: Committing spooled data to Volume
"DE1820". Despooling 3,259,489,919 bytes ...

05-Oct 18:24 denbvsbcks1-sd JobId 3: Despooling elapsed time =
00:01:32, Transfer rate = 35.42 M bytes/second

05-Oct 18:24 denbvsbcks1-sd JobId 3: Sending spooled attrs to the
Director. Despooling 36,499,907 bytes ...

05-Oct 18:25 denbvsbcks1-dir JobId 3: Bacula denbvsbcks1-dir 2.4.4
(28Dec08): 05-Oct-2009 18:25:11


Does it mean, that the spooling to disk was at avarage of 6 MB/sec,
and the writing to tape
reached the 35 MB/sec.

In that case, the raid ontroller has really a problem, because all is
SCSI U320 LVD.

In above constellation, i reinstalled everything and separated the OS
from the spooling
area (now OS is Raid-1, Spool-area stays at Raid-5)

Thanks

Klaus


John Drescher wrote:
>> 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
>
> I am confused. This looks horribly slow. I would expect over 200 MB
> /s for raid 5 writing. Over 90MB /s for a single SATA2 drive.
>
>> [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
>>
> Its no good to test an LTO drive with a file full of zeros.
> Actually with this file you should get > 60 MB /s with LTO2 tapes
> because zeros will compress down to almost nothing.
>
>> So, it's not the physical hardware, it has to be Bacula itself.
>>
>
> I must be misreading you but this looks like your hardware / os is
> performing very badly or you are using the slowest hardware you
> could find.
>
>
> John
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