Re: [Bacula-users] Speed writing to tape drive

John,

For now the DB is on the same raid partition. I our DB admin is building
a new high availability pair that I will move it onto soon.

The data that I am accessing is local but like you said spooling should
help I have about 1.3T of data. How much should I spool at a time? 50G?

Thanks
H 

-----Original Message-----
From: John Drescher [mailto:drescherjm AT gmail DOT com] 
Sent: Wednesday, July 08, 2009 9:28 AM
To: Hayden Katzenellenbogen
Cc: Bacula-users AT lists.sourceforge DOT net
Subject: Re: [Bacula-users] Speed writing to tape drive

On Wed, Jul 8, 2009 at 12:12 PM, Martin Simmons<martin AT lispworks DOT com>
wrote:
>>>>>> On Mon, 6 Jul 2009 10:14:09 -0700, Hayden Katzenellenbogen said:
>>
>> Hello,
>>
>> Thanks to a patch published two weeks ago I am finally making headway
>> into the wonderful world of Bacula. I have a single machine right now
>> with about 1.2T of data I am backing up.
>>
>> When I run the btape fill test I get write speeds of around 70MB/s
when
>> I run a full backup from the local machine I get about 20MB/s is
there
>> anyway to figure out where the bottle neck is?
>
> Are you using software compression (gzip) in Bacula?
>
> What do "top" and "iostat 10" show when running a backup?
>
> You could try using tar to check the speed of your filesystem, e.g.
>
> time tar cf /dev/null /some/very/large/directory
>

Could also be the database. I mean if the db is on the same raid array
as the source disk do not expect 70MB/s backups. Spooling attributes
should help some in this case.

John

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