On 10/03/10 15:58, David Noriega wrote:
> No one?
>
> On Thu, Sep 30, 2010 at 10:37 AM, David Noriega <tsk133 AT my.utsa DOT edu>
> wrote:
>> I come from using Symatanic's NetBackup software, so if my vocabulary
>> or concepts are off or incompatible with Bacula, please let me know.
>>
>> Here is the scenario: A file server hosting home directories needs to
>> be backed up regularly and quickly. Approx 10Tb.
>>
>> A simple full backup of /home would just take too long because it was
>> in essence a single file stream to a single tape drive. On the old
>> system using NetBackup, I configured it so 1) The backup job of /home
>> was separated into multiple streams(ie /home/[a-e], /home/[f-j], etc)
>> and 2) the streams were sent to two tape drives. This showed a
>> significant improvement in how long it took to complete the backup.
>>
>> So I was wondering how can I do the same with Bacula. I've read it
>> supports multiplexing, which is the same term used in NetBackup's
>> documentation, so its my assumption that they are similar. Also as a
>> sort of wish list item, it would be nice if there was a way to 'load
>> balance' each stream. In my example above, they were separated simply
>> by using their first letter, this leads to some streams finishing more
>> quickly then others. Any experience in spreading the load equally?
There is no built-in functionality for "load balancing" in bacula. If
you wanted to set up multiplexing like this, what you would need to do
is set up multiple Jobs for that client, each with its own Fileset, and
run them concurrently, dividing them between two different Pools each
serviced by one of the tape drives. You'd have to experiment to find
the number of concurrent Jobs that gave you the best throughput.
--
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