If you have very slow network file transfers from your file daemons to your
disk spool area, it would be better to have a not too large data spooling
area. Because despooling would be unnecessary delayed waiting a job to
reach the total amount of spool area dedicated to it.
Best regards,
Ana
On Tue, Feb 9, 2016 at 9:44 AM, Ana Emília M. Arruda <emiliaarr...@gmail.com
> wrote:
> Hello Heitor and Dan,
>
> When a Job is despooling (disk->tape), the file daemon will wait. It will
> just begin spooling again (if necessary, i.e., amount of space that can be
> used by the job in the spool area is less then the amount of data that will
> be backed up for this client). The others file daemons will be spooling to
> disk.
>
> So IMHO the more large the spool area you could have for a job, the
> minimum interleaving you will have.
>
> It will depend also if you have jobs with very diversified amounts of
> backup data (total backup size per job). I would choose the average value
> (of the total backup size for each job) for the Maximum Spool Size, if I
> did not had enough space in disk to choose the highest value (the highest
> total backup size that a job could have), to minimize data interleaving.
>
> In any way, you will speed up your backups since the network delay for the
> data travels from client to the storage is greater than the transfer speeds
> from disk to tape (supposing your spool area data is not traveling through
> network).
>
> Best regards,
> Ana
>
> On Tue, Feb 9, 2016 at 12:12 AM, Heitor Faria <hei...@bacula.com.br>
> wrote:
>
>> I will backup to disk first, on another SD. Later, I will copy the jobs
>> to the tape library on this new SD
>> which is on another server. The copy jobs will be spooled to local SSD
>> before being written to tape.
>>
>> Sorry about this mess. If you are using disk spooling you don't have to
>> concern about data interleaving, unless your job spool limit is too low.
>>
>> Regards.
>> --
>> =======================================================================
>> Heitor Medrado de Faria - LPIC-III | ITIL-F | Bacula Systems Certified
>> Administrator II
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>>
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