On Thu, 26 Aug 2010, me AT free-minds DOT net wrote:

> 1) do we really need to spool? We are not writing to real tapes, we have a
> filesystem as backend (ext3 over glusterfs).

I am one of those that believes spooling to be useful even when writing 
backups to disk; it is obviously not in question that it's good when 
writing to tape. I see the advantages as having the backup volumes less 
fragmented than when writing directly without a spool, especially when 
running many concurrent job, and this increases restoration performance. 
In some scenarios, the spool may be faster anyway; for example, at home I 
spool jobs to a collection of SCSI drives with the pools situated on a set 
of ATA and USB drives (and btw, USB drives are sooooooo slow).

Steve

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