On Sun, Aug 24, 2008 at 11:43 AM, Jose Ildefonso Camargo Tolosa
<ildefonso.camargo AT gmail DOT com> wrote:
> Hi, everybody!
>
> I have been thinking about how spooling affects the overall backup
> performance, and I have noticed that while it is despooling, it stops
> reading data from the network (off course, the spool space is full,
> and it can't read any more data).
>
> So, I was thinking: what about using the old-n-good "double-buffer"?,
> I mean, you could split the spool size in half, and spool up to the
> first half, start despooling from *that* half, and while it is
> despooling, start spooling on the other half, and after the first half
> is despooled (it should happend long before the second half is full,
> because tapes are usually faster than network, that's the whole idea
> behind spooling), start spooling on the first half while the tape is
> despooling the second half.  This would make the network transfer
> constant, thus increasing the backup performance.  What do you think?,
> would this be very hard to implement?
>
This has been discussed several times on this list. Do a search on the
archives.

John

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