Hi,
On 2/21/2006 5:22 PM, Ryan Novosielski wrote:
What are the requirements for such a situation? They must be A)
simultaneous and B) concurrent jobs must be set to more than one and C)
the backups must write to the same tape in the pool?
My view of this topic is the following. Spooling is reasonable, when
A) your clients deliver data much slower than your tape drive needs it.
Usually the case for incremental backups, IMO
B) your clients deliver data much faster than your tape can handle it.
Activting spooling helps shorten the backup-induced load on the clients,
hopefully allowing you to stay inside your backup windows.
C) You run multiple jobs in parallel and want to keep jobs together on
tape (to allow much faster restores, usually).
C is, I guess, what Alan was meaning.
In case B, keep in mind that the backup jobs themselves will not be
finished when the data is completely spooled, but the client load during
despooling is rather non-existent.
And I guess I forgot some more reasons and scenarios...
Arno
---- _ _ _ _ ___ _ _ _
|Y#| | | |\/| | \ |\ | | | Ryan Novosielski - User Support Spec. III
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Alan Brown wrote:
On Mon, 20 Feb 2006, Dan Langille wrote:
IMHO, spooling only really makes sense if your incoming data cannot
keep up with the tape drive.
...or if you are making multiple simultaneous backups...
AB
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