Il 19/12/2011 17:32, gary artim ha scritto:
> Thanks for the advice, _most_ responsive list I belong to! cheers! gary
> 
> 2011/12/19 Radosław Korzeniewski <radoslaw AT korzeniewski DOT net>:
>> Hello,
>>
>> 2011/12/16 gary artim <gartim AT gmail DOT com>
>>>
>>> No, just Spool Attributes = yes. g.
>>>
>>
>> A "direct" backup from FD into a SD tape device is performed with a little
>> buffering and require more computation, disk seeks and context switching. It
>> is a single, complicated chain with two threads one for FD and one for SD
>> connected through logical network layer (even when a full backup is
>> performed on local machine). With this chain it is very hard to get a full
>> LTO speed. As opposite when you perform SD data spooling, you can easy
>> achieve a full LTO speed because a writing chain (despooling) in SD is very
>> simple and effective. Unfortunately doing a data spool takes a long time and
>> slow down an overall backup speed.
>>
>> best regards
>> --
>> Radosław Korzeniewski
>> radoslaw AT korzeniewski DOT net

Would be curious to know if data spooling made any difference...
Cheers!

-- 
Marcello Romani

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