[stgt] Performance Issue

FUJITA Tomonori fujita.tomonori at lab.ntt.co.jp
Wed Dec 7 21:41:12 CET 2011

On Wed, 07 Dec 2011 15:48:27 +0100
Gabriele Mailing <gabriele.mailing at rvmgroup.it> wrote:

> testing tgt under Debian Squeeze (i386 and amd64) gives me poor 
> performance writing to a virtual tape.
> It reaches maximum 20Mb/s where a simple scp would reach 97 Mb/s.
> Where do I have to look to investigate ?

Unlike scp, the virtual tape code calls fsync with every write to make
sure that the data is written to disk. 
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