Carson Gaspar <[EMAIL PROTECTED]> wrote:
> Louwtjie Burger wrote:
> > Dumping a large file from memory using tar to LTO yields 44 MB/s ... I
> > suspect the CPU cannot push more since it's a single thread doing all the
> > work.
> >
> > Dumping oracle db files from filesystem yields ~ 25 MB/s. The interesting
> > bit (apart from it being a rather slow speed) is the fact that the speed
> > fluctuates from the disk area.. but stays constant to the tape. I see up to
> > 50-60 MB/s spikes over 5 seconds, while the tape continues to push it's
> > steady 25 MB/s.
...
> Does your tape drive compress (most do)? If so, you may be seeing
> compressible vs. uncompressible data effects.
HW Compression in the tape drive usually increases the speed of the drive.
Jörg
--
EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin
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[EMAIL PROTECTED] (work) Blog: http://schily.blogspot.com/
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