On Thu, 8 Aug 2002 03:51:26 -0400, Howard Martin <howard.martin AT EDS DOT COM>
wrote:

>I find the nwadmin GUI under reports speeds by around 25%,

I have found the same thing, but I have another fact to add. I ran
throughput tests when I was trying to establish the optimum block size for
LTO drives in my SAN environment. I ran some fairly large bigasm backups in
isolation and calculated the time taken from the start and finish times in
daemon.log. I found that the calculated times showed a considerable
difference in throughput compared to the throughputs shown in nwadmin. The
extra fact that I have to add is that the difference is much greater on
Unix (Solaris) systems that it is on Windows 2000 systems - i.e. Windows
systems report closer to reality than Unix systems. The implication of this
is that Unix and Windows systems report the throughputs differently, so you
might have a situation where it appears that a Windows storage node is
writing data faster than a Unix storage node, whereas in fact the opposite
could be true.

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