I should be able to post some numbers we're seeing for compilebench on
various filesystems next week, including ext4 without a journal
(Frank's patch).

Curt

On Thu, Dec 18, 2008 at 10:13 AM, Michael Rubin [off-list ref] wrote:

On Thu, Dec 18, 2008 at 10:00 AM, Jan Kara [off-list ref] wrote:

quoted

 Interesting although I'm not that surprised because those tests seem
to do a lot of data changes (which are never journaled in fact) and tiny
amount of metadata changes. If you run some benchmark doing lots of
directory operations, I guess the numbers would be considerably
different.

Actually we have some compile bench numbers (coming to this list soon)
that also surprised us.
The stages of compile bench that I believe are dominated by directory
operations are also
showing improvements without the journal.

quoted

Maybe trying dbench (I know it's kind of stupid ;) or
postmark will show the differences better.

I admit also we see huge variance using dbench on subsequent runs. To
the point where I don't know how much I trust it's numbers.
Is this a tool that people on this list have a lot of faith in?

mrubin
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