[OpenAFS-devel] PATCH: limit afsd auto-tuning to 500000 files

[Todd M. Lewis]

Jeffrey Hutzelman wrote:
> 
> We won't know unless we can collect and analyze some data.  Until we do 
> that, repeatedly making changes to the autotuning algorithm isn't going 
> to make things better; it's just going to make it unpredictable.
> 
> 
> So, let's hear from people who are actually using large caches [...]
>
> [...] I'd be very interested to see how either of these numbers 
> varies with cache size, working set size, average file size, or "site 
> size", whatever that means....

I wholeheartedly agree. However, I don't think you're going to get much 
response to this request for data.  Most folks don't even know whether 
they qualify as "people who are actually using large caches". 
Furthermore, everybody who comes up with some numbers to pass on to you 
are going to invent their own methods of gathering that data based on 
their individual misunderstanding of the questions.

OTOH, if you could post a script and say "everybody, please run this and 
send me the results" (presumably the results would be cut-n-paste 
worthy) then you would probably get higher participation and have some 
consistency across the results.  You'd also get some idea -- at least 
across the participants -- of what different cache configurations are 
actually in use.

I understand that that's even more work for you up front, but if you 
really want the data...
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