[OpenAFS-devel] Patch to implement default tuning proposal discussed a while ago

[chas williams - CONTRACTOR]

In message <20050816154428.C04501BAF3@citi.umich.edu>,Jim Rees writes:
>I'm inclined to commit the new code and let Niklas or others work on making
>it better for large caches later.  Comments?

how about choosing the sqrt(cachesize/1024) as the "average file size"?

	cachesize	avg file size(k)	#files

	150M		~12			12500
	350M		~18			19444
	1G		~32			32768
	10G		~98			102040
	20G		~143			146653

i choose sqrt() for no particular reason other than the numbers seems to
more closly match the original sizes for smaller caches and for larger
caches it matches the newly suggested average of 32k.  for huge caches
it "safely" limits the amount of kernel space required.