newfs parameters for a 500 GB volume ?
Jan.Grant at bristol.ac.uk
Thu Apr 3 03:19:34 PST 2003
On Thu, 3 Apr 2003, Heinrich Rebehn wrote:
> Jan Grant wrote:
> >On Thu, 3 Apr 2003, Heinrich Rebehn wrote:
> >>Thank you for your reply. I have reread the manpage and would go for:
> >>- blocksize => 64 kB
> >>- fragsize => 64/8 => 8 kB
> >>- bytes/inode => 16 kB
> >>Are these values reasonable or should i use higher values (because the
> >>disk is so large?)
> >I'd turn bytes per inode up to 200k or so - there's a paragraph in "man
> >7 tuning" on this.
> >If the application is critical then benchmarking "real use" as closely
> >as possible will enable you to find optimal sizes for stripes, and is
> >probably time well spent.
> Oh, i had forgotten the tuning(7) manpage. Neiter newfs nore tunefs
> contain a refrence to it!
> Having read it, i am not so sure about the blocksize any more.I
> t says that going higher that 16K can make the fs slower. Does this
> still hold true?
As far as that's concerned, your best bet would be to benchmark the
application you're intending on using and see how it behaves.
jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/
Tel +44(0)117 9287088 Fax +44 (0)117 9287112 http://ioctl.org/jan/
It's a sad fact that the word "semantics" seems to have lost all meaning.
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