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Re: Inode density - newfs(8)
- To: misc_(_at_)_openbsd_(_dot_)_org
- Subject: Re: Inode density - newfs(8)
- From: Otto Moerbeek <otto_(_at_)_drijf_(_dot_)_net>
- Date: Sun, 28 Nov 2004 08:09:43 +0100 (CET)
On Sun, 28 Nov 2004, Ted Unangst wrote:
> > Regardless of that, I need to increase the inode density to around 1 per
> > 6k (or 4k to be safe, i.e. what it used to be!), and I am wondering what
> > the best way to go about it is. Am I right in thinking that the
> > only/easiest way to change this is through newfs, (single user mode ->
> > dump to tape -> newfs -i 4096 -> restore) or is there another way?
> you can only change inode count by running newfs.
> > Are there any other optimizations I should consider for a filesystem
> > with a high ratio of inodes to data?
Since you need that many inodes your average file size is really small. I
would also consider to use a smaller blocksize and fragment size; the old
defaults were -b 8192 -f 1024. That will automatically give you more
> i would recommend not spending too much time fiddling with newfs options.
That's true, although I'd like to mention that in 3.6 (and even better in
-current) I committed stuff to make large block sizes work better. Certain
combinations of block, fragment and partition sizes would lead to
incorrect file system initialization. That is now fixed.
-Otto (who spent quite some time fiddling with newfs ;-)
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