[Zope] DirectoryStorage and UFS2

Matt Hamilton matth at netsight.co.uk
Wed May 19 13:18:48 EDT 2004

Ken Gunderson wrote:

> I am unsure whether UFS2 would best utilize the "chunky" or "busy" 
> options.  The 64 bit pointers allow for up to 65K subdirs w/in a dir, 
> correct?  So the large number of subdirs under chunky format could be 
> handled.  Dirhash and dirpref can deal can cope with large numbers of 
> files per directory, correct.  But then doesn't UFS2 still use more 
> linear model?  
> Any insights from the FBSD/filesystem gurus would be appreciated.

We use DirectoryStorage on UFS+softupdates on FreeBSD 4.x and use bushy. 
    I did a few simple tests of bushy vs. chunky and didn't get any 
significant difference.  Whether this holds true for UFS2 or not I don't 


Matt Hamilton                                       matth at netsight.co.uk
Netsight Internet Solutions, Ltd.        Business Vision on the Internet
http://www.netsight.co.uk                             +44 (0)117 9090901
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