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From: Michael Hancock <michaelh@cet.co.jp>
Newsgroups: comp.unix.bsd.freebsd.misc,comp.sys.sgi.misc
Subject: Re: no such thing as a "general user community"
Date: Wed, 19 Mar 1997 10:43:00 -0800
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Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:37316 comp.sys.sgi.misc:29246
Matt Dillon wrote:
As far as sensible SMP or filesystems 'like XFS' go. I would
like to point
out that XFS has only very recently become stable, and only
very, VERY
recently has gotten a filesystem quota capability. XFS's only
performance
advantage is in directory lookups. It does not have any other
advantage
over FFS. Filesystem locks and lockout conditions in XFS are
barely
on-par with the locking used in FFS in FreeBSD kernels (whereas
in EFS the
locks were substandard). Furthermore, SGI treats RAID functions
as
extra-cost items, requiring a licence, rather then as native
items. And
they aren't even that good.
There was a suggestion to do name canonization on FBSD because it did a
lot of string copying of the path thru the VOP layers. Namei/ufs_lookup
are pretty hairy, it might be worth it to redo these.
Do you know how XFS does things?
Regards,
Mike Hancock