Date: Sun, 22 Mar 1998 21:21:21 -0500 From: Christian Kuhtz <chk@eng.bellsouth.net> To: Karl Denninger <karl@mcs.net>, shimon@simon-shapiro.org Cc: current@FreeBSD.ORG, root@danberlin.resnet.rochester.edu, dyson@FreeBSD.ORG, Terry Lambert <tlambert@primenet.com> Subject: Re: CURRENT Kernel Status Message-ID: <19980322212121.26400@delirium.eng.bellsouth.net> In-Reply-To: <19980322191253.31345@mcs.net>; from Karl Denninger on Sun, Mar 22, 1998 at 07:12:53PM -0600 References: <19980322183922.14684@mcs.net> <XFMail.980322170347.shimon@simon-shapiro.org> <19980322191253.31345@mcs.net>
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> The other "cute" thing is that you can extend a jfs volume while the system
> is online; that's a very cute feature.
Or migrate it from one physical volume to another while it is online. Or..
(a whole host of 24x7 neato features excluded) Well, ask me offline if you
really want to know ;-)
> jfs is a monstrous pig for some uses however (its allocation size is larger
> than ffs) and for that reason its useless for things like news servers - but
> for regular applications its fantastic.
Actually, that has changed in AIX4 when AIX learned about fragments. And if
memory serves, allocation sizes/blocks were always tunable even before that.
Now that you have fragments in JFS, and it makes life a whole lot nicer.
> I hated AIX when I had to work with it, but the one thing you simply
> couldn't argue with was their jfs filesystem.
The AIX learning curve is tough. The nice thing to me is that they really
tried to get to a point where you never have to suspend operations (Sun's
famous Stop-A kludge) or reboot to run your box and adopt to changes in your
environment or failures thereof.
Plus, Journaled Filessystems are deeply ingrained in the OS, and not an
afterthought like in Sun's nasty ODS. I wish I had a jfs in FreeBSD.
Cheers,
Chris (just rejoined freebsd-hackers after years of absence ;-)
--
Christian Kuhtz <chk@eng.bellsouth.net> (770) 522-4000 BellSouth.net
Sr. Network Architect
I speak only for myself, and my opinion belongs to me. Atlanta, GA, U.S.
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