Date: Wed, 27 Oct 1999 16:48:52 -0500 From: "Damon M. Conway" <damon@chiba.3jane.net> To: Joe Abley <jabley@patho.gen.nz> Cc: "Ronald G. Minnich" <rminnich@lanl.gov>, Chuck Youse <cyouse@paradox.nexuslabs.com>, Ilia Chipitsine <ilia@cgilh.chel.su>, questions@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: why FFS is THAT slower than EXT2 ? Message-ID: <199910272148.QAA10727@chiba.3jane.net> In-Reply-To: Your message of "Thu, 28 Oct 1999 09:58:40 %2B1300." <19991028095839.A26635@patho.gen.nz>
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Joe Abley wrote: > On Wed, Oct 27, 1999 at 10:29:54AM -0600, Ronald G. Minnich wrote: > > To put it slightly more strongly: as far as I'm concerned ext2 is not a > > serious fs if you really care about handling power failures and other such > > fun things. > > I'm not sure I've ever really understood this position. In cases where > data integrity is vital to retain, there is no excuse for not using > machines with multiple power supplies, each fed from independent, clean > power sources, with multiple fans, running a stable, tested OS release. all that and a nice stable fs. if you're going to do it, do it all the way. > Of course, double-point failures _do_ occur. But really, not very often. > Paranoia with FS writes can seem extreme considering that the network > which attaches that machine to the outside world is probably not > engineered to the same degree of fault protection. however, network issues don't cause nearly as much headache as fs crashes. > Just my $0.02. I'm not saying that FFS should throw caution to the > wind (especially not in the default configuration) but to argue that > async writes are only ever used by stupid people is a little unfair :) i never saw an argument that people who use async writes were stupid. i saw a statement that said async writes do not recover from power failures as well, and if you are concerned about that, you shouldn't use an async fs. this thread is chatty enough without misquoting people. damon -- Damon Conway Black Rock City Ranger...Riding the edge of chaos "Ana Ng and I are getting old, but we still haven't walked in the glow of each other's majestic presence." -- TMBG To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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