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From: Terry Lambert <terry@lambert.org>
Newsgroups: comp.unix.bsd.freebsd.misc,comp.os.linux.development.system
Subject: Re: async or sync metadata [was: FreeBSD v. Linux]
Date: 16 Feb 1996 01:08:44 GMT
Organization: Utah Valley State College, Orem, Utah
Lines: 42
Message-ID: <4g0les$gcl@park.uvsc.edu>
References: <4er9hp$5ng@orb.direct.ca> <4fi6gq$3tr@dyson.iquest.net> <4fjodc$o8j@venger.snds.com> <4fopq4$ahl@park.uvsc.edu> <4fu6o5$1uk@pell.pell.chi.il.us>
NNTP-Posting-Host: hecate.artisoft.com
Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:14372 comp.os.linux.development.system:18039
orc@pell.chi.il.us (Orc) wrote:
]
] In article <4fopq4$ahl@park.uvsc.edu>,
] Terry Lambert <terry@lambert.org> wrote:
] >grif@hill.ucr.edu (Michael Griffith) wrote:
] >] Very hard indeed. Here it is one more time:
] >]
] >] sync metadata with async data is not just slower,
] >] it is LESS SAFE. This behavour should not be the default
] >] on any reasonable system. If you want real safety,
] >] then both data and meta need to be synchronous (i.e. no
] >] buffer cache for writes). This real safety comes with
] >] an huge performance hit (as in MSDOS).
] >
] >You don't know what you are talking about. I have referenced
] >both papers and mathematical models for file system recovery
] >to refute this specious claim. The only thing I have seen from
] >the opposition is bind assertion. Blind assertion is not proof.
]
] Can you cite a paper or two, please, so we can contact the
] authors or their sponsoring organizations to get a copy?
Most of the papers at:
http://www.pdos.lcs.mit.edu/~ganger/papers/index.html
qualify.
Try also:
ftp://ftp.ms.uky.edu/pub/tech-reports/UK/cs/225-93.ps.gz
For the VIVA paper.
I have posted this information several times already in this thread...
Terry Lambert
terry@cs.weber.edu
---
Any opinions in this posting are my own and not those of my present
or previous employers.