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From: hsu@cs.hut.fi (Heikki Suonsivu)
Newsgroups: comp.os.386bsd.misc,comp.os.linux
Subject: Re: FYI.. benchmarks on linux and 386bsd
Date: 15 Oct 1993 18:08:53 GMT
Organization: Helsinki University of Technology, Finland
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Distribution: inet
Message-ID: <HSU.93Oct15200852@laphroaig.cs.hut.fi>
References: <2CB12A8D.17397@news.service.uci.edu>
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<29klpf$8ae@kralizec.zeta.org.au>
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In-reply-to: bde@kralizec.zeta.org.au's message of 15 Oct 1993 09:02:07 +1000
In article <29klpf$8ae@kralizec.zeta.org.au> bde@kralizec.zeta.org.au (Bruce Evans) writes:
>for this and therefore risks serious file system corruption should the
...
A measly 10 to 20 times faster. This is one thing makes Linux "feel"
Personally, I would prefer that there would be per-filesystem option to set
whether you wish file system structure updates done synchronously.
Normally one wants the system be reasonably stable, but when doing large
copies of directory trees (like moving contents of one filesystem to
another) it would be nice to avoid extra cost of doing synchronous IO.
What would be even better would be a shadow paging filesystem. This would
avoid need for fsck, avoid synchronous writes (unless explicitly
requested), you could add filesystem transactions and live backups are
safer (you can take a snapshot with little cost). Properly designed this
would probably allow some performance gain, as allocation can be done
freely, write to the track the head happens to be on, if suitable space is
available.
-
Heikki Suonsivu, T{ysikuu 10 C 83/02210 Espoo/FINLAND,
hsu@cs.hut.fi home +358-0-8031121 work -4513377 fax -4555276 riippu SN
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