Path: utzoo!attcan!uunet!kddlab!titcca!cc.titech.ac.jp!necom830!mohta
From: mohta@necom830.cc.titech.ac.jp (Masataka Ohta)
Newsgroups: comp.arch
Subject: Re: Real disk FASTER than Ram disk
Message-ID: <5490@titcce.cc.titech.ac.jp>
Date: 31 May 90 13:23:44 GMT
References: <641@sibyl.eleceng.ua.OZ> <136299@sun.Eng.Sun.COM> <1990May27.210935.8564@murdoch.acc.Virginia.EDU> <3402@auspex.auspex.com> <60196@lll-winken.LLNL.GOV>
Sender: news@cc.titech.ac.jp
Reply-To: mohta@necom830.cc.titech.ac.jp (Masataka Ohta)
Organization: Tokyo Institute of Technology
Lines: 18

In article <60196@lll-winken.LLNL.GOV>
	casey@gauss.llnl.gov (Casey Leedom) writes:

>  It's trivial to avoid the extra copy.

Maybe. But, writing a memory disk device driver is already non-trivial.

Moreover, a memory disk has several limitations including its maximum size.

>  A better solution (as has been pointed out) is to allow for memory
>resident file systems that are only written out to backing disk when
>space is needed.

That is what I have described in a paper titled:

	A fast /tmp file system by delay mount option

						Masataka Ohta