Date: Wed, 28 Feb 1996 00:39:50 -0500 From: Charles Henrich <henrich@crh.cl.msu.edu> To: atf3r@stretch.cs.virginia.edu, freebsd-fs@freebsd.org Subject: Re: Compressing filesystem for FreeBSD Message-ID: <199602280539.AAA02027@crh.cl.msu.edu> References: <4h0fhq$c40@msunews.cl.msu.edu>
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In lists.freebsd.fs you write:
> The real problem with compressing a file system that is often
>forgotten is that you are increasing the cost in CPU cycles for a disk
>I/O. While I have had dos/linux enthusiasts go on about how compressing
>your filesystem can both improve I/O bandwidth and increase available disk
>space, the cost is often fogotten. On a multi-user system, the CPU is not
>idle during disk I/O. I think there would also be problems with paging
>and reads in general. Which block of the disk contains the nth byte? In
>short, I don't see it being worth the effort.
In real life however, huge numbers of peoples CPU's are idle 99% of the time.
I know for one that my P100 is idling along doing not a damn thing for over 50%
of the time. If I can use that CPU for something productive, Im all for it.
-Crh
--
Charles Henrich Michigan State University henrich@msu.edu
http://pilot.msu.edu/~henrich
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