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From: bzs@world.std.com (Barry Shein)
Newsgroups: comp.unix.wizards
Subject: Re: Directory compression
Message-ID: <BZS.90Aug19025851@world.std.com>
Date: 19 Aug 90 06:58:51 GMT
References: <7913@lynx.UUCP>
Sender: bzs@world.std.com (Barry Shein)
Distribution: na
Organization: The World
Lines: 17
In-Reply-To: m5@lynx.uucp's message of 15 Aug 90 23:03:16 GMT


>Does 4.3BSD (or anything else) dynamically compress directories when
>entries are removed?  If so, how does the system deal with
>consistency?  Like if I'm reading while something else is unlinking and
>the directory is being compressed, how does the world go on living?
>-- 
>Mike McNally                                    Lynx Real-Time Systems

I believe all that is done is the freeing of (completely) emptied
blocks, so there's no problem. There's really no need, that I can see,
to do any further squeezing (I suppose you could try to smash now
small dirs into frags, not really worthwhile.)
-- 
        -Barry Shein

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