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Re: [bug-recutils] Indexing plan

From: Jose E. Marchesi
Subject: Re: [bug-recutils] Indexing plan
Date: Thu, 24 May 2012 22:14:27 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.92 (gnu/linux)

        >     Now I think it would be simpler to store all records in the index 
        >     so parsing the recfile wouldn't be needed.  My other idea was to 
        >     only the offsets in the recfile of their beginning, it would 
        >     e.g. supporting seeks in parsers and keeping the file open while 
        >     database is used.
        > I much prefer the second option.  To keep the file open must not be an
        > issue.
        Will think more what changes would be needed for this.  Seekable parsers
        would be also useful with lazy reading without indices.
    Yes, definitely.  An mmap-based solution could be a good option.

Oh, I see it was me who mentioned mmap first... well, I don't think that
mmap provides any significative advantage to prefer it over
fopen+fseek+ftell in this specific application...

Jose E. Marchesi         http://www.jemarch.net
GNU Project              http://www.gnu.org

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