lkml.org 
[lkml]   [2001]   [Feb]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [Ext2-devel] [rfc] Near-constant time directory index for Ext2
    From
    Date
       From: Daniel Phillips <phillips@innominate.de>
    Date: Thu, 22 Feb 2001 08:24:08 +0100
    Content-Type: text/plain

    > Is it worth it? Well, it means you lose an index entry from each
    > directory block, thus reducing your fanout at each node of the tree by a
    > worse case of 0.7% in the worst case (1k blocksize) and 0.2% if you're
    > using 4k blocksizes.

    I'll leave that up to somebody else - we now have two alternatives, the
    100%, no-compromise INCOMPAT solution, and the slightly-bruised but
    still largely intact forward compatible solution. I'll maintain both
    solutions for now code so it's just as easy to choose either in the end.

    Well, the $64,000 question is exactly how much performance does it cost?
    My guess is that it will be barely measurable, but only benchmarks will
    answer that question.

    - Ted
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:17    [W:3.053 / U:0.468 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site