[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: Daniel Phillips <>
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
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:17    [W:0.178 / U:1.724 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site