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From Niklas Edmundsson <ni...@acc.umu.se>
Subject Re: Directory listings: LFS issues and other funky stuff
Date Wed, 20 Dec 2006 21:46:57 GMT
On Wed, 20 Dec 2006, William A. Rowe, Jr. wrote:

> Niklas Edmundsson wrote:
>> Yeah. But why is it stat:ing stuff twice? I think that it should be
>> sufficient with one round of stat of the files, and if the subrequests
>> are needed anyway their stat:s should be enough IMO.
>
> You turn off the test with
>
> Options FollowSymLinks
>
> which eliminates our need to lstat+stat.

My config already have:

DocumentRoot "/export/ftp/"
<Directory /export/ftp>
     Options Indexes FollowSymLinks
     ...
</Directory>

I suspect that you're thinking about the subrequests not having to do 
lstat+stat. The problem I'm talking about is (probably) due to mod_ftp 
stat:ing all files first, and then doing subrequests which in turn 
stats all files (except the large ones, which was my initial problem) 
again.

My observations are based on the strace output, so I'm rather unclued 
about which mechanisms causes what.

In any case, the LFS issue(s) needs to be fixed first IMO. Performance 
issues are a non-issue if the thing can't be used at all due to 
non-LFS-capability...

/Nikke
-- 
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  Niklas Edmundsson, Admin @ {acc,hpc2n}.umu.se      |     nikke@acc.umu.se
---------------------------------------------------------------------------
  Practiss makes perfict.
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