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From: David Masover <ninja@slaphack.com>
To: Hans Reiser <reiser@namesys.com>
Cc: Nicolas Smallwood <smallwood@maya.com>,
	reiser <reiserfs-list@namesys.com>
Subject: Re: searching on groups of files in reiser4
Date: Wed, 27 Apr 2005 16:57:31 -0500	[thread overview]
Message-ID: <42700ACB.1050304@slaphack.com> (raw)
In-Reply-To: <426FA09D.8090009@namesys.com>

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Hans Reiser wrote:
> Nicolas Smallwood wrote:
> 
>> Hello,
>>
>> My question concerns searching through a group of files on reiser4.
>> Assume that we are dealing with a directory full of files (say a few
>> million or so).
>>
>> If I am currently viewing a given file, and wish to iterate to the
>> next file in the directory,
>> is there a method to do so without opening the base directory and
>> moving from one
>> directory entry to the next until you find it?
>>
>> In short, are there any constructs to perform a binary search on these
>> directories instead of a slow
>> O(n) search using seekdir or whatever method?
>>
>> Or is some type of plugin our best route?
> 
> 
> We can write some sort of plugin for you, and it will be the best
> solution.  I assume that readdir() does not do what you need because the
> order you need to iterate in is not that of readdir()?  (Your exact
> phrasing would seem to indicate that your needs are met by iterating
> through the directory using readdir() ).

I'm guessing it's got nothing to do with the order of readdir, simply
that to grep through all files in the directory, readdir is the fastest
option.

I think what he's saying is that he wants a way to do

grep foo *

in a directory of 500 files, 1K each, only he wants it to approach the
speed of

grep foo bar

where "bar" is a 500K file.

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      reply	other threads:[~2005-04-27 21:57 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-04-17  1:38 Segfault on nonexistent journal device Adam Nielsen
2005-04-18 12:56 ` Edward Shishkin
2005-04-27 13:27 ` searching on groups of files in reiser4 Nicolas Smallwood
2005-04-27 14:24   ` Hans Reiser
2005-04-27 21:57     ` David Masover [this message]

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