From:	rrankin AT primenet DOT com (Rick Rankin)
Subject:	Re: File operations speed-up
18 Mar 1997 02:40:48 -0800 :
Approved:	cygnus DOT gnu-win32 AT cygnus DOT com
Distribution:	cygnus
Message-ID:	<3.0.1.32.19970317202444.007b8c80.cygnus.gnu-win32@mailhost.primenet.com>
Mime-Version:	1.0
X-Sender:	rrankin AT mailhost DOT primenet DOT com
X-Mailer:	Windows Eudora Pro Version 3.0.1 (32)
Original-To:	Sergey Okhapkin <sos AT prospect DOT com DOT ru>,
	"'Gnu-Win32'" <gnu-win32 AT cygnus DOT com>
In-Reply-To:	<01BC32DD.A9EB1B90@gater.krystalbank.msk.ru>
Original-Sender:	owner-gnu-win32 AT cygnus DOT com

What are you going to do about backup utilities that clear this bit when a
file has been backed up? I assume that there are still backup utilities out
there that use the archive bit for determining when a file needs to be
backed up.


At 02:15 PM 3/17/97 +0300, Sergey Okhapkin wrote:
>Hi!
>
>This patch increases the speed of stat/lstat calls dramatically. The trick 
>is simple. Cygwin's stat call implementation reads the beginning of stated 
>file to look for a "magic cookie" to define "executable" and "symlink" 
>attributes of a file. With this patch reading is performed only if file 
>have "archive" bit cleared. All ordinary files (not executables/symlinks) 
>have this bit set. After applying this patch You have to "chmod +x file" on 
>all executables/symlinks. I made a "chmod +x *" on directories with 
>binaries. Later I'll write a special utility "fssync" to examine all files 
>in a given directory tree and to set archive bit according to file magic 
>cookie. Compare the time of "du ." on cygwin's root without and with this 
>patch :-)
>
> 
>
>--
>Sergey Okhapkin
>Moscow, Russia
>Looking for a job.
>
>
>
>Attachment Converted: "e:\eudora\rick\attach\archive.diff"
>
>-
>For help on using this list, send a message to
>"gnu-win32-request AT cygnus DOT com" with one line of text: "help".
>
>
Rick Rankin
rrankin AT primenet DOT com
-
For help on using this list, send a message to
"gnu-win32-request AT cygnus DOT com" with one line of text: "help".

- Raw text -