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Message-ID: <10845a340704130642w7c4edf5an8bc41d49c4e1dd86@mail.gmail.com>
Date: Fri, 13 Apr 2007 14:42:06 +0100
Reply-To: RQuadling@GoogleMail.com
To: "Ilia Alshanetsky" <ilia@prohost.org>
Cc: "Rob Richards" <rrichards@ctindustries.net>, 
	"Rasmus Lerdorf" <rasmus@lerdorf.com>, 
	"Matt Wilmas" <php_lists@realplain.com>, internals@lists.php.net
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Subject: Re: [PHP-DEV] Build failure
From: rquadling@googlemail.com ("Richard Quadling")

So why are there missing entries?

I can even get the corruption back again if I use a shorter line (100
rather than 5000).


On 13/04/07, Ilia Alshanetsky <ilia@prohost.org> wrote:
> The new implementation does not use any locks, instead it uses direct
> io, where locks are not necessary for append operations.
>
>
> On 13-Apr-07, at 6:33 AM, Richard Quadling wrote:
>
> > On 05/04/07, Rob Richards <rrichards@ctindustries.net> wrote:
> >> No difference using sprintf()/fwrite() instead of fprintf().
> >>
> >> I did come across a similar issue from apache:
> >> http://mail-archives.apache.org/mod_mbox/httpd-dev/199503.mbox/%
> >> 3C9502272049.aa02036@paris.ics.uci.edu%3E
> >>
> >> Changing to use VCWD_OPEN_MODE, write() and close() seems to work.
> >>
> >> Rob
> >>
> >
> > Using PHP 5.2.2RC2-dev (cli) (built: Apr 13 2007 04:03:02) on
> > Windows with
> >
> > for %x in (A B C D E F G H I J K L M N O P Q R S T U V W X Y Z) do
> > start php -r "ini_set('error_log','/tmp/test.log');for($i=0;$i<1000;
> > $i++)error_log(str_repeat('%x',5000));"`;
> >
> > And then doing some analysis of the log file I'm finding that not all
> > the data has been written.
> >
> > Array
> > (
> >    [A] => 4965993
> >    [B] => 4590918
> >    [C] => 4525905
> >    [D] => 4695939
> >    [E] => 4495899
> >    [F] => 4710942
> >    [G] => 4495899
> >    [H] => 4645929
> >    [I] => 4540908
> >    [J] => 4580916
> >    [K] => 4535907
> >    [L] => 4470894
> >    [M] => 4480896
> >    [N] => 4550910
> >    [O] => 4610922
> >    [P] => 4500900
> >    [Q] => 4630926
> >    [R] => 4480896
> >    [S] => 4500900
> >    [T] => 4535907
> >    [U] => 4630926
> >    [V] => 4470894
> >    [W] => 4645929
> >    [X] => 4825965
> >    [Y] => 4845969
> >    [Z] => 4920984
> > )
> > Lines (Should be 26 * 1000) : 23973
> > Longest (Should be 5024) : 5024
> > Shortest (Should be 5024) : 5024
> >
> > Out of the 26,000 lines expected we are missing 2027 lines.
> >
> > So no corruption of the lines, just missing ones.
> >
> > The only explanation I can think of is that the locking is working,
> > but nothing is waiting for the lock to become available.
> >
> > Richard.
> >
> >
> > --
> > -----
> > Richard Quadling
> > Zend Certified Engineer : http://zend.com/zce.php?
> > c=ZEND002498&r=213474731
> > "Standing on the shoulders of some very clever giants!"
>
> Ilia Alshanetsky
>
>
>
>
>


-- 
-----
Richard Quadling
Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
"Standing on the shoulders of some very clever giants!"