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From Peter Donald <dona...@apache.org>
Subject Re: AW: LogKit - FileRotation
Date Tue, 14 Aug 2001 03:06:20 GMT
On Tue, 14 Aug 2001 04:45, Bernhard Huber wrote:
> FYI, same test with LogKit-1.0b4
> Testsuite: org.apache.log.output.test.TestRotatingFileOutputLogTarget
> Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 23,024 sec
>
> Testcase: testSizeRotationUniqueFilename took 1,503 sec
> Testcase: testSizeRotationRevolingFilename took 1,502 sec

Do you know what the reason is for the variance in the above timing test?

> Testcase: testTimeRotationUniqueFilename took 10,004 sec
> Testcase: testTimeRotationRevolvingFilename took 10,005 sec
>
> ----- Originalnachricht -----
> Von: "Bernhard Huber" <bh22351@i-one.at>
> Datum: Montag, August 13, 2001 6:07 pm
> Betreff: Re: AW: LogKit - FileRotation
>
> > Hi
> > About file-size, I just sum up the message-length using
> > String.length(),that's not 100% exact. As I'm not counting the bytes.
> > I don't think that it neccessary to read the file size from the file.
> >
> > About speed I was testing WIN2k
> > Writing totally  45 File(s)     51.241.655 bytes
> > Testsuite: prantnik.test.log.TestRotatingFileOutputLogTarget
> > Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 22,592 sec
> >
> > Testcase: testSizeRotationUniqueFilename took 1,372 sec,
> > writing:  18 File(s)      2.357.165 bytes
> >
> > Testcase: testSizeRotationRevolingFilename took 1,202 sec
> > writing:  18 File(s)      2.358.725 bytes
> >
> > Testcase: testTimeRotationUniqueFilename took 10,014 sec
> > writing: 4 File(s)     23.577.710 bytes
> >
> > Testcase: testTimeRotationRevolvingFilename took 10,004 sec
> > writing: 4 File(s)     22.948.055 bytes
> >
> > ----- Originalnachricht -----
> > Von: "Carsten Ziegeler" <cziegeler@sundn.de>
> > Datum: Montag, August 13, 2001 4:57 pm
> > Betreff: AW: LogKit - FileRotation
> >
> > > > Peter Donald wrote:
> > > >
> > > > On Tue, 14 Aug 2001 00:03, Carsten Ziegeler wrote:
> > > > > > Peter Donald wrote:
> > > > > >
> > > > > > On Mon, 13 Aug 2001 23:19, Carsten Ziegeler wrote:
> > > > > > > On what basis does the rotation work? File size or date?
> > > > > >
> > > > > > Both or either ;) I used an
> > > > > >
> > > > > > interface RollCondition
> > > > > > {
> > > > > >   boolean roll( LogEvent event, File file );
> > > > > > }
> > > > > >
> > > > > > that allowed you to select the conditions under which you
> >
> > roll.> > > >
> >
> > > > > > > I wrote yesterday (!)
> > > > > >
> > > > > > eek ! It must be the season for it ;)
> > > > > >
> > > > > > > a simple FileTarget which combines
> > > > > > > both attempts, e.g. the usual rotation is done by date:
> > > > > > > Using a configuration a backup is created at the beginning
> > > > > > > of every hour, 12 hours or day. When during this period
> > > > > > > of time the size of the log gets to big (is also
> > >
> > > configurable),> > > > it is also backuped and a new log is created.
> > >
> > > > > > > Perhaps we could join forces here?
> > > > > >
> > > > > > Abvsolutely. The other thing I started to implement was an
> > > >
> > > > interface like
> > > >
> > > > > > interface RollStrategy
> > > > > > {
> > > > > >   File nextFile( File oldFile );
> > > > > > }
> > > > >
> > > > > Do you also have an interface for testing when to roll?
> > > >
> > > > Yep - see above (RollCondition)  ;)
> > >
> > > Ups...
> > >
> > > So your interfaces all depend on File objects. I am not so familiar
> > > with the IO behaviour of Java, but I assume that you open and close
> > > the file each time you write something into the log, right?
> > > Otherwise a RollCondition which checks the file size woudn't work,
> > > or am I wrong here?
> > >
> > > I first implemented the target with this behaviour: opening the
> >
> > file,> appending the information, closing it. But if you have
> > turned on
> >
> > > logging everything this will get soooo slow that I changed this
> > > into using an internal byte counter.
> > >
> > > Carsten
> > >
> > > > > Carsten
> > > > >
> > > > > > Which would do the actuall rolling. So you could select
> >
> > the
> >
> > > > strategy with
> > > >
> > > > > > which you name files - ie
> > > > > >
> > > > > > my.log
> > > > > > my.log.1
> > > > > > my.log.2
> > > > > > my.log.3
> > > > > > (Files after 3rd generation are deleted)
> > > > > >
> > > > > > vs
> > > > > >
> > > > > > my.log
> > > > > > my.log.20010722
> > > > > > my.log.20010611
> > > > > > ...
> > > > > > (logs are infinite and use dates to roll)
> > > > > >
> > > > > > etc.
> > > > > >
> > > > > > So you had configurable generation count (ie number of
> >
> > files
> >
> > > that> > > could be
> > >
> > > > > > present), format of filename etc.
> > > > > >
> > > > > > Howeverything I did was raw and untested properly so it
> >
> > may be
> >
> > > > > > better to work
> > > > > > together to get once better tested system ;)
> > > > > >
> > > > > > > Carsten
> > > > > > >
> > > > > > > Open Source Group                        sunShine -
> > >
> > > b:Integrated> > > >
> >
> > ================================================================>
> >
> > > > > > Carsten Ziegeler, S&N AG, Klingenderstrasse 5, D-33100
> >
> > Paderborn> > > > > www.sundn.de                          mailto:
> > > cziegeler@sundn.de> > > >
> >
> > ================================================================>
> >
> > > > > > > > Peter Donald wrote:
> > > > > > > >
> > > > > > > > On Mon, 13 Aug 2001 22:52, Bernhard Huber wrote:
> > > > > > > > > Hi
> > > > > > > >
> > > > > > > > Hi,
> > > > > > > >
> > > > > > > > > I was implementing a FileRotation for LogKit,
but
> >
> > not
> >
> > > using> > > > > > the very lattest LogKit interfaces.
> > >
> > > > > > > > kool.
> > > > > > > >
> > > > > > > > > Is there a need for this feature?
> > > > > > > >
> > > > > > > > yes very much so.
> > > > > > > >
> > > > > > > > > As I understand
> > > > > > > > > long running server-programs will write big log
> >
> > files.
> >
> > > > Maybe I have
> > > >
> > > > > > > > > overseen something but FileRotation is needed
in
> > >
> > > production> > > > > > environment, or shall Cocoon2, etc
get
> > > restarted ever day :-) ?
> > >
> > > > > > > > I have actually implemented FileRollTarget ages ago
(a
> >
> > year> > > >
> >
> > > > > > or two) but I
> > > > > >
> > > > > > > > didn't own it. I actually reimplemented it a few days
> > >
> > > ago but
> > >
> > > > > > > > wasn't willing
> > > > > > > > to put it into CVS without more testing .. however
if you
> > > > > >
> > > > > > already have a
> > > > > >
> > > > > > > > tested version .... that would be useful ;)
> > > > > > > >
> > > > > > > > Cheers,
> > > > > > > >
> > > > > > > > Pete
> > > > > > > >
> > > > > > > > *-----------------------------------------------------*
> > > > > > > >
> > > > > > > > | "Faced with the choice between changing one's mind,
|
> > > > > > > > | and proving that there is no need to do so - almost
|
> > > > > > > > | everyone gets busy on the proof."              
    |
> > > > > > > > |              - John Kenneth Galbraith          
    |
> > > > > > > >
> > > > > > > > *-----------------------------------------------------*
> > > >
> > > > ---------------------------------------------------------------
> >
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> > > >
> > > >
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> > > > > > --
> > > > > > Cheers,
> > > > > >
> > > > > > Pete
> > > > > >
> > > > > > *-----------------------------------------------------*
> > > > > > * "Faced with the choice between changing one's mind, *
> > > > > > * and proving that there is no need to do so - almost *
> > > > > > * everyone gets busy on the proof."                   *
> > > > > > *              - John Kenneth Galbraith               *
> > > > > > *-----------------------------------------------------*
> > > > > >
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> > > > --
> > > > Cheers,
> > > >
> > > > Pete
> > > >
> > > > *-----------------------------------------------------*
> > > > * "Faced with the choice between changing one's mind, *
> > > > * and proving that there is no need to do so - almost *
> > > > * everyone gets busy on the proof."                   *
> > > > *              - John Kenneth Galbraith               *
> > > > *-----------------------------------------------------*
> > > >
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-- 
Cheers,

Pete

*-----------------------------------------------------*
* "Faced with the choice between changing one's mind, *
* and proving that there is no need to do so - almost *
* everyone gets busy on the proof."                   *
*              - John Kenneth Galbraith               *
*-----------------------------------------------------*

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