Java on Linux talks at Javaone?

[ed phillips]

Hi all,

Is Calvin or anyone else giving any talks on their work to get
the latest JDK and Hotspot going on Linux?

Calvin sent some intriguing hints about the work he had to do
to get Hotspot performing well on Linux, but I'd like more info
or even documentation on it.

Also, who is using native threads in production using Sun's
JDK 1.3.

I am planning on porting a Jakarta/Tomcat/JSP app from Solaris
to Linux and would like to hear from those who are using the latest
and greatest in production. (i.e. what is the most stable highest
performance setup?)

Thanks,

Ed Phillips


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Re: software basico

[ed phillips]

Debes leer el FAQ de blackdown.org antes de preguntar que si
puedes creer applicaciones de Java en Linux. Claro que si puedes.

Y tambien, hay otros versiones del JDK etc. que los del Blackdown.
Pero debes hacer un estudio de la informacion publica antes del
usar una lista como esta.

Ed


Enrique Cabello wrote:

> Hola lista,
>
> Tengo Debian Potato y soy relativamente nuevo en esto del Java,
> conozco la sintaxis basica de Java, applets, servers ... pero solo
> a nivel teorico, es decir, lo que he ido leyendo en libros y
> manuales pero nunca he escrito ningun programa.
>
> Ahora quiero empezar a implementar algunas aplicaciones (estoy
> pensando en aplicaciones de e-commerce) y para ello me he bajado
> de las paginas de SUN los siguientes programas pero no se si son
> estos suficientes, ¿me sobra o me falta alguno? No se si todos
> estan soportados en Debian.
>
> Me podeis echar una mano.
>
> -SDK 1.3.1
> -JRE 1.3.1
> -JDK 1.1.8
> -WEB START 1.0.1
> -JNLP 1.0.1
>
> Gracias,
> /E
>
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Re: Java/Linux at JavaOne

[ed phillips]

Chris,

It might be helpful and may even spawn other suggestions if
you were to flesh out in a post some of the aspects, as you articulate them,
of scaling Java on Linux. Perhaps a kind of pre-BoF statement of the topic
to be discussed?

Thanks,

Ed Phillips



Christopher Smith wrote:

> --On Tuesday, May 29, 2001 15:01:25 -0700 Nelson Minar <[EMAIL PROTECTED]>
> wrote:
> > The Penguin Gets Pumped Up . . . Turning Linux into a High-Powered
> > Java Technology-Based Application Server
> >   Java/Linux performance talk
> >   http://servlet.java.sun.com/javaone/conf/sessions/934/0-sf2001.jsp
> >   Friday June 8, 8:30 AM - 9:30 AM
>
> That's mine. It should be fun. We're mostly going to focus on the
> scalability issue, which appears to be the major question on everyone's
> mind. If anyone thinks there are other things I should be speaking to, say
> it now. ;-)
>
> --Chris
>
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Re: Java/Linux at JavaOne

[ed phillips]

Excuse me,

It is a session not a BoF, but the question still might be helpful
pre-session.



Christopher Smith wrote:

> --On Tuesday, May 29, 2001 15:01:25 -0700 Nelson Minar <[EMAIL PROTECTED]>
> wrote:
> > The Penguin Gets Pumped Up . . . Turning Linux into a High-Powered
> > Java Technology-Based Application Server
> >   Java/Linux performance talk
> >   http://servlet.java.sun.com/javaone/conf/sessions/934/0-sf2001.jsp
> >   Friday June 8, 8:30 AM - 9:30 AM
>
> That's mine. It should be fun. We're mostly going to focus on the
> scalability issue, which appears to be the major question on everyone's
> mind. If anyone thinks there are other things I should be speaking to, say
> it now. ;-)
>
> --Chris
>
> --
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Re: Fwd: Re: Java/Linux at JavaOne

[ed phillips]

Christopher Smith wrote:

> On 31 May 2001 06:45:08 +1000, Jesus M. Salvo Jr. wrote:
> > > 4) Use JNI to use Linux's various asynch I/O API's.
> > Option 4) is how BEA WebLogic Server does it, ( I think ). They have this
> > libmuxer.so ( which is also available for Solaris -- dont know why when JVM
> > for Solaris makes use of solaris native threads ) which enables native I/O,
> > or the so-called "performance pack".
>
> Yes, many of the various application servers employ various strategies
> for this. Unfortunately I am unaware of any of them who have taken the
> time to do this for Linux.
>
> > Speaking of 4), does anyway have a ready-made ( cut&paste ) C code that one
> > can compile into a shared library and have all I/O made through this library
> > via JNI?
>
> I'll be demoing a library that does this with SGI's KAIO patch at the
> presentation (presuming I can iron out this nasty sigtimedwait problem).
>
> > And how does JDK 1.4 affect the performance on Linux, given that 1.4 was
> > better I/O support overall, in particular non-blocking I/O.
>
> We're benchmarking that right now, but it doesn't take a genius to
> realize the impact is pretty spectacular. All you need to do is compare
> Apache's performance with polling I/O based web servers on Linux to get
> a good idea of the potential performance gains.
>
> The NIO API is a little annoying to me though in that it's low enough
> level that it exposing the polling approach to I/O. With the overhead of
> JNI, it's much nicer to use an asynch I/O approach for most Java
> applications.

Chris,

Thanks for providing this pre-session back and forth.  Although I'm excited by
the
prospects and possibility of say option number 4 over the long haul, I've got to
be concerned as much with stability as scalability.  After all, I've got
to serve actually existing applications in production today. ;-)

So, the green threads or the lots of boxes w/tweaking of the kernel have been the
options
of choice for me and my colleagues.  Some people claim that green threads are not
at all
an option when scaling is your objective, so I'm heartened to see that even as
you are
experimenting with SGI's KAIO patch, you've kept green threads as an option.
I assume you are going to address the tradeoffs of the various options in your
presentation?

I'm interested, you might have gathered, in practical, and as stable as possible,
options for
scaling Java on Linux.

Thanks again,

Ed


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Re: Fwd: Re: Java/Linux at JavaOne

[ed phillips]

Christopher Smith wrote:

> On 31 May 2001 10:58:08 -0700, ed phillips wrote:
> > Thanks for providing this pre-session back and forth.  Although I'm excited by
>
> Probably the only way I can get people to show up for 8:30am (someone at
> KeyMedia obviously doesn't like me).
>
> > the prospects and possibility of say option number 4 over the long haul, I've got
> > to be concerned as much with stability as scalability.  After all,
> > I've got to serve actually existing applications in production today.
> > ;-)
>
> Understood. I expect #4 won't be a practical option for another 6
> months. The SGI KAIO patch itself is pretty stable, but the jury is
> still out on my code. ;-) Also, there are kernel developers working on
> their own kernel AIO implementation which is signal free (kills
> portability, but does avoid a ton of hassles with the JVM).
>
> > So, the green threads or the lots of boxes w/tweaking of the kernel have been the
> > options of choice for me and my colleagues.  Some people claim that green threads
> > are not at all an option when scaling is your objective, so I'm
> > heartened to see that even as you are experimenting with SGI's KAIO
> > patch, you've kept green threads as an option. I assume you are going
> > to address the tradeoffs of the various options in your presentation?
>
> The green thread option depends a lot on where you need the scalability.
> As I've said before, in most cases, the scalability need is all about
> I/O performance. Thread-per-I/O has got to be the most inefficient way
> imaginable to represent I/O on a computer. Green threads (and various
> many-to-many thread implementations) get around this (at least from a
> kernel perspective). So they are most definitely a viable option.
> They do, unfortunately, come with some caveats.
>
> > I'm interested, you might have gathered, in practical, and as stable
> > as possible, options for scaling Java on Linux.
>
> I think really most people are. The thing about the Linux world is that
> progress is moving so fast that today's "unstable, untested" feature is
> tomorrows "stable, practical" feature. Heck, I've already had to change
> the slides for this presentation a few times because of progress that
> has been made since I first started putting the presentation together.
> So, I'm going to talk both about what's practical and available here and
> now, but I'm also going to talk about what the future holds. In
> particular, I think if you are starting a project now which will be
> deployed in 6+ months, you have a lot of interesting options to
> consider.
>

Thanks again, Chris. You express well the quandary, if you could call it that, of
choosing the best option when progress is moving so fast.

Ed


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Re: Fwd: Re: Java/Linux at JavaOne

[ed phillips]

Christopher Smith wrote:
> 
> On 31 May 2001 06:45:08 +1000, Jesus M. Salvo Jr. wrote:
> > > 4) Use JNI to use Linux's various asynch I/O API's.
> > Option 4) is how BEA WebLogic Server does it, ( I think ). They have this
> > libmuxer.so ( which is also available for Solaris -- dont know why when JVM
> > for Solaris makes use of solaris native threads ) which enables native I/O,
> > or the so-called "performance pack".
> 
> Yes, many of the various application servers employ various strategies
> for this. Unfortunately I am unaware of any of them who have taken the
> time to do this for Linux.
> 
> > Speaking of 4), does anyway have a ready-made ( cut&paste ) C code that one
> > can compile into a shared library and have all I/O made through this library
> > via JNI?
> 
> I'll be demoing a library that does this with SGI's KAIO patch at the
> presentation (presuming I can iron out this nasty sigtimedwait problem).
> 
> > And how does JDK 1.4 affect the performance on Linux, given that 1.4 was
> > better I/O support overall, in particular non-blocking I/O.
> 
> We're benchmarking that right now, but it doesn't take a genius to
> realize the impact is pretty spectacular. All you need to do is compare
> Apache's performance with polling I/O based web servers on Linux to get
> a good idea of the potential performance gains.
> 
> The NIO API is a little annoying to me though in that it's low enough
> level that it exposing the polling approach to I/O. With the overhead of
> JNI, it's much nicer to use an asynch I/O approach for most Java
> applications.
> 
> --Chris
> 
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> To UNSUBSCRIBE, email to [EMAIL PROTECTED]
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Chris!


I missed your talk at JavaOne, and not just because it was so early in
the morning. ;-)

I missed the entire conference because I had some important things to
take care of, i.e. work!

Are you going to post slides from your presentation anywhere?  Can you
provide a short summary of the talk and questions here or a link to it?

Thanks,

Ed Phillips

In fact, anyone who attended or went to any Java/Linux talks or BoFs at
JavaOne; it would
be interesting to hear on the list from you: short summaries,
interesting questions, new directions


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Re: Fwd: Re: Java/Linux at JavaOne

[ed phillips]

> >
> >Chris!
> >
> >
> >I missed your talk at JavaOne, and not just because it was so early in
> >the morning. ;-)
> >
> >I missed the entire conference because I had some important things to
> >take care of, i.e. work!
> >
> >Are you going to post slides from your presentation anywhere?  Can you
> >provide a short summary of the talk and questions here or a link to it?
> >
> >Thanks,
> >
> >Ed Phillips
> >
> >In fact, anyone who attended or went to any Java/Linux talks or BoFs at
> >JavaOne; it would
> >be interesting to hear on the list from you: short summaries,
> >interesting questions, new directions


paul campbell wrote:
> 
> I missed JavaOne because of the cost.
> 
> If you visit the JavaOne site, they indicate that all the slides
> will be up by June 17.
> 
> The keynotes are already there with audio/video.


Thanks Paul.  Some of the slides may be up by the 17th. ;-)  It would
be nice for the Java/Linux folks, if they have permission, to post text
from presentations, short summaries, and interesting questions here
nonetheless!
or links,

Thanks all,

ed


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Re: linux installed now what

[ed phillips]

Vijay,

There are many forums that deal with the basics of Linux install
and administration. Unfortunately, this is not one of them.
You should do some homework first before you get to specific Java on
Linux questions.

Try typing "install Linux how to" in google.

Happy homework,

Ed


Wim-Jan Hilgenbos wrote:
> 
> On Tue, Sep 04, 2001 at 10:00:51PM -0400, vijay kukreja wrote:
> > hi,
> > i just installed red hat linux 7.0 on my machine.
> > everything in the installation was nice gui based.
> > then after it booted first it just hung up on :
> >
> > loading eth0 interface :
> >
> 
> > i ran ./XF86_SVGA but it kept throwing error that xserver not started and
> > xconfig not found etc .
> 
> 
> 
> > If you'll can give me links on
> > some web site where i can learn this step by step
> 
> Have a look at www.rethad.com and follow the link  to the support
> forums. They have a forum for new users and a forum on X configuration.
> They also have extensive installation documentation that comes with the
> CD.
> Other general linux links: 
> 
> > thanks
> > vijay.
> >
> >m-Jan
> 
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Re: Missing '-version' breaks build of OpenOffice..

[ed phillips]

This is the kind of thing that really slows down Java development!

And some try to say that open source developers have a bias against
Java!

Nonsense. I understand that we are all constrained by larger forces here
and that Sun doesn't have it in them to go all the way (i.e. GPL).
If those of you who work at Sun could just let your managers know our
pain?
Perhaps we could have easier access to the sources, all of them?

Dreamin in SF

And folks wonder why Perl is so appealing

Ed



Alex Buell wrote:
> 
> Hi guys
> 
> Just discovered to my horror that the configure script in OpenOffice
> relies on passing '-version' to javac to check that it is the right
> software to use with it. This problem seen on both intel and sparc
> platforms (1.3.1 and 1.3.0 respectively).
> 
> Any plans to sort this out? Doing 'javac -version' works fine for Sun
> Microsystem's Java2 1.3.1.
> 
> PS: I'm still waiting for 1.3.1 to be released for sparc-linux - look, if
> you haven't got the time, then give me the sources and I will be happy to
> test and report back. I've already signed up for the SCSL and got the
> sources for 1.3.1 on intel-linux, all I need is the sparc-linux code.
> 
> Cheers,
> A Very Frustrated Programmer
> --
> Love is good. Hate is bad.
> 
> http://www.tahallah.demon.co.uk
> 
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Re: Faking out an app that requires a GUI

[ed phillips]

Are you referring, Jim, to an Expect like feature set for Java.

Is there such a set of classes?  Perl has an Expect module. Hmmm

Ed


Joi Ellis wrote:
> 
> On Wed, 12 Sep 2001, Jim Caley wrote:
> 
> > It seems like a year or two ago I saw some sort of utility mentioned on this
> > mailing list that could be used to "fake out" a text-based app that still needed
> > to have a GUI display available.  (Was it that some of the Swing classes wanted
> > the graphical display or something?  I can't remember.)
> >
> > I'm not finding this in the archives.  Does anyone know what I'm talking about?
> 
> I'll guess that you're thinking of the xvfb (virtual frame buffer)
> X11 server which allows apps which manipulate fonts and/or images without
> using a physical display device.  It comes up on headless web servers
> which want to generate dynamic gifs (hit counters) or whatever.
> The image/font manipulation stuff won't load without an X11 display, so
> xvfb is used to provide those resources without using an actual device.
> 
> --
> Joi EllisSoftware Engineer
> Aravox Technologies  [EMAIL PROTECTED], [EMAIL PROTECTED]
> 
> No matter what we think of Linux versus FreeBSD, etc., the one thing I
> really like about Linux is that it has Microsoft worried.  Anything
> that kicks a monopoly in the pants has got to be good for something.
>- Chris Johnson
> 
> --
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Re: Tomcat

[ed phillips]

Luiz Henrique Moraes wrote:
> 
> Hi, any have a tutorial for to install the Tomcat ( Servler / Jsp ) with
> the Apache ?
> 
> Regards,
> Henrique
> 
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Howdy!

http://jakarta.apache.org  has what you are looking for and more.


Ed


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Re: Commercial: new "Beginning Java Networking" book

[ed phillips]

"Alexander V. Konstantinou" wrote:
> 
> Hello Java-Linux subscribers,
> 
> I wanted to let people know about a new Java book that I have co-authored.
> It is called "Beginning Java Networking" and is written as a complete
> introduction to network programming in Java.

> [ As a long-time list reader/contributor I thought I could be forgiven
>   this commercial posting. The relation of the book to Linux is that
>   whenever applicable, we have included Linux-specific information
>   (e.g. Multicast setup) and tested applications with Linux JDKs ]
> 
> Alexander V. Konstantinou
> [EMAIL PROTECTED]
> 

Congratulations!


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Re: SO_KEEPALIVE and Ping

[ed phillips]

> I have a question regarding a ping program
> in Java. I am trying to improve the performance
> of an infinite ping loop 

whatever for?


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