Actually, when I said "timestamp" I mean a unique number. If you rely
on the real timestamp (local machine clock time), the resolution of the
clock may not be good enough. In most cases, it only tells milliseconds.
What is going to happen if two events hit the same milliseconds (on
different machine in a clustering environment)?
Asynchronized mechanizm itself adds some overhead as well. Use
asynchronized mechanizm will not be faster that direct data source access.
--- Guy Rouillier <[EMAIL PROTECTED]> wrote:
> No, that's not how time servers work. You set your computer up to
> synchronize with a time server, and periodically a daemon contacts the
> server to sync. Synchronizing once an hour should be sufficient in most
> cases. You can't go to a central place to get a timestamp because you have
> no idea how long the round trip is going to take, and as you point out that
> would be pretty high overhead anyway.
>
> ----- Original Message -----
> From: "Wei Jiang" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, May 25, 2001 5:30 PM
> Subject: Re: [JBoss-user] async logging
>
>
> > Yes, this is a viable solution, but with performance penality.
> >
> > When you in a clustering enviroment, you need to access a "center" to
> > get a timestamp. This is an extra "remote call" for every logging method
> > call.
> >
> > Have a look at SuperLogging from http://www.acelet.com. It solves all
> > issues in a clustering environment.
> >
> > --- Guy Rouillier <[EMAIL PROTECTED]> wrote:
> > > This issue can be addressed by timestamping your log messages on the way
> out
> > > rather than on the way in. That is, put the timestamp into the
> JMSAppender.
> > > Things of course get complicated in a multi-server environment where you
> > > need coordinated time, but a time server can take care of that.
> > >
> > > ----- Original Message -----
> > > From: "Wei Jiang" <[EMAIL PROTECTED]>
> > > To: <[EMAIL PROTECTED]>
> > > Sent: Friday, May 25, 2001 12:42 PM
> > > Subject: Re: [JBoss-user] async logging
> > >
> > >
> > > > Async does not guarantee the deliver time, so it is not chronological.
> > > > Thank twice before using it.
> > > >
> > > > --- Scott M Stark <[EMAIL PROTECTED]> wrote:
> > > > > The log4j api will be the logging api in JBoss 2.3+ and so this
> simply
> > > > > becomes
> > > > > a log4j configuration issue.
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Gabor Dolla" <[EMAIL PROTECTED]>
> > > > > To: <[EMAIL PROTECTED]>
> > > > > Sent: Thursday, May 24, 2001 1:38 AM
> > > > > Subject: [JBoss-user] async logging
> > > > >
> > > > >
> > > > > > Hi
> > > > > >
> > > > > > Is there any plan to implement async logging ?
> > > > > > I saw an implementation of it recently in a commercial product.
> > > > > > I guess it could be implemented on top of log4j and JMS easily and
> > > > > > this could be transparent to the users of log4j.
> > > > > > When the user call log.info("Hello"); it'd generate a message
> > > > > > and a separate mbean would process it asynchronously maybe in a
> > > different
> > > > > > VM on a different machine. Also this would allow central logging.
> > > > > >
> > > > > > Sorry if this has been discussed earlier.
> > > > > >
> > > > > > Gabor
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > _______________________________________________
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> > > >
> > > >
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