as well. I'll take a
look. . . .
Aaron
> -Original Message-
> From: Filip Hanik [mailto:[EMAIL PROTECTED]]
> Sent: Friday, February 15, 2002 9:12 PM
> To: Tomcat Developers List
> Subject: Re: Tomcat: Distributed Session Management revisited
>
> hi, let me intr
hi, let me introduce myself.
My name is Filip Hanik and I just rejoined this mailing list since my time
has freed up a little bit lately.
I was looking through the source code and the archives and was wondering
what the status Tomcat has on session replication.
When looking through the source cod
List" <[EMAIL PROTECTED]>; "Tom Drake"
<[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 11:41 AM
Subject: Re: Tomcat: Distributed Session Management revisited
|
|
| On Tue, 13 Nov 2001, Tom Drake wrote:
|
| > I want a distributed session store, where all sessions
>> Costin,
>>
>> that point of view is really interesting. What about separating the
>> distribution part from the integration part of a integrated solution.
>> That would user's give the option to use the "transparent session
>> replication" or to use "explicit object replication services".
>> Th
seum on this list).
Tom
- Original Message -
From: "Mika Goeckel" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Thursday, November 15, 2001 3:24 AM
Subject: Re: Tomcat: Distributed Session Management revisited
| Costin,
|
| that p
On Thu, 15 Nov 2001, Mika Goeckel wrote:
> Costin,
>
> that point of view is really interesting. What about separating the
> distribution part from the integration part of a integrated solution.
> That would user's give the option to use the "transparent session
> replication" or to use "explicit
, November 14, 2001 6:27 PM
Subject: Re: Tomcat: Distributed Session Management revisited
> To clarify: creating a Distributed Session Manager is a good idea, and
> something that would be great for users.
>
> My problem is with designing it at container-level, as an implementation
> o
To clarify: creating a Distributed Session Manager is a good idea, and
something that would be great for users.
My problem is with designing it at container-level, as an implementation
of the servlet session API.
Having all objects in a session distributed and no control or feedback is
not good.
[EMAIL PROTECTED] wrote:
>
> On Tue, 13 Nov 2001, Paul Speed wrote:
>
> > I think the idea is that you'd byte compare on "commit" which ideally
> > would happen at request boundaries. So in this case a single request
> > becomes a "transaction"... which indeed opens up its own issues, but
> > n
November 2001 11:26
An: Tomcat Developers List
Betreff: Re: Tomcat: Distributed Session Management revisited
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Wednesday, November 14, 2001 12:26 AM
Subject: Re: Tomcat: Dis
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Wednesday, November 14, 2001 12:26 AM
Subject: Re: Tomcat: Distributed Session Management revisited
> On Tue, 13 Nov 2001, Mika Goeckel wrote:
>
> >
On Tue, 13 Nov 2001, Paul Speed wrote:
> I think the idea is that you'd byte compare on "commit" which ideally
> would happen at request boundaries. So in this case a single request
> becomes a "transaction"... which indeed opens up its own issues, but
> no bigger than the ones that were always
See below
- Original Message -
From: "Paul Speed" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 3:48 PM
Subject: Re: Tomcat: Distributed Session Management revisited
... stuff deleted ...
|
| Th
[EMAIL PROTECTED] wrote:
>
> On Tue, 13 Nov 2001, Mika Goeckel wrote:
>
> > I completely agree, that the API lacks proactive support for things in the
> > background that may fail.
> > But given the fact, that we support a reference implementation which has
> > managed to provide really profes
Mika Goeckel wrote:
>
[ snip ]
> >
> > I'm not saying this is necessarily a "good" idea, but you can byte
> > compare the resulting session serialization to see if the session
> > objects have changed. All you have to do is keep a local copy of
> > the original session during the request. Not
On Tue, 13 Nov 2001, Mika Goeckel wrote:
> I completely agree, that the API lacks proactive support for things in the
> background that may fail.
> But given the fact, that we support a reference implementation which has
> managed to provide really professional services to users (other ref
> impl
- Original Message -
From: "Paul Speed" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 11:30 PM
Subject: Re: Tomcat: Distributed Session Management revisited
>
>
> Tom Drake wrote:
>
Tom Drake wrote:
>
> - Original Message -
> From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
> To: "Tomcat Developers List" <[EMAIL PROTECTED]>; "Tom Drake"
> <[EMAIL PROTECTED]>
> Sent: Tuesday, November 13, 2001 1:25
See my comments below.
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>; "Tom Drake"
<[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 2:08 PM
Subject: Re: Tomcat: Distributed Session Management
- Original Message -
From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>; "Tom Drake"
<[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 1:25 PM
Subject: Re: Tomcat: Distributed Session Manag
On Tue, 13 Nov 2001, Tom Drake wrote:
> | One question - wouldn't be better if the 'distributed session management'
> | would be first designed and discussed _outside_ of the ServletSession
> | context ?
>
> I agree.
>
> | Designing the SessionManager as a standalone component would make a lot of
<[EMAIL PROTECTED]>
> Subject: Re: Tomcat: Distributed Session Management revisited
>
>
> - Original Message -
> From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
> To: "Tomcat Developers List" <[EMAIL PROTECTED]>
> Sent: Tuesday
>
> Subject: Re: Tomcat: Distributed Session Management revisited
>
>
> - Original Message -
> From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
> To: "Tomcat Developers List" <[EMAIL PROTECTED]>; "Tom Drake"
> <[EMAIL PROT
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Cc: "Tom Drake" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 1:05 PM
Subject: Re: Tomcat: Distributed Session Management revisited
|
| On
- Original Message -
From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 12:31 PM
Subject: Re: Tomcat: Distributed Session Management revisited
|
|
| On Tue, 13 Nov 2001, Mik
- Original Message -
From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>; "Tom Drake"
<[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 11:41 AM
Subject: Re: Tomcat: Distributed Session
See below.
- Original Message -
From: "Pier Fumagalli" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 12:23 PM
Subject: Re: Tomcat: Distributed Session Management revisited
| > ASFAICT, minimal
One question - wouldn't be better if the 'distributed session management'
would be first designed and discussed _outside_ of the ServletSession
context ?
In other words, a SessionManager that would store and provide
fail-over, etc for serializable objects. It can have a rich interface,
including
sage -
From: "Craig R. McClanahan" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 9:31 PM
Subject: Re: Tomcat: Distributed Session Management revisited
>
>
> On Tue, 13 Nov 2001, Mika Goeckel wrote:
&g
On Tue, 13 Nov 2001, Pier Fumagalli wrote:
>
> So, basically, we have to design a lock/unlock mechanism (that complicates
> stuff). It would be easier to achieve without that requirement... (god knows
> why Danny added it).
>
See the answer I just sent for more details -- not enforcing this
re
On Tue, 13 Nov 2001, Mika Goeckel wrote:
> Date: Tue, 13 Nov 2001 21:19:35 +0100
> From: Mika Goeckel <[EMAIL PROTECTED]>
> Reply-To: Tomcat Developers List <[EMAIL PROTECTED]>
> To: Tomcat Developers List <[EMAIL PROTECTED]>
> Subject: Re: Tomcat: Distrib
> Can't help you on that... But, if we "customize" the lookup tables
> abstracting it from JNDI, we could write also some C code for the
web-server
> modules that could participate in our session pooling group, and direct
> requests where they should be, two pigeons with a single shot :)
Somethi
On 13/11/2001 07:59 pm, "Mika Goeckel" <[EMAIL PROTECTED]> wrote:
> Scenario:
>
> 4) 10 Tomcat webservers acting as SessionManagers for Sessions initially
> created by themselves or being assigned responsibility afterwards for a
> specific session.
> In this scenario every Tomcat backs up sessio
On 13/11/2001 07:41 pm, "Craig R. McClanahan" <[EMAIL PROTECTED]> wrote:
>
>
> On Tue, 13 Nov 2001, Tom Drake wrote:
>
>> I want a distributed session store, where all sessions are known (or
>> are knowable) by all members of the cluster, with a built-in
>> fail-over mechanism?
>
> As you guy
On 13/11/2001 06:53 pm, "Tom Drake" <[EMAIL PROTECTED]> wrote:
> | > SNMP, ah ja. I've got no knowledge at all 'bout that, so fight with some
> | > other lobbyists :-)
> |
> | Same here...
>
> Didn't mean to take a left turn. Sorry I mentioned it.
Oh, I mean, I don't mind... The only thing is t
; <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>; "Tom Drake"
<[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 8:41 PM
Subject: Re: Tomcat: Distributed Session Management revisited
>
>
> On Tue, 13 Nov 2001, Tom Drake wrote:
&g
:-)
> | On 13/11/2001 04:38 pm, "Mika Goeckel" <[EMAIL PROTECTED]> wrote:
> |
> | > SNMP, ah ja. I've got no knowledge at all 'bout that, so fight with
some
> | > other lobbyists :-)
> |
> | Same here...
>
> Didn't mean to take a left turn. Sorry I mentioned it.
No need to mention, nobody felt
On Tue, 13 Nov 2001, Tom Drake wrote:
> I want a distributed session store, where all sessions are known (or
> are knowable) by all members of the cluster, with a built-in
> fail-over mechanism?
As you guys discuss this, don't forget a very important requirement in the
servlet specification wi
- Original Message -
From: "GOMEZ Henri" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 9:15 AM
Subject: RE: Tomcat: Distributed Session Management revisited
... stuff deleted ...
| >Notice also,
- Original Message -
From: "Pier Fumagalli" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 8:56 AM
Subject: Re: Tomcat: Distributed Session Management revisited
| On 13/11/2001 04:38 pm, "Mi
>Pier:
>
>Great discussion points. I really appreciate your thoughtful feedback.
>
>My comment about Tomcat caching session data does not preclude
>it from being stored in the remote session server. Indeed, this would
>be required. My thought was this, in a multi-node network if multiple
>contiguo
Hi,
Interesting discussion, it's good to see some on this distribution
issue, the devils always in the detail! See comments
> | > But how would they know where the sessions ended up
>
> All session managers keep a copy of all sessions. So, it doesn't matter
> which server a client talks to
On 13/11/2001 04:38 pm, "Mika Goeckel" <[EMAIL PROTECTED]> wrote:
> SNMP, ah ja. I've got no knowledge at all 'bout that, so fight with some
> other lobbyists :-)
Same here...
> SessionManager/ServletContainer dualism:
> If we don't create a separate SessionManager residing in it's own JVM,
link with.
Mika
- Original Message -
From: "Tom Drake" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 4:47 PM
Subject: Re: Tomcat: Distributed Session Management revisited
> Pier, Mikal:
>
> I
Pier, Mikal:
I agree, I think the juices are flowing. See below
Tom
- Original Message -
From: "Mika Goeckel" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 1:37 AM
Subject: Re: Tomcat: Distribu
throws RemoteException;
public void
removeSessionAttribute(String sessionId, String attributeName, byte
[] value)
throws RemoteException;
- Original Message -
From: "Pier Fumagalli" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <
Pier, Tom,
cool, the discussion is starting to become interesting. :-)
comments below:
- Original Message -
From: "Pier Fumagalli" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Tuesday, November 13, 2001 3:04 AM
Subject:
On 13/11/2001 12:54 am, "Tom Drake" <[EMAIL PROTECTED]> wrote:
> Mika:
>
> Thanks for the reply. Here's some more thoughts on this subject.
>
> The primary problem that I see with the collaborative method
> (e.g. extending the multicast solution) is
> that all sessions will have to be sent to a
On 12/11/2001 11:14 pm, "Mika Goeckel" <[EMAIL PROTECTED]> wrote:
> I would vote for the cooperative approach, but I'd like to add some
> thoughts:
>
> Besides the primary session manager, there needs to be a backup session
> manager that captures the changes of sessions as well and is the crown
mplete failure of the remote session manager.
Tom
- Original Message -
From: "Pier Fumagalli" <[EMAIL PROTECTED]>
To: "Tomcat Developers List" <[EMAIL PROTECTED]>
Sent: Monday, November 12, 2001 4:28 PM
Subject: Re: Tomcat: Distributed Session Mana
It's up to the web-application to replace
these values into
the Session if their contents change. This is enough for us to be able to
track which attributes
have actually changed.
Tom
- Original Message -
From: "Mika Goeckel" <[EMAIL PROTECTED]>
To: "Tomcat
On 12/11/2001 10:19 pm, "Tom Drake" <[EMAIL PROTECTED]> wrote:
> Tomcat Developers:
>
> This is a forward of a message that I sent to Bip and Craig a few days ago,
> regarding distributed session managment (aka Clustering). I haven't gotten
> any feedback just yet, so I thought I'd throw this ou
t: Monday, November 12, 2001 11:19 PM
Subject: Fw: Tomcat: Distributed Session Management revisited
> Tomcat Developers:
>
> This is a forward of a message that I sent to Bip and Craig a few days
ago,
> regarding distributed session managment (aka Clustering). I haven't gotten
>
Tom Drake
Email: [EMAIL PROTECTED]
- Original Message -
From: Tom Drake
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Saturday, November 10, 2001 10:48 PM
Subject: Tomcat: Distributed Session Management revisited
Bip:
I've looked closely at the existing catalina distributed sess
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