Hi
Rather than looking at doc that's over four years old
The Main TOMCAT out of 4 numbers, act's a Load Balancer itself
Which is exciting and simple for configuration.
http://tomcat.apache.org/tomcat-5.5-doc/cluster-howto.html
Observed this URL, Does the topic Load Balancers /Using the
Just one point:
Notice clustering ussually must be made at the
highest application layer. Generic Clustering support
provided by containers can be of little help in a real
world scenarios.
If you users sessions are simple tomcat sessions
clustering will be enough but if you have complex
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Enrique,
Enrique Arizón wrote:
| If you users sessions are simple tomcat sessions clustering will be
| enough but if you have complex session data structures (let's say for
| example a java.util.ArrayList/Hashtable) you will need custom
| solutions
--- Christopher Schultz [EMAIL PROTECTED]
escribió:
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Enrique,
Enrique Arizón wrote:
| If you users sessions are simple tomcat sessions
clustering will be
| enough but if you have complex session data
structures (let's say for
| example a
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Enrique,
Enrique Arizón wrote:
| | Mysql makes a great help since it use in memory
| (RAM) storage for
| | clustered tables
|
| What are you talking about? The closest thing to
| clustered tables that
| MySQL supports is the FEDERATED storage
Thanks for the quick reply Gary..
Some follow-up questions.
1) So the http server bundled with tomcat doesn't do any help ? like it
doesnt provide any load-balancing implementation ? like e.g. mod-jk which
has to be used in conjunction with apache...Further I presume mod-jk also
handles the
mod_jk handles failover for you.
Clustering tomcat makes it copy sessions to all members of the clusters so
that any member of the cluster can take over the processing of a request
seamlessly from any other. If you requests have no way of getting to the
other members of the cluster, then there is
I didnt see the version you are using but I would suggesttaking a look at this
patch by Peter Rossbach
Also make sure the attributes such as compress are identically configured
between sender and receiver..
http://issues.apache.org/bugzilla/show_bug.cgi?id=34389
Let us know if you need further
HI!
Have you tryed Terracotta for clustering?
I find some days ago, and its very easy and simple to cluster tomcats.
as i remember its free.
regards,
sZabi
2007/10/1, Daniel M Garland [EMAIL PROTECTED]:
Hey
The mcastDropTime attribute controls how long a node waits without a
response from
Hey
The mcastDropTime attribute controls how long a node waits without a
response from a peer before considering it dead. Careful though, I tried
setting this to be much lower than the default and had all sorts of
problems with nodes adding / disappearing all the time; I wonder what
sorts of
A couple of possibilities:
The nightly jobs aren't really related to serving web pages, so they
could be separate programs that are each installed on one server -
thus no synchronization needed. These programs could be implemented as
web apps if you want, so they can be administered through the
Tomcat 6 supports this using the StaticMembershipInterceptor
Filip
Vinu Varghese wrote:
Hi all,
I am trying clustering with tomcat, but I have machines with multicast
disabled. So is there any way to do clustering without multicasting,
like use tcp for notifying member addition and removal
In TC 5.x.x message senders are removed when a multicast heartbeat is
missed.
so if your sender is null, then most likely your multicasting has a few
hickups.
in TC6 there is a safeguard against multicast failures using the TCP
failure detector.
Filip
Spurlock, Robert J wrote:
All,
We've
http://www.harding.motd.ca/autossh/
Filip
Massimiliano Berruti wrote:
You're perfectly right...the problem is we must do this because this
is a sample application we're developping for our university and they
asked to use ssh tunnel or something else to secure connection in the
cluster...
could please point me to some refs describing ssh tunnels integration
on tomcat's cluster members?
Thanx
2006/9/21, Peter Rossbach [EMAIL PROTECTED]:
Use ssh tunnels!
but better use an isolate network...
Regards
Peter
Am 21.09.2006 um 11:15 schrieb Massimiliano Berruti:
Hello,
we set
Massimiliano Berruti wrote:
You're perfectly right...the problem is we must do this because this
is a sample application we're developping for our university and they
asked to use ssh tunnel or something else to secure connection in the
cluster... Thanx for help!
So use VPN to create separate
cause your `hostname` resolves to 127.0.0.1 in /etc/hosts
Filip
Patrick Wang wrote:
Hi all:
I setup the TCPListner's IP address to be auto on 2 separate machines.
Then I used the command netstat -nlp to verify what's listed and found out one
actually bound to 127.0.0.1,
The
Thanks for the reply, I changed the /etc/hosts and it works now.
Pat
-Original Message-
From: Filip Hanik - Dev Lists [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 14, 2006 2:04 PM
To: Tomcat Users List
Subject: Re: Tomcat CLustering listening address
cause your `hostname
http://tomcat.apache.org/tomcat-5.5-doc/cluster-howto.html
Konstantina wrote:
Hello,
I have read that in Tomcat5 there is a way to multicast session data to a
group of servers, so that each has the same information and the client can
contact any server. How can I multicast information saved
share the same information? For
each tomcat I have a separate db to save info for each user.
Thank you in advance,
Konstantina
-Original Message-
From: Filip Hanik - Dev Lists [mailto:[EMAIL PROTECTED]
Sent: Thursday, July 20, 2006 3:49 PM
To: Tomcat Users List
Subject: Re: Tomcat
Yes.
(Here's how
http://tomcat.apache.org/tomcat-5.5-doc/cluster-howto.html
)
Tim
-Original Message-
From: funnybotfreebot [mailto:[EMAIL PROTECTED]
Sent: Sunday, April 30, 2006 10:44 PM
To: users@tomcat.apache.org
Subject: tomcat clustering
is there a way to enable
Hi,
currently the Tomcat 5.0 and 5.5 only supports session replication,
also JBoss to that.
Filip has start a new cluster module and this version supports also
application context replication.
Look at tomcat source catalina/modules/ha and test it.
Peter
Am 20.04.2006 um 18:04 schrieb
http://svn.apache.org/viewcvs.cgi/tomcat/container/tc5.5.x/modules/groupcom/
I'm gonna focus on writing documentation for this module next week, by
then I will publish it to a site so that you can read it
for a quick start, take a look at the LoadTest and the MapDemo applications.
For a very
Thanks, Filip!
--
Len
On 4/21/06, Filip Hanik - Dev Lists [EMAIL PROTECTED] wrote:
http://svn.apache.org/viewcvs.cgi/tomcat/container/tc5.5.x/modules/groupcom/
I'm gonna focus on writing documentation for this module next week, by
then I will publish it to a site so that you can read it
for
I'm starting to look at a similar problem. Where can I find info about
the Tomcat Tribes module?
--
Len
On 4/20/06, Filip Hanik - Dev Lists [EMAIL PROTECTED] wrote:
In tomcat 6, maybe 5.5.x we will have a ReplicatedContext, meaning that
the context attributes are replicated.
So you can store
Yes and no!
Speak with your network admin that the multicast send to other global
machine. Not working over normal internet ways!
I thing clustering is made for local network failover. What you need
are cluster domains. Gropus of clusters with a separate loadbalancer
to route request
actually, the answer is no, even if you enable multicast over WAN, you
are dealing with some serious security issues, cause the the
transmission of the data is not encrypted and you are facing a serious
liability.
For TC6 we have separated out the comm protocol from the replication
logic, and
would carry multicast, it work be
technically feasible and as secure as your VPN.
?
Tim
-Original Message-
From: Filip Hanik - Dev Lists [mailto:[EMAIL PROTECTED]
Sent: Friday, March 17, 2006 8:16 AM
To: Tomcat Users List
Subject: Re: Tomcat clustering
actually, the answer is no, even
David Rees wrote:
On 3/17/06, Filip Hanik - Dev Lists [EMAIL PROTECTED] wrote:
You conveniently left out a crucial part of Tim's note which would
address any security concerns as well as having to cooperate with
ISPs:
no I didn't, had you actually read the whole thread :)
It boils
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