[Tomcat-jg-development] load balancing

[Filip H. <fi...@fi...>]

if you need to test out load balancing, I wrote a tcp load balancer with
minor fail over in java. (ie fail over works really well for browsers since
a new connection is established from the client:)) This thing is super easy
to configure.
Note that it is not a complete load balancer. If you are on a unix system I
recommend http://balance.sourceforge.net

check out the source and try it out.

one example is
java -classpath tcploadbalancer.jar com.vrp.io.TcpLoadBalancer -l
vaio:8080 -l vaio:8088 -bindaddress vaio -port 9999

I will check in this code into source forge too
Filip

~
Namaste - I bow to the divine in you
~
Filip Hanik
Software Architect
www.filip.net

>-----Original Message-----
>From: Bela Ban [mailto:be...@ya...]
>Sent: Wednesday, November 13, 2002 4:01 PM
>To: Bruce Duncan
>Cc: Filip Hanik
>Subject: Re: [Tomcat-jg-development] Synchronous mode
>
>
>Bruce Duncan wrote:
>
>> This looks like it is working provided I do not
>> specify Filip's original protocolStack. If I just
>> don't specify the protocolStack then it seems to work
>> alright.
>
>
>Probably you are using a newer version of JavaGroups, which does not
>support the TCP(min_wait_time) parameter anymore. If you enable
>JavaGroups tracing you should see the error message.
>
>
>> The only problem i have encountered is that
>> I get Timeout Exceptions sending messages in some
>> instances. This seems to happen most frequently if I
>> kill a server and then restart it.
>
>
>So sendMessage will wait until that server is suspected and then return.
>So, depending on your protocol stack spec, that might take some time,
>especially if you are using FD as failure detection protocol. You may
>want to set timeout and max_tries in your properties explicitly. Can you
>post the exceptions you are getting so we know whether this is caused by
>(a) unicast or (b) multicast messages ?
>
>> When it tries to get the sessions from the other server(s) it looks
>> like it causes the Timeout Exception.
>
>
>Only in this case ? Filip: what do you think, shouldn't we make fetching
>of state a sync RPC, rather than using 2 async RPCs ?
>
>
>
>--
>Bela Ban
>http://www.javagroups.com
>Cell: (408) 316-4459
>
>