Their clustering white paper is also available (or was it linked to from
the admin docs?):
http://www.beasys.com/products/weblogic/server/clustering.pdf
It's pretty fluffy though.
-- Juha
At 10:01 18.7.2000 -0700, you wrote:
>Very interesting indeed, I had the same initial reaction that it was
>simplistic.
>
>I think that relying on the DNS roundrobin trick is actually pretty smart
>and "low-tech". I find their recommendation of NFS'ing their critical
>persistent structures really "low-tech" and smart (I was heading the same
>way btw).
>
>The naming I had never really sat down and thought about it but I think it
>boils down to a trick in the bind that multicasts to all registered copies
>in the cluster. JNDI event Bind is thus a new thing we need to either
>multicast either just Event Propagate. I think that is fairly straight
>forward.
>
>I understand the "stateless" clustering, that is fairly trivial and taken
>care of by the above trick combo. The Entity stuff they don't really
>explain the cache, but I suspect they don't really deal with it? (don't
>know). For the stateful stuff I am not sure I understand. The transaction
>means that the stuff becomes persistent in their mind (what do they mean by
>"relook the home and reapply the transaction"). I had something similar in
>jboss1.0 where the stub was already clusterable and would survive the crash
>of a stateful server given that the instance was passivated (on disk). It
>is actually fairly trivial (couple of lines in Proxy stuff go check it out).
>
>Other than that, I had this strange feeling that sometimes "low-tech" is
>good. See I have a phD in applied stuff, and I know everything breaks all
>the time and nothing works... so something simple is good. It reminds me of
>the time the US air force captured this Russian aircraft and found old
>"bulb" electronic stuff inside. At first they were laughing their heads
>off, thinking they were starting only and then they realized that these did
>not break under EM radiation :). Low tech is good sometimes.
>
>So let's not assume that WL did this without thinking. Maybe there is
>little more to it and then we will look at the real problems in the caches
>;-)
>
>regards
>
>marc
>
>
>
>> -----Original Message-----
>> From: [EMAIL PROTECTED]
>> [mailto:[EMAIL PROTECTED]]On Behalf Of Rickard �berg
>> Sent: Monday, July 17, 2000 11:00 PM
>> To: jBoss Developer
>> Subject: Re: [jBoss-Dev] Clustering of JBoss
>>
>>
>> Hi!
>>
>> Adi Lev wrote:
>> > Look on WebLogic clustering logic from BEA,
>> > read the documentation, here is a url for the documentation:
>> > http://www.weblogic.com/docs51/intro/intro_admin.html
>>
>> Interesting reading. My initial reaction is that it does seem a little
>> simplistic, and don't think it will be very difficult to do something
>> more intelligent. We will see.
>>
>> /Rickard
>>
>> --
>> Rickard �berg
>>
>> @home: +46 13 177937
>> Email: [EMAIL PROTECTED]
>> http://www.telkel.com
>> http://www.jboss.org
>> http://www.dreambean.com
>>
>>
>
>
>
