Hey Steve,
Thanks for your response.
Can you give an example of an issue with parent/child objects that could
occur in the catalog? I can't really think of any.
Changes to the catalog always apply to a single object, and avoiding
references to old versions of catalog objects is a general issue that is
avoided by the use of proxies.
Note also that this cache is only used by jdbcconfig. Jdbcconfig however
can also run without clustering, in which case it relies solely on the
event system to invalidate the cache when changes happen. So if that
system doesn't work, that wpould mean jdbcconfig can't work properly
without hazelcast, which would be an odd situation and is not really the
case.
The use of these resources is all because of this cache, for which I
really see no purpose. A cache per node seems like the best idea.
Regards
Niels
On 05-07-18 21:53, Ikeoka, Steve wrote:
I agree with you that Hazelcast uses a lot of resources and can really
slow down getcapabilities requests but I don't have any more
information about the design of the Hazelcast clustering plugin and
I don't have a cluster environment to test with. If you've been able
to thoroughly test the Hazelcast clustering plugin without the
Hazelcast cache then I would say it's okay to remove it. One thing
that you should test is that there are no issues with parent/child
objects when you are relying only on the catalog events to distribute
changes across the cluster. I think that that may have been part of
the reasoning for the cache serializing/deserializing the catalog data.
Steve Ikeoka
------------------------------------------------------------------------
*From:* Niels Charlier <ni...@scitus.be>
*Sent:* Thursday, July 5, 2018 5:16 AM
*To:* geoserver-devel@lists.sourceforge.net
*Cc:* Ikeoka, Steve
*Subject:* Re: [Geoserver-devel] hazelcast/jdbcconfig cache: why?
Actually, @Steve Ikeoka has made changes to the hazelcast cache in
recent times (CC'ed).
I wonder if he has any experience/insight in this matter?
Regards
Niels
On 04-07-18 16:03, Niels Charlier wrote:
Hello Justin,
Thanks for your answer. I understand that the community status of the
module means that it can have some flaws. Not many have contributed
to it in years actually. I was just wondering about the intent of the
original programmer,if they still remember, so I am better equipped
with knowledge to make improvements.
Regards
Niels
On 04-07-18 15:16, Justin Deoliveira wrote:
I haven't committed to that module in many years so I am the wrong
person to ask. I would start by looking at someone who more recently
has made changes to it, someone from Boundless perhaps. I will say
when I worked on it it was a prototype, something that hadn't seen
any use in production, so I am not surprised if it has issues like
this. Not an uncommon occurrence for community modules I would say.
Given no-one else has responded it seems safe for you to make
whatever changes to it you see fit.
On Wed, Jul 4, 2018 at 6:06 AM Andrea Aime
<andrea.a...@geo-solutions.it <mailto:andrea.a...@geo-solutions.it>>
wrote:
On Wed, Jul 4, 2018 at 1:37 PM, Niels Charlier <ni...@scitus.be
<mailto:ni...@scitus.be>> wrote:
Nobody answers... does anyone know who developed this? Was
it Justin?
I believe he was... see first commit in both these files:
https://github.com/geoserver/geoserver/commits/master/src/community/hz-cluster/src/main/java/org/geoserver/cluster/ClusterConfig.java
https://github.com/geoserver/geoserver/commits/master/src/community/hz-cluster/pom.xml
Do we still have a maintainer for the hzcluster module?
No idea...
Regards
Andrea
==
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