Thanks -- I can not login to the wiki for some reason. I've sent an
email requesting a password reset...
On 3/9/2010 6:21 PM, Dies Koper wrote:
> Hi Byron,
>
> I also made some notes last week:
>
> Today's topic was cluster support for GF V3.1.
>
> During the meeting we referred to the following document (which will
> continuously be updated):
>
> http://wiki.glassfish.java.net/Wiki.jsp?page=V3.1Clustering
>
> For GF V3.1 we're planning cluster support without a Node Agent (NA).
> At the later stage we could consider adding the Node Agent again.
>
> Without a Node Agent, it will not be possible to start remote instances.
> There was an idea to use ssh to replace that functionality from the NA,
> but this will probably not be done in GFv3.1.
>
> One of the main reasons to not including a NA is that people complained
> about it. Not only because of issues they had and because it turned out
> not to be as light-weight as it was initially intended to be, but users
> say they prefer to register their instances with their OS's services
> functionality (Windows service, etc.). This would give them behaviour
> they are familiar with, and provide extra functionality, such as setting
> the maximum number of times an instance should be restarted in case of a
> failure.
>
> Most of the discussion was about the way remote instances should
> synchronise their files (and state) with the DAS.
> In GF v2.x, the deploy process runs on the DAS and the remote instances
> download the post-deployment (including generated) artefacts.
> In GF v3.1, we want the remote instances to do the operations
> themselves, so there would be less issues with file synchronization.
>
> A potential issue with this approach is when deploying of applications
> that require a lot of resources for deployment. For instance, JSPs can
> be precompiled during deployment, and CMP applications access the DB for
> schema generation. This will need to be investigated further
> (performance comparison tests, etc.).
>
> We can also consider optimizations like doing the deploy per DAS instead
> of per
> instance when the cluster's instances are on the same machine, and share
> the files instead of each instance having its own copy.
> Someone pointed out that this could create issues when redeploying an
> application that is already running on a cluster instance. (Classes that
> are in use would be overwritten).
>
> For the file synchronization we would use the files' timestamps. For
> complete subdirectories, only the subdirectories' filestamps would be
> compared.
>
> Discussion on this topic will be continued next week.
>
> Regards,
> Dies
>
>
> On 10/03/2010 13:10, Byron Nevins wrote:
>
>> Thanks! Yes -- the minutes are supposed to go on this same page:
>> http://wiki.glassfish.java.net/Wiki.jsp?page=AdminIteam
>>
>> I'll copy& paste your minutes there...
>>
>> On 3/9/2010 5:42 PM, Dies Koper wrote:
>>
>>> Hi,
>>>
>>> Does someone keep minutes at the meetings?
>>>
>>> At http://wiki.glassfish.java.net/Wiki.jsp?page=AdminIteam I found a one
>>> line minute for Kedar's last meeting, but no info about last week's.
>>>
>>> I made some notes that I can share if you can put them online.
>>> I didn't keep a record of action items and attendees, and they only
>>> cover the parts of conversations I could understand and/or was
>>> interested in, but maybe better than nothing.
>>>
>
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--
Byron Nevins - Sun Microsystems, Inc.
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