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[Shoal-Dev] Question about Synchronization of the Distributed State Cache

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Shreedhar Ganapathy

Hi Doal
I was able to download the 1.1 zip file from the home page under "Useful
Links". Could you tell us where in the page did you find the broken link?
I have provided a link below for the latest zip distribution (this zip
is not yet promoted on the website but will do so soon) for your
convenience.

http://download.java.net/glassfish/shoal/promoted/shoal-1.1_04202009.zip

Shoal 1.1 should have been released in January but we continued with
fixing issues that were filed as part of our development with Sailfin
and GlassFish projects. We are planning on pushing out a final release
this month.
I will add a roadmap page to the wiki.

--Shreedhar

Doal Miller wrote:
>
> Thanks for the reply. So far I do like the Shoal project and its
> messaging. I was trying to download the 1.1 binaries but it is a
> broken link. Is there a way to get the jars for 1.1? Also is there a
> roadmap so I can get a feel for when 1.1 will be released? I didn't
> see any roadmap information on the site.
>
>
>
> Thanks,
>
> Doal Miller
>
>
>
> *From:* Shreedhar.Ganapathy@Sun.COM [mailto:Shreedhar.Ganapathy@Sun.COM]
> *Sent:* Thursday, May 21, 2009 5:50 PM
> *To:* dev@shoal.dev.java.net
> *Cc:* Doal Miller; users@shoal.dev.java.net; Mahesh Kannan
> *Subject:* Re: [Shoal-Dev] Question about Synchronization of the
> Distributed State Cache
>
>
>
> Hi Doal
> Thanks for posting here.
>
> The current implementation does not have any support at the moment for
> synchronization of the kind you are looking for. In fact its a very
> simple share-all cache with last writer overwriting any previous
> writes. It is also only tested to a limited extent to support
> lightweight cache writes and is not suitable for high throughput
> writes. I admit our focus has been a lot on the group composition and
> lifecycle correctness and these aspects are only now beginning to be
> looked at.
>
> That said, we are looking to significantly improve the Cache
> functionality in the next Shoal rev (version 2.0 - Feb-March 2010
> release timeframe) to provide on-demand caches with configurable
> policies. We are at the requirement gathering stage at this point and
> would welcome any inputs in this respect.
>
> From your description, we would need to ensure message ordering
> guarantees, configurable distributed locking at row, rowset or table
> level, etc.
>
> --Shreedhar
>
>
>
> Doal Miller wrote:
>
> I have been looking at Shoal for some clustering functions for an
> upcoming project. The question I have is can a member synchronize the
> DSC so it is ensured that only one member is changing the cache at any
> given time.
>
>
>
> I thought I might be able to use fencing for this but I see that it
> doesn't stop changes to the DSC, and is specifically for node recovery.
>
>
>
> Is there some way to synchronize changes to the DSC or do you have any
> ideas?
>
>
>
> I appreciate your help, thanks,
>
> Doal Miller
>
> doal.miller@mir3.com
>
>
>
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