[infinispan-dev] The need for a 5.1.1

[Manik Surtani]

ISPN-1786 is related to a potential bug in the config parser that didn't pick up numVirtualNodes settings.  As well as a proposal for a different default value for numVirtualNodes - which really should be a separate JIRA.

On 27 Jan 2012, at 07:03, Bela Ban wrote:

> Regarding ISPN-1786, I'd like to work with Sanne/Mircea on trying out 
> the new UNICAST2. In my local tests, I got a 15% speedup, but this is 
> JGroups only, so I'm not sure how big the impact would be on Infinispan.
> 
> If we see a big speedup, UNICAST2 and NAKACK2 could then be backported 
> to a 3.0.4, and added to 5.1.1.
> 
> However, I want to spend some time on testing UNICAST2, so this won't be 
> available tomorrow...
> 
> 
> On 1/26/12 11:42 PM, Manik Surtani wrote:
>> I really didn't want to do this, but it looks like a 5.1.1 will be necessary.  The biggest (critical, IMO, for 5.1.1) issues I see are:
>> 
>> 1. https://issues.jboss.org/browse/ISPN-1786 - I presume this has to do with a bug Mircea spotted that virtual nodes were not being enabled by the config parser.  Which meant that even in the case of tests enabling virtual nodes, we still saw uneven distribution and hence poor performance (well spotted, Mircea).
>> 2. Related to 1, I don't think there is a JIRA for this yet, to change the default number of virtual nodes from 1 to 100 or so.  After we profile and analyse the impact of enabling this by default.  I'm particularly concerned about (a) memory footprint and (b) effects on Hot Rod relaying topology information back to clients.  Maybe 10 is a more sane default as a result.
>> 3. https://issues.jboss.org/browse/ISPN-1788 - config parser out of sync with XSD!
>> 4. https://issues.jboss.org/browse/ISPN-1798 - forceReturnValues parameter in the RemoteCacheManager.getCache() method is ignored!
>> 
>> In addition, we may as well have these "nice to have's" in as well:
>> 
>> https://issues.jboss.org/browse/ISPN-1787
>> https://issues.jboss.org/browse/ISPN-1793
>> https://issues.jboss.org/browse/ISPN-1795
>> https://issues.jboss.org/browse/ISPN-1789
>> https://issues.jboss.org/browse/ISPN-1784
>> 
>> What do you think?  Anything else you feel that is crucial for a 5.1.1?  I'd like to do this sooner rather than later, so we can still focus on 5.2.0.  So please respond asap.
>> 
>> Paul, I'd also like your thoughts on this from an AS7 perspective.
>> 
>> Cheers
>> Manik
>> 
>> --
>> Manik Surtani
>> manik at jboss.org
>> twitter.com/maniksurtani
>> 
>> Lead, Infinispan
>> http://www.infinispan.org
>> 
>> 
>> 
>> 
>> 
>> 
>> 
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> 
> -- 
> Bela Ban
> Lead JGroups (http://www.jgroups.org)
> JBoss / Red Hat
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--
Manik Surtani
manik at jboss.org
twitter.com/maniksurtani

Lead, Infinispan
http://www.infinispan.org