[infinispan-dev] Repeatable reads and WSC as default

[Galder Zamarreño]

We keep missing the train :(

Enabling WSC by default is something we've discussed before (JIRA & dev list), e.g.

https://issues.jboss.org/browse/ISPN-3655

Cheers,
--
Galder Zamarreño
Infinispan, Red Hat

> On 24 Feb 2017, at 15:45, Dan Berindei <dan.berindei at gmail.com> wrote:
> 
> I still think WSC should be enabled by default, but we probably missed
> the 9.0 train.
> 
> I see the 8.0 discussion also included batching, i.e. hiding the WSC
> options and forcing batching to use optimistic locking w/out WSC
> (currently batching allows any locking type, but batch transactions
> are isolated from external transactions). That would be at odds with
> Sanne's suggestions in the "major version cleaning" thread, because
> those would require a batch to join any external transaction.
> 
> Cheers
> Dan
> 
> 
> On Fri, Feb 24, 2017 at 3:53 PM, Radim Vansa <rvansa at redhat.com> wrote:
>> Hi all,
>> 
>> I am writing a bit too late in 9.0 cycle, but since I've found couple of
>> bugs [1][2] and spaces for improvement [3][4] in WSC implementation, I
>> was wondering about confirming the performance effect of fixes. And I am
>> wondering if the current defaults for transactional cache, being
>> READ_COMMITTED and WSC off are the best options.
>> 
>> During 8.0 cycle Tristan raised a discussion [5] including WSC defaults
>> and I think that the general opinion was "make it default", which
>> requires RR isolation and simple versioning scheme. But I think that the
>> whole thing [6] went a bit forgotten and all that was done is [7].
>> 
>> Do we want to do this, at least using current API? (we most likely don't
>> want to refactor ConfigurationBuilder when CR2 is out)
>> 
>> Radim
>> 
>> [1] https://issues.jboss.org/browse/ISPN-7526
>> [2] https://issues.jboss.org/browse/ISPN-7527
>> [3] https://issues.jboss.org/browse/ISPN-7528
>> [4]
>> https://github.com/infinispan/infinispan/blob/master/core/src/main/java/org/infinispan/container/entries/ClusteredRepeatableReadEntry.java#L30
>> could be a contention point
>> [5]
>> http://infinispan.markmail.org/message/rasqqkojwdboql7y?q=write+skew+list:org%2Ejboss%2Elists%2Einfinispan-dev+order:date-backward
>> [6] https://issues.jboss.org/browse/ISPN-3927
>> [7] https://issues.jboss.org/browse/ISPN-7507
>> 
>> --
>> Radim Vansa <rvansa at redhat.com>
>> JBoss Performance Team
>> 
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