[infinispan-dev] L1 consistency for transactional caches.

Sanne Grinovero sanne at infinispan.org
Tue Jul 2 12:14:01 EDT 2013


I see, so we keep the wrong implementation because it's faster?

:D

On 2 July 2013 16:38, Dan Berindei <dan.berindei at gmail.com> wrote:
>
>
>
> On Tue, Jul 2, 2013 at 6:36 PM, Pedro Ruivo <pedro at infinispan.org> wrote:
>>
>>
>>
>> On 07/02/2013 04:21 PM, Sanne Grinovero wrote:
>> > +1 for considering it a BUG
>> >
>> > Didn't we decide a year ago that GET operations should be sent to a
>> > single node only (the primary) ?
>>
>> +1 :)
>>
>
> Manik had a patch for staggering remote GET calls, but it was slowing down
> reads by 25%: http://markmail.org/message/vsx46qbfzzxkkl4w
>
>>
>> >
>> > On 2 July 2013 15:59, Pedro Ruivo <pedro at infinispan.org> wrote:
>> >> Hi all,
>> >>
>> >> simple question: What are the consistency guaranties that is supposed
>> >> to
>> >> be ensured?
>> >>
>> >> I have the following scenario (happened in a test case):
>> >>
>> >> NonOwner: remote get key
>> >> BackupOwner: receives the remote get and replies (with the correct
>> >> value)
>> >> BackupOwner: put in L1 the value
>> >> PrimaryOwner: [at the same time] is committing a transaction that will
>> >> update the key.
>> >> PrimaryOwer: receives the remote get after sending the commit. The
>> >> invalidation for L1 is not sent to NonOwner.
>> >>
>> >> The test finishes and I perform a check for the key value in all the
>> >> caches. The NonOwner returns the L1 cached value (==test fail).
>> >>
>> >> IMO, this is bug (or not) depending what guaranties we provide.
>> >>
>> >> wdyt?
>> >>
>> >> Pedro
>> >> _______________________________________________
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>> >
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>
>
>
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