[infinispan-issues] [JBoss JIRA] (ISPN-3684) Improve L1 consitency with backup owners

William Burns (JIRA) jira-events at lists.jboss.org
Tue Nov 5 09:57:02 EST 2013


William Burns created ISPN-3684:
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             Summary: Improve L1 consitency with backup owners
                 Key: ISPN-3684
                 URL: https://issues.jboss.org/browse/ISPN-3684
             Project: Infinispan
          Issue Type: Enhancement
          Components: Distributed Cache
    Affects Versions: 6.0.0.CR1
            Reporter: William Burns
            Assignee: Mircea Markus
             Fix For: 7.0.0.Final


ISPN-3648 fixed an issue that can occur when a backup owner replies with an outdated value.

More details on the original issue can be found at ISPN-3426.

This JIRA is to improve this fix to be something more desirable.

There are a few ways that this could be done.

# Change it so that remote gets only go to the primary owner, which guarantees consistency with that owner (this still has issues with fail over when that primary owner goes down)
# Change it so that values are only added to L1 if the value was retrieved from the primary owner. (note there is still some stuff to think about for fail over here)
# Multicast the invalidation message from the primary owner after updating the value.  This is the simplest approach (no requestors map required), but may also have some performance concerns.

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