[infinispan-issues] [JBoss JIRA] (ISPN-5965) Add a new mode (READ ONLY) for Partition Handling

[Wolf-Dieter Fink (JIRA)]

Wolf-Dieter Fink created ISPN-5965:
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             Summary: Add a new mode (READ ONLY) for Partition Handling
                 Key: ISPN-5965
                 URL: https://issues.jboss.org/browse/ISPN-5965
             Project: Infinispan
          Issue Type: Feature Request
          Components: Core
            Reporter: Wolf-Dieter Fink


Without any PartitionHandling it is not possible to ensure the consistency of the cache.
With PH enabled it depends whether the remaining partition has the majority or at least all owners for a particular key to be able to access the key.

In some cases the prefered behaviour is to keep every entry readable but prevent from any change to keep consistency.
So there should be a configuration option for the partition handling to switch all instances to READ_ONLY instead of AVAILABLE/DEGRADED.
In this case each get will return the current value but each put will be rejected with a AvailabilityException

This prevents from any rebalancing if one partition contains a majority and stay available.
But in  case of a real instance crash it might need a human interaction to set the state back to AVAILABLE as the node will never come back to the cluster.



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