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https://issues.apache.org/jira/browse/CASSANDRA-17110?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benedict Elliott Smith updated CASSANDRA-17110:
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Summary: CEP-15: (Accord) Transaction outcomes must be replicated to an
optimal number of replicas (was: CEP-15 (Accord): Transaction outcomes must be
replicated to an optimal number of replicas)
> CEP-15: (Accord) Transaction outcomes must be replicated to an optimal number
> of replicas
> -----------------------------------------------------------------------------------------
>
> Key: CASSANDRA-17110
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17110
> Project: Cassandra
> Issue Type: Sub-task
> Components: Accord
> Reporter: Benedict Elliott Smith
> Priority: Normal
>
> Transaction outcomes that are defined by the transaction should not be
> replicated, and outcomes that are computed from existing records (and as such
> were not replicated as part of the original transaction) should only be
> replicated to a single primary shard. This complicates execution, however,
> without MVCC as the shards from which we had to read the original value
> cannot delete their state until they know the updated value is replicated
> durably. One simple option here might be to replicate any new values only to
> those shards on whom the value's computation depended, so that any shard that
> receives this new value is safely able to report what the outcome of the
> transaction is (but is unable to participate in a recomputation of that part
> of the transaction).
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