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Posted to commits@cassandra.apache.org by "Benedict Elliott Smith (Jira)" <ji...@apache.org> on 2022/02/02 14:20:00 UTC

[jira] [Commented] (CASSANDRA-17096) CEP-15: (Accord) Liveness / Repair

    [ https://issues.apache.org/jira/browse/CASSANDRA-17096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17485837#comment-17485837 ] 

Benedict Elliott Smith commented on CASSANDRA-17096:
----------------------------------------------------

[PR|https://github.com/belliottsmith/accord/pull/2]

> CEP-15: (Accord) Liveness / Repair
> ----------------------------------
>
>                 Key: CASSANDRA-17096
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-17096
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Accord
>            Reporter: Benedict Elliott Smith
>            Priority: Normal
>
> Accord requires replicas apply a consistent prefix of agreed operations, and permits many operations to be in-flight and depending on each other. These both benefit from strong liveness properties to ensure the system is always able to make rapid progress. To this end, we will introduce a gossip-like mechanism for communicating knowledge about the replication status of known transactions. Nodes will frequently reconcile their knowledge of each other’s knowledge with each other, so that the status of a transaction on other nodes can be rapidly determined.



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