[jira] [Commented] (CASSANDRA-14197) SSTable upgrade should be automatic

["Marcus Eriksson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-14197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16406068#comment-16406068 ] 

Marcus Eriksson commented on CASSANDRA-14197:
---------------------------------------------

pushed a new version here: https://github.com/krummas/cassandra/commits/marcuse/autoupgrade-v2

Idea is that if there is no other compaction to do for a table, we will pick the oldest non-upgraded sstable and upgrade it. The patch also adds old-sstable-count to {{nodetool tablestats}} and a metric so that users can know when they are fully upgraded. There will be no starvation of tables that we don't write anything to since we have [this|https://github.com/krummas/cassandra/blob/marcuse/autoupgrade-v2/src/java/org/apache/cassandra/service/CassandraDaemon.java#L408] which checks if there are compactions to do every minute. Only time we won't run an upgrade for a long time is if we are way behind on compactions, and in this case it is probably better to just let standard compactions run the upgrades until we catch up. Users can either enable this feature in cassandra.yaml or via JMX.

[~KurtG] [~aweisberg] wdyt?

> SSTable upgrade should be automatic
> -----------------------------------
>
>                 Key: CASSANDRA-14197
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14197
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Marcus Eriksson
>            Assignee: Marcus Eriksson
>            Priority: Major
>             Fix For: 4.x
>
>
> Upgradesstables should run automatically on node upgrade



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