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https://issues.apache.org/jira/browse/CASSANDRA-16619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17327149#comment-17327149
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Branimir Lambov commented on CASSANDRA-16619:
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{quote}what do we do with other things such as repair, ancestry, level, etc?
{quote}
With this ticket, we _have_ the originating host id, so we have the means to
ignore non-relevant information, whether it is in commit log, compaction or
anywhere.
There's some room to make the interface more generic, i.e. have a mechanism to
mark fields as local so that they can be properly combined when doing
compaction (which can easily be done in a separate ticket), but this IMHO is a
better solution to the problem as it handles all manners of transfer and also
allows correcting errors caused by tables already transferred by the time a bug
with local metadata is uncovered.
> Loss of commit log data possible after sstable ingest
> -----------------------------------------------------
>
> Key: CASSANDRA-16619
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16619
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Commit Log
> Reporter: Jacek Lewandowski
> Assignee: Jacek Lewandowski
> Priority: Normal
> Fix For: 3.0.x, 3.11.x, 4.0.x
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> SSTable metadata contains commit log positions of the sstable. These
> positions are used to filter out mutations from the commit log on restart and
> only make sense for the node on which the data was flushed.
> If an SSTable is moved between nodes they may cover regions that the
> receiving node has not yet flushed, and result in valid data being lost
> should these sections of the commit log need to be replayed.
> Solution:
> The chosen solution introduces a new sstable metadata (StatsMetadata) -
> originatingHostId (UUID), which is the local host id of the node on which the
> sstable was created, or null if not known. Commit log intervals from an
> sstable are taken into account during Commit Log replay only when the
> originatingHostId of the sstable matches the local node's hostId.
> For new sstables the originatingHostId is set according to StorageService's
> local hostId.
> For compacted sstables the originatingHostId set according to
> StorageService's local hostId, and only commit log intervals from local
> sstables is preserved in the resulting sstable.
> discovered by [~jakubzytka]
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