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Posted to notifications@accumulo.apache.org by "Mike Drob (JIRA)" <ji...@apache.org> on 2014/01/16 16:54:20 UTC
[jira] [Commented] (ACCUMULO-2205) Add compaction filter to
continuous ingest
[ https://issues.apache.org/jira/browse/ACCUMULO-2205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13873521#comment-13873521 ]
Mike Drob commented on ACCUMULO-2205:
-------------------------------------
At the risk of asking the obvious, what happens to the {{3->5}} link?
> Add compaction filter to continuous ingest
> ------------------------------------------
>
> Key: ACCUMULO-2205
> URL: https://issues.apache.org/jira/browse/ACCUMULO-2205
> Project: Accumulo
> Issue Type: Sub-task
> Reporter: Keith Turner
>
> It would be useful run a compaction that deletes all of the nodes written by a given ingest client (each ingest client writes a uuid that this filter could use). This would probably be best done after verification( or on a clone in parallel to verification). For example could do the following steps in testing.
> # run ingest for a time period
> # stop ingest
> # verify
> # run compaction filter to delete data written by one or more ingest clients
> # verify
> Its possible that ingest clients can over write each others nodes, but it seems like this would not cause a problem. Below is one example where this does not cause a problem
> # ingest client A writes 2:A->3:A->5:A->6:A->7:A
> # ingest client B writes 12:B->13:B->5:B->16:B->17:B
> # every thing written by B is deleted
> In the above case, {{2:A->3:A}} and {{6:A->7:A}} would be the only thing left. There are not pointers to undefined nodes.
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