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From "Pankaj Kumar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16509) Add option to LoadIncrementalHFiles which allows skipping unmatched column families
Date Sat, 27 Aug 2016 04:33:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15440666#comment-15440666
] 

Pankaj Kumar commented on HBASE-16509:
--------------------------------------

I meant, whether "private List<String> unmatchedFamilies" will have the unmatched column
families because in validateFamiliesInHFiles(...) it is added locally,
{noformat}
    List<String> unmatchedFamilies = new ArrayList<String>();
    Iterator<LoadQueueItem> queueIter = queue.iterator();
    while (queueIter.hasNext()) {
      LoadQueueItem lqi = queueIter.next();
      String familyNameInHFile = Bytes.toString(lqi.family);
      if (!familyNames.contains(familyNameInHFile)) {
        unmatchedFamilies.add(familyNameInHFile);
      }
    }
{noformat}



> Add option to LoadIncrementalHFiles which allows skipping unmatched column families
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-16509
>                 URL: https://issues.apache.org/jira/browse/HBASE-16509
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>         Attachments: 16509.v1.txt, 16509.v2.txt
>
>
> During my work on HBASE-15449, there came the need for LoadIncrementalHFiles not to bail
out on unmatched column families.
> The use case is like this:
> * table has two column families, A and B
> * full backup is taken on this table
> * column family B is dropped
> * more data is written to the table
> * incremental backup is performed on the table
> * user performs incremental restore using the latest backup
> Since column family B is gone, LoadIncrementalHFiles would fail with IOException for
family mismatch.
> This issue is to add an option to LoadIncrementalHFiles so that bulk load can load hfiles
for the existing column families.



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