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https://issues.apache.org/jira/browse/ORC-228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16134314#comment-16134314
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Lefty Leverenz commented on ORC-228:
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Does the new config (orc.rows.between.memory.checks) need to be documented if
it's mainly for testing?
> Make MemoryManagerImpl.ROWS_BETWEEN_CHECKS configurable
> -------------------------------------------------------
>
> Key: ORC-228
> URL: https://issues.apache.org/jira/browse/ORC-228
> Project: ORC
> Issue Type: Improvement
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Fix For: 1.5.0
>
>
> currently addedRow() looks like
> {noformat}
> public void addedRow(int rows) throws IOException {
> rowsAddedSinceCheck += rows;
> if (rowsAddedSinceCheck >= ROWS_BETWEEN_CHECKS) {
> notifyWriters();
> }
> }
> {noformat}
> it would be convenient for testing to set ROWS_BETWEEN_CHECKS to a low value
> so that we can generate multiple stripes with very little data.
> Currently the only way to do this is to create a new MemoryManager that
> overrides this method and install it via OrcFile.WriterOptions but this only
> works when you have control over creating the Writer.
> For example
> _org.apache.hadoop.hive.ql.io.orc.TestOrcRawRecordMerger.testRecordReaderNewBaseAndDelta()_
> There is no way to do this via some set of config params to make Hive query
> for example, create multiple stripes with little data.
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