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https://issues.apache.org/jira/browse/TRAFODION-2744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16198145#comment-16198145
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ASF GitHub Bot commented on TRAFODION-2744:
-------------------------------------------
Github user liuyu000 commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/1243#discussion_r143626661
--- Diff: docs/odb_user/src/asciidoc/_chapters/load.adoc ---
@@ -1080,24 +1080,54 @@ define the size of this buffer in two different
ways: +
| `ifempty` | Loads the target table only if empty.
| `nomark` | Don’t print the number of records loaded so far during loads.
| `soe` | Stop On Error. odb stops as soon as it encounters an error.
-| `parallel=num` | odb uses as many threads as the parallel argument to
extract data from partitioned source tables
-*PLUS* an equivalent number of threads to write to the target table. +
- +
- *Example* +
- +
-If you specify `parallel=4` and the source table is made of 32 partitions,
then odb start *four* threads
-(four ODBC connections) to read from the source table *PLUS* four threads
(four ODBC connections) to write to the target table: +
- +
-- thread 0 extracts partitions 0-7 from source +
-- thread 1 writes data extracted from thread 0 to target +
-- thread 2 extracts partitions 8-15 from source +
-- thread 3 writes data extracted from thread 2 to target +
-- thread 4 extracts partitions 16-23 from source +
-- thread 5 writes data extracted from thread 4 to target +
-- thread 6 extracts partitions 24-31 from source +
-- thread 7 writes data extracted from thread 6 to target +
- +
-*You have to specify `splitby`.*
+| `parallel=num` | odb uses two kinds of threads: +
+
+• To extract data from partitioned source table. +
+The number of the threads is as many as the parallel argument. +
+
+• To write data to the target table. +
+The number of the threads is equal to *parallel argument* * *number of
loaders*. +
+
+*Example*
+
+If you specify parallel argument = 4 and the source table is made of 32
partitions, then odb start: +
--- End diff --
Thanks Dave.
I've corrected. :)
> Correct the Descriptions and Example of *parallel=num (Copy Operators)* in
> *Trafodion ODB User Guide*
> -----------------------------------------------------------------------------------------------------
>
> Key: TRAFODION-2744
> URL: https://issues.apache.org/jira/browse/TRAFODION-2744
> Project: Apache Trafodion
> Issue Type: Documentation
> Reporter: Liu Yu
> Assignee: Liu Yu
>
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