pkumarsinha commented on a change in pull request #951: HIVE-22997 : Copy
external table to target during Repl Dump operation
URL: https://github.com/apache/hive/pull/951#discussion_r395606610
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File path: ql/src/java/org/apache/hadoop/hive/ql/exec/repl/ReplDumpTask.java
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@@ -662,15 +696,37 @@ void dumpTable(String dbName, String tblName, String
validTxnList, Path dbRoot,
replLogger.tableLog(tblName, tableSpec.tableHandle.getTableType());
if (tableSpec.tableHandle.getTableType().equals(TableType.EXTERNAL_TABLE)
|| Utils.shouldDumpMetaDataOnly(conf)) {
- return;
+ return Collections.EMPTY_LIST;
}
- for (ReplPathMapping replPathMapping: replPathMappings) {
- Task<?> copyTask = ReplCopyTask.getLoadCopyTask(
- tuple.replicationSpec, replPathMapping.getSrcPath(),
replPathMapping.getTargetPath(), conf, false);
- this.addDependentTask(copyTask);
- LOG.info("Scheduled a repl copy task from [{}] to [{}]",
- replPathMapping.getSrcPath(), replPathMapping.getTargetPath());
+ return replPathMappings;
+ }
+
+ private void intitiateDataCopyTasks() throws SemanticException {
+ Iterator<ExternalTableCopyTaskBuilder.DirCopyWork> extCopyWorkItr =
work.getDirCopyIterator();
+ List<Task<?>> childTasks = new ArrayList<>();
+ int maxTasks =
conf.getIntVar(HiveConf.ConfVars.REPL_APPROX_MAX_LOAD_TASKS);
+ TaskTracker taskTracker = new TaskTracker(maxTasks);
+ while (taskTracker.canAddMoreTasks() && hasMoreCopyWork()) {
+ if (work.replPathIteratorInitialized() && extCopyWorkItr.hasNext()) {
+ childTasks.addAll(new ExternalTableCopyTaskBuilder(work,
conf).tasks(taskTracker));
+ } else {
+ childTasks.addAll(ReplPathMapping.tasks(work, taskTracker, conf));
Review comment:
ReplPathMapping.tasks() is sort of util method. Ideally there should be a
builder class like we have for dirCopyTasks: ExternalTableCopyTaskBuilder.
In this case full fledged builder wasn't required. I can add a new Builder
class for the same.
May be, we can shift it to ReplCopyTask as a static method as ultimately it
is giving back ReplCopyTasks.
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