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https://issues.apache.org/jira/browse/HIVE-24852?focusedWorklogId=570985&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-570985
]
ASF GitHub Bot logged work on HIVE-24852:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 24/Mar/21 07:59
Start Date: 24/Mar/21 07:59
Worklog Time Spent: 10m
Work Description: aasha commented on a change in pull request #2043:
URL: https://github.com/apache/hive/pull/2043#discussion_r600246810
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/exec/repl/ReplExternalTables.java
##########
@@ -221,7 +251,66 @@ private void dirLocationToCopy(FileList fileList, Path
sourcePath, HiveConf conf
targetPath = new Path(Utils.replaceHost(targetPath.toString(),
sourcePath.toUri().getHost()));
sourcePath = new Path(Utils.replaceHost(sourcePath.toString(),
remoteNS));
}
- fileList.add(new DirCopyWork(sourcePath, targetPath).convertToString());
+ fileList.add(
+ new DirCopyWork(sourcePath, targetPath, copyMode).convertToString());
+ }
+
+ private SnapshotUtils.SnapshotCopyMode createSnapshotsAtSource(
+ Path sourcePath, String snapshotPrefix, boolean isSnapshotEnabled,
+ HiveConf conf, HashSet<String> numFailedSnapshotPaths) {
+ if (!isSnapshotEnabled) {
+ LOG.info("Snapshot copy not enabled for path {} Will use normal "
+ + "distCp for copying data.",
+ sourcePath);
+ return FALLBACK_COPY;
+ }
+ DistributedFileSystem sourceDfs = SnapshotUtils.getDFS(sourcePath, conf);
+
+ if (sourceDfs != null) {
+ try {
+ // check if second snapshot exists.
+ boolean isSecondSnapAvlb = SnapshotUtils
+ .isSnapshotAvailable(sourceDfs, sourcePath, snapshotPrefix,
+ "old");
+ if (isSecondSnapAvlb) {
+ sourceDfs.deleteSnapshot(sourcePath, snapshotPrefix + "old");
+ sourceDfs.renameSnapshot(sourcePath, snapshotPrefix + "initial",
+ snapshotPrefix + "old");
+ sourceDfs.createSnapshot(sourcePath, snapshotPrefix + "initial");
+ return DIFF_COPY;
+ } else {
+ // Check if first snapshot is available
+ boolean isFirstSnapshotAvailable = SnapshotUtils
+ .isSnapshotAvailable(sourceDfs, sourcePath, snapshotPrefix,
+ "initial");
+ if (isFirstSnapshotAvailable) {
+ sourceDfs.renameSnapshot(sourcePath, snapshotPrefix + "initial",
+ snapshotPrefix + "old");
+ sourceDfs.createSnapshot(sourcePath, snapshotPrefix + "initial");
+ return DIFF_COPY;
+ } else {
+ if (SnapshotUtils.allowSnapshot(sourceDfs, sourcePath)) {
+ ReplUtils.createSnapshotSafe(sourceDfs, sourcePath,
+ snapshotPrefix + "initial");
+ return INITIAL_COPY;
+ } else {
+ numFailedSnapshotPaths.add(sourcePath.toString());
+ LOG.error("Can not allow Snapshot for path {}", sourcePath);
+ return FALLBACK_COPY;
+ }
+ }
+ }
+ } catch (Exception e) {
+ LOG.error("Error encountered during snapshot setup for path {}",
+ sourcePath, e);
+ numFailedSnapshotPaths.add(sourcePath.toString());
+ return FALLBACK_COPY;
+ }
+ } else {
Review comment:
this else is not needed. all other paths return from the top.
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Issue Time Tracking
-------------------
Worklog Id: (was: 570985)
Time Spent: 50m (was: 40m)
> Add support for Snapshots during external table replication
> -----------------------------------------------------------
>
> Key: HIVE-24852
> URL: https://issues.apache.org/jira/browse/HIVE-24852
> Project: Hive
> Issue Type: Improvement
> Reporter: Ayush Saxena
> Assignee: Ayush Saxena
> Priority: Critical
> Labels: pull-request-available
> Attachments: Design Doc HDFS Snapshots for External Table
> Replication-01.pdf
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Add support for use of snapshot diff for external table replication.
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