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https://issues.apache.org/jira/browse/HDDS-1649?focusedWorklogId=279167&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-279167
]
ASF GitHub Bot logged work on HDDS-1649:
----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Jul/19 17:15
Start Date: 18/Jul/19 17:15
Worklog Time Spent: 10m
Work Description: bharatviswa504 commented on pull request #948:
HDDS-1649. On installSnapshot notification from OM leader, download checkpoint
and reload OM state
URL: https://github.com/apache/hadoop/pull/948#discussion_r304689358
##########
File path:
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestOMRatisSnapshots.java
##########
@@ -0,0 +1,193 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
under
+ * the License.
+ */
+package org.apache.hadoop.ozone.om;
+
+import org.apache.commons.lang3.RandomStringUtils;
+import org.apache.hadoop.hdds.conf.OzoneConfiguration;
+import org.apache.hadoop.ozone.MiniOzoneCluster;
+import org.apache.hadoop.ozone.MiniOzoneHAClusterImpl;
+import org.apache.hadoop.ozone.client.ObjectStore;
+import org.apache.hadoop.ozone.client.OzoneBucket;
+import org.apache.hadoop.ozone.client.OzoneClientFactory;
+import org.apache.hadoop.ozone.client.OzoneVolume;
+import org.apache.hadoop.ozone.client.VolumeArgs;
+import org.apache.hadoop.ozone.om.helpers.OmVolumeArgs;
+import org.apache.hadoop.ozone.om.ratis.OzoneManagerRatisServer;
+import org.apache.hadoop.utils.db.DBCheckpoint;
+import org.apache.hadoop.utils.db.Table;
+import org.apache.hadoop.utils.db.TableIterator;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.rules.Timeout;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+import static org.apache.hadoop.ozone.om.TestOzoneManagerHA.createKey;
+
+/**
+ * Tests the Ratis snaphsots feature in OM.
+ */
+public class TestOMRatisSnapshots {
+
+ private MiniOzoneHAClusterImpl cluster = null;
+ private ObjectStore objectStore;
+ private OzoneConfiguration conf;
+ private String clusterId;
+ private String scmId;
+ private int numOfOMs = 3;
+ private static final long SNAPSHOT_THRESHOLD = 50;
+ private static final int LOG_PURGE_GAP = 50;
+
+ @Rule
+ public ExpectedException exception = ExpectedException.none();
+
+ @Rule
+ public Timeout timeout = new Timeout(3000_000);
+
+ /**
+ * Create a MiniDFSCluster for testing. The cluster initially has one
Review comment:
Minor: MiniOzoneCluster
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Issue Time Tracking
-------------------
Worklog Id: (was: 279167)
Time Spent: 4h 40m (was: 4.5h)
> On installSnapshot notification from OM leader, download checkpoint and
> reload OM state
> ---------------------------------------------------------------------------------------
>
> Key: HDDS-1649
> URL: https://issues.apache.org/jira/browse/HDDS-1649
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Reporter: Hanisha Koneru
> Assignee: Hanisha Koneru
> Priority: Major
> Labels: pull-request-available
> Time Spent: 4h 40m
> Remaining Estimate: 0h
>
> Installing a DB checkpoint on the OM involves following steps:
> 1. When an OM follower receives installSnapshot notification from OM leader,
> it should initiate a new checkpoint on the OM leader and download that
> checkpoint through Http.
> 2. After downloading the checkpoint, the StateMachine must be paused so that
> the old OM DB can be replaced with the new downloaded checkpoint.
> 3. The OM should be reloaded with the new state . All the services having a
> dependency on the OM DB (such as MetadataManager, KeyManager etc.) must be
> re-initialized/ restarted.
> 4. Once the OM is ready with the new state, the state machine must be
> unpaused to resume participating in the Ratis ring.
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