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18 package org.apache.hadoop.hbase.master.balancer;
19
20 import java.util.List;
21 import java.util.Map;
22
23 import org.apache.commons.logging.Log;
24 import org.apache.commons.logging.LogFactory;
25 import org.apache.hadoop.conf.Configuration;
26 import org.apache.hadoop.hbase.HBaseConfiguration;
27 import org.apache.hadoop.hbase.HRegionInfo;
28 import org.apache.hadoop.hbase.testclassification.MediumTests;
29 import org.apache.hadoop.hbase.ServerName;
30 import org.apache.hadoop.hbase.master.LoadBalancer;
31 import org.apache.hadoop.hbase.master.RegionPlan;
32 import org.junit.BeforeClass;
33 import org.junit.Test;
34 import org.junit.experimental.categories.Category;
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38
39 @Category(MediumTests.class)
40 public class TestDefaultLoadBalancer extends BalancerTestBase {
41 private static final Log LOG = LogFactory.getLog(TestDefaultLoadBalancer.class);
42
43 private static LoadBalancer loadBalancer;
44
45 @BeforeClass
46 public static void beforeAllTests() throws Exception {
47 Configuration conf = HBaseConfiguration.create();
48 conf.set("hbase.regions.slop", "0");
49 loadBalancer = new SimpleLoadBalancer();
50 loadBalancer.setConf(conf);
51 }
52
53
54 int[][] clusterStateMocks = new int[][] {
55
56 new int[] { 0 },
57 new int[] { 1 },
58 new int[] { 10 },
59
60 new int[] { 0, 0 },
61 new int[] { 2, 0 },
62 new int[] { 2, 1 },
63 new int[] { 2, 2 },
64 new int[] { 2, 3 },
65 new int[] { 2, 4 },
66 new int[] { 1, 1 },
67 new int[] { 0, 1 },
68 new int[] { 10, 1 },
69 new int[] { 14, 1432 },
70 new int[] { 47, 53 },
71
72 new int[] { 0, 1, 2 },
73 new int[] { 1, 2, 3 },
74 new int[] { 0, 2, 2 },
75 new int[] { 0, 3, 0 },
76 new int[] { 0, 4, 0 },
77 new int[] { 20, 20, 0 },
78
79 new int[] { 0, 1, 2, 3 },
80 new int[] { 4, 0, 0, 0 },
81 new int[] { 5, 0, 0, 0 },
82 new int[] { 6, 6, 0, 0 },
83 new int[] { 6, 2, 0, 0 },
84 new int[] { 6, 1, 0, 0 },
85 new int[] { 6, 0, 0, 0 },
86 new int[] { 4, 4, 4, 7 },
87 new int[] { 4, 4, 4, 8 },
88 new int[] { 0, 0, 0, 7 },
89
90 new int[] { 1, 1, 1, 1, 4 },
91
92 new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
93 new int[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 10 }, new int[] { 6, 6, 5, 6, 6, 6, 6, 6, 6, 1 },
94 new int[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 54 }, new int[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 55 },
95 new int[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 56 }, new int[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 16 },
96 new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 8 }, new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 9 },
97 new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 10 }, new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 123 },
98 new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 155 },
99 new int[] { 0, 0, 144, 1, 1, 1, 1, 1123, 133, 138, 12, 1444 },
100 new int[] { 0, 0, 144, 1, 0, 4, 1, 1123, 133, 138, 12, 1444 },
101 new int[] { 1538, 1392, 1561, 1557, 1535, 1553, 1385, 1542, 1619 } };
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111 @Test
112 public void testBalanceCluster() throws Exception {
113
114 for (int[] mockCluster : clusterStateMocks) {
115 Map<ServerName, List<HRegionInfo>> servers = mockClusterServers(mockCluster);
116 List<ServerAndLoad> list = convertToList(servers);
117 LOG.info("Mock Cluster : " + printMock(list) + " " + printStats(list));
118 List<RegionPlan> plans = loadBalancer.balanceCluster(servers);
119 List<ServerAndLoad> balancedCluster = reconcile(list, plans, servers);
120 LOG.info("Mock Balance : " + printMock(balancedCluster));
121 assertClusterAsBalanced(balancedCluster);
122 for (Map.Entry<ServerName, List<HRegionInfo>> entry : servers.entrySet()) {
123 returnRegions(entry.getValue());
124 returnServer(entry.getKey());
125 }
126 }
127
128 }
129
130 }