public virtual void TestChooseMoreTargetsThanNodeGroups()
{
for (int i = 0; i < NumOfDatanodes; i++)
{
cluster.Remove(dataNodes[i]);
}
for (int i_1 = 0; i_1 < NumOfDatanodesBoundary; i_1++)
{
DatanodeDescriptor node = dataNodesInBoundaryCase[i_1];
if (cluster.Contains(node))
{
cluster.Remove(node);
}
}
for (int i_2 = 0; i_2 < NumOfDatanodesMoreTargets; i_2++)
{
cluster.Add(dataNodesInMoreTargetsCase[i_2]);
}
for (int i_3 = 0; i_3 < NumOfDatanodesMoreTargets; i_3++)
{
UpdateHeartbeatWithUsage(dataNodesInMoreTargetsCase[i_3], 2 * HdfsConstants.MinBlocksForWrite
* BlockSize, 0L, 2 * HdfsConstants.MinBlocksForWrite * BlockSize, 0L, 0L, 0L, 0
, 0);
}
DatanodeStorageInfo[] targets;
// Test normal case -- 3 replicas
targets = ChooseTarget(3, dataNodesInMoreTargetsCase[0]);
NUnit.Framework.Assert.AreEqual(targets.Length, 3);
NUnit.Framework.Assert.IsTrue(CheckTargetsOnDifferentNodeGroup(targets));
// Test special case -- replica number over node groups.
targets = ChooseTarget(10, dataNodesInMoreTargetsCase[0]);
NUnit.Framework.Assert.IsTrue(CheckTargetsOnDifferentNodeGroup(targets));
// Verify it only can find 6 targets for placing replicas.
NUnit.Framework.Assert.AreEqual(targets.Length, 6);
}