/// <summary>
/// Test that capacity metrics are exported and pass
/// basic sanity tests.
/// </summary>
/// <exception cref="System.Exception"/>
public virtual void TestCapacityMetrics()
{
MetricsRecordBuilder rb = MetricsAsserts.GetMetrics(NsMetrics);
long capacityTotal = MetricsAsserts.GetLongGauge("CapacityTotal", rb);
System.Diagnostics.Debug.Assert((capacityTotal != 0));
long capacityUsed = MetricsAsserts.GetLongGauge("CapacityUsed", rb);
long capacityRemaining = MetricsAsserts.GetLongGauge("CapacityRemaining", rb);
long capacityUsedNonDFS = MetricsAsserts.GetLongGauge("CapacityUsedNonDFS", rb);
System.Diagnostics.Debug.Assert((capacityUsed + capacityRemaining + capacityUsedNonDFS
== capacityTotal));
}
public virtual void TestTransactionAndCheckpointMetrics()
{
long lastCkptTime = MetricsAsserts.GetLongGauge("LastCheckpointTime", MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("LastCheckpointTime", lastCkptTime, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("LastWrittenTransactionId", 1L, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("TransactionsSinceLastCheckpoint", 1L, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("TransactionsSinceLastLogRoll", 1L, MetricsAsserts.GetMetrics
(NsMetrics));
fs.Mkdirs(new Path(TestRootDirPath, "/tmp"));
UpdateMetrics();
MetricsAsserts.AssertGauge("LastCheckpointTime", lastCkptTime, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("LastWrittenTransactionId", 2L, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("TransactionsSinceLastCheckpoint", 2L, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("TransactionsSinceLastLogRoll", 2L, MetricsAsserts.GetMetrics
(NsMetrics));
cluster.GetNameNodeRpc().RollEditLog();
UpdateMetrics();
MetricsAsserts.AssertGauge("LastCheckpointTime", lastCkptTime, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("LastWrittenTransactionId", 4L, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("TransactionsSinceLastCheckpoint", 4L, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("TransactionsSinceLastLogRoll", 1L, MetricsAsserts.GetMetrics
(NsMetrics));
cluster.GetNameNodeRpc().SetSafeMode(HdfsConstants.SafeModeAction.SafemodeEnter,
false);
cluster.GetNameNodeRpc().SaveNamespace();
cluster.GetNameNodeRpc().SetSafeMode(HdfsConstants.SafeModeAction.SafemodeLeave,
false);
UpdateMetrics();
long newLastCkptTime = MetricsAsserts.GetLongGauge("LastCheckpointTime", MetricsAsserts.GetMetrics
(NsMetrics));
NUnit.Framework.Assert.IsTrue(lastCkptTime < newLastCkptTime);
MetricsAsserts.AssertGauge("LastWrittenTransactionId", 6L, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("TransactionsSinceLastCheckpoint", 1L, MetricsAsserts.GetMetrics
(NsMetrics));
MetricsAsserts.AssertGauge("TransactionsSinceLastLogRoll", 1L, MetricsAsserts.GetMetrics
(NsMetrics));
}
/// <summary>
/// Wait for the named gauge value from the metrics source to reach the
/// desired value.
/// </summary>
/// <remarks>
/// Wait for the named gauge value from the metrics source to reach the
/// desired value.
/// There's an initial delay then a spin cycle of sleep and poll. Because
/// all the tests use a shared FS instance, these tests are not independent;
/// that's why the initial sleep is in there.
/// </remarks>
/// <param name="source">metrics source</param>
/// <param name="name">gauge name</param>
/// <param name="expected">expected value</param>
/// <returns>the last metrics record polled</returns>
/// <exception cref="System.Exception">if something went wrong.</exception>
private MetricsRecordBuilder WaitForDnMetricValue(string source, string name, long
expected)
{
MetricsRecordBuilder rb;
long gauge;
//initial wait.
WaitForDeletion();
//lots of retries are allowed for slow systems; fast ones will still
//exit early
int retries = (DatanodeCount + 1) * WaitGaugeValueRetries;
rb = MetricsAsserts.GetMetrics(source);
gauge = MetricsAsserts.GetLongGauge(name, rb);
while (gauge != expected && (--retries > 0))
{
Sharpen.Thread.Sleep(DfsReplicationInterval * 500);
rb = MetricsAsserts.GetMetrics(source);
gauge = MetricsAsserts.GetLongGauge(name, rb);
}
//at this point the assertion is valid or the retry count ran out
MetricsAsserts.AssertGauge(name, expected, rb);
return(rb);
}