/// <exception cref="System.IO.IOException"/>
internal static void DownloadEditsToStorage(Uri fsName, RemoteEditLog log, NNStorage
dstStorage)
{
System.Diagnostics.Debug.Assert(log.GetStartTxId() > 0 && log.GetEndTxId() > 0, "bad log: "
+ log);
string fileid = ImageServlet.GetParamStringForLog(log, dstStorage);
string finalFileName = NNStorage.GetFinalizedEditsFileName(log.GetStartTxId(), log
.GetEndTxId());
IList <FilePath> finalFiles = dstStorage.GetFiles(NNStorage.NameNodeDirType.Edits,
finalFileName);
System.Diagnostics.Debug.Assert(!finalFiles.IsEmpty(), "No checkpoint targets.");
foreach (FilePath f in finalFiles)
{
if (f.Exists() && FileUtil.CanRead(f))
{
Log.Info("Skipping download of remote edit log " + log + " since it already is stored locally at "
+ f);
return;
}
else
{
if (Log.IsDebugEnabled())
{
Log.Debug("Dest file: " + f);
}
}
}
long milliTime = Time.MonotonicNow();
string tmpFileName = NNStorage.GetTemporaryEditsFileName(log.GetStartTxId(), log.
GetEndTxId(), milliTime);
IList <FilePath> tmpFiles = dstStorage.GetFiles(NNStorage.NameNodeDirType.Edits, tmpFileName
);
GetFileClient(fsName, fileid, tmpFiles, dstStorage, false);
Log.Info("Downloaded file " + tmpFiles[0].GetName() + " size " + finalFiles[0].Length
() + " bytes.");
CheckpointFaultInjector.GetInstance().BeforeEditsRename();
foreach (Storage.StorageDirectory sd in dstStorage.DirIterable(NNStorage.NameNodeDirType
.Edits))
{
FilePath tmpFile = NNStorage.GetTemporaryEditsFile(sd, log.GetStartTxId(), log.GetEndTxId
(), milliTime);
FilePath finalizedFile = NNStorage.GetFinalizedEditsFile(sd, log.GetStartTxId(),
log.GetEndTxId());
if (Log.IsDebugEnabled())
{
Log.Debug("Renaming " + tmpFile + " to " + finalizedFile);
}
bool success = tmpFile.RenameTo(finalizedFile);
if (!success)
{
Log.Warn("Unable to rename edits file from " + tmpFile + " to " + finalizedFile);
}
}
}
private void CheckNNStorage(NNStorage storage, long imageTxId, long trashEndTxId)
{
IList <FilePath> finalizedEdits = storage.GetFiles(NNStorage.NameNodeDirType.Edits
, NNStorage.GetFinalizedEditsFileName(1, imageTxId));
NUnit.Framework.Assert.IsTrue(FileExists(finalizedEdits));
IList <FilePath> inprogressEdits = storage.GetFiles(NNStorage.NameNodeDirType.Edits
, NNStorage.GetInProgressEditsFileName(imageTxId + 1));
// For rollback case we will have an inprogress file for future transactions
NUnit.Framework.Assert.IsTrue(FileExists(inprogressEdits));
if (trashEndTxId > 0)
{
IList <FilePath> trashedEdits = storage.GetFiles(NNStorage.NameNodeDirType.Edits,
NNStorage.GetFinalizedEditsFileName(imageTxId + 1, trashEndTxId) + ".trash");
NUnit.Framework.Assert.IsTrue(FileExists(trashedEdits));
}
string imageFileName = trashEndTxId > 0 ? NNStorage.GetImageFileName(imageTxId) :
NNStorage.GetRollbackImageFileName(imageTxId);
IList <FilePath> imageFiles = storage.GetFiles(NNStorage.NameNodeDirType.Image, imageFileName
);
NUnit.Framework.Assert.IsTrue(FileExists(imageFiles));
}