/// <summary>Load the fsimage from a temp file</summary>
/// <exception cref="System.IO.IOException"/>
private void LoadFSImageFromTempFile(FilePath imageFile)
{
FSImageFormat.LoaderDelegator loader = FSImageFormat.NewLoader(conf, fsn);
fsn.WriteLock();
fsn.GetFSDirectory().WriteLock();
try
{
loader.Load(imageFile, false);
FSImage.UpdateCountForQuota(fsn.GetBlockManager().GetStoragePolicySuite(), INodeDirectory
.ValueOf(fsn.GetFSDirectory().GetINode("/"), "/"));
}
finally
{
fsn.GetFSDirectory().WriteUnlock();
fsn.WriteUnlock();
}
}
/// <summary>Apply the batch of edits to the local namespace.</summary>
/// <exception cref="System.IO.IOException"/>
private void ApplyEdits(long firstTxId, int numTxns, byte[] data)
{
lock (this)
{
Preconditions.CheckArgument(firstTxId == lastAppliedTxId + 1, "Received txn batch starting at %s but expected %s"
, firstTxId, lastAppliedTxId + 1);
System.Diagnostics.Debug.Assert(backupInputStream.Length() == 0, "backup input stream is not empty"
);
try
{
if (Log.IsTraceEnabled())
{
Log.Debug("data:" + StringUtils.ByteToHexString(data));
}
FSEditLogLoader logLoader = new FSEditLogLoader(GetNamesystem(), lastAppliedTxId);
int logVersion = storage.GetLayoutVersion();
backupInputStream.SetBytes(data, logVersion);
long numTxnsAdvanced = logLoader.LoadEditRecords(backupInputStream, true, lastAppliedTxId
+ 1, null, null);
if (numTxnsAdvanced != numTxns)
{
throw new IOException("Batch of txns starting at txnid " + firstTxId + " was supposed to contain "
+ numTxns + " transactions, but we were only able to advance by " + numTxnsAdvanced
);
}
lastAppliedTxId = logLoader.GetLastAppliedTxId();
FSImage.UpdateCountForQuota(GetNamesystem().dir.GetBlockStoragePolicySuite(), GetNamesystem
().dir.rootDir);
}
finally
{
// inefficient!
backupInputStream.Clear();
}
}
}