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HDFS-4083. Protocol changes for snapshots. Contributed by Suresh Srinivas.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1400316 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas 2012-10-19 22:15:27 +00:00
parent ecffab63af
commit f5c4defcb3
7 changed files with 140 additions and 2 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.HDFS-2802.txt
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@ -8,4 +8,4 @@ Branch-2802 Snapshot (Unreleased)
HDFS-4086. Add editlog opcodes to allow and disallow snapshots on a
directory. (Brandon Li via suresh)
HDFS-4083. Protocol changes for snapshots. (suresh)

16
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/ClientProtocol.java
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@ -949,4 +949,20 @@ public void cancelDelegationToken(Token<DelegationTokenIdentifier> token)
* @throws IOException
*/
public DataEncryptionKey getDataEncryptionKey() throws IOException;
/**
* Create a snapshot
* @param snapshotName name of the snapshot created
* @param snapshotRoot the path that is being snapshotted
*/
public void createSnapshot(String snapshotName, String snapshotRoot)
throws IOException;
/**
* Delete a snapshot
* @param snapshotName name of the snapshot to be deleted
* @param snapshotRoot the path where the snapshot exists
*/
public void deleteSnapshot(String snapshotName, String snapshotRoot)
throws IOException;
}

42
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/ClientNamenodeProtocolServerSideTranslatorPB.java
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@ -46,10 +46,14 @@
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ConcatResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSnapshotRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSnapshotResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSymlinkRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSymlinkResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteSnapshotRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteSnapshotResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FinalizeUpgradeRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FinalizeUpgradeResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FsyncRequestProto;
@ -83,6 +87,8 @@
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetServerDefaultsResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListCorruptFileBlocksRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListCorruptFileBlocksResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListSnapshotsRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListSnapshotsResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.MetaSaveRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.MetaSaveResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.MkdirsRequestProto;
@ -147,6 +153,11 @@
public class ClientNamenodeProtocolServerSideTranslatorPB implements
ClientNamenodeProtocolPB {
final private ClientProtocol server;
static final DeleteSnapshotResponseProto VOID_DELETE_SNAPSHOT_RESPONSE =
DeleteSnapshotResponseProto.newBuilder().build();
static final CreateSnapshotResponseProto VOID_CREATE_SNAPSHOT_RESPONSE =
CreateSnapshotResponseProto.newBuilder().build();
/**
* Constructor
@ -842,4 +853,35 @@ public GetDataEncryptionKeyResponseProto getDataEncryptionKey(
throw new ServiceException(e);
}
}
@Override
public CreateSnapshotResponseProto createSnapshot(RpcController controller,
CreateSnapshotRequestProto request) throws ServiceException {
try {
server.createSnapshot(request.getSnapshotName(),
request.getSnapshotRoot());
} catch (IOException e) {
throw new ServiceException(e);
}
return VOID_CREATE_SNAPSHOT_RESPONSE;
}
@Override
public DeleteSnapshotResponseProto deleteSnapshot(RpcController controller,
DeleteSnapshotRequestProto request) throws ServiceException {
try {
server.deleteSnapshot(request.getSnapshotName(),
request.getSnapshotRoot());
} catch (IOException e) {
throw new ServiceException(e);
}
return VOID_DELETE_SNAPSHOT_RESPONSE;
}
@Override
public ListSnapshotsResponseProto listSnapshots(RpcController controller,
ListSnapshotsRequestProto request) throws ServiceException {
// TODO Auto-generated method stub
return null;
}
}

26
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/ClientNamenodeProtocolTranslatorPB.java
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@ -55,8 +55,10 @@
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CompleteRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ConcatRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSnapshotRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSymlinkRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteSnapshotRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FinalizeUpgradeRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FsyncRequestProto;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetAdditionalDatanodeRequestProto;
@ -828,4 +830,28 @@ public Object getUnderlyingProxyObject() {
return rpcProxy;
}
@Override
public void createSnapshot(String snapshotName, String snapshotRoot)
throws IOException {
CreateSnapshotRequestProto req = CreateSnapshotRequestProto.newBuilder()
.setSnapshotName(snapshotName).setSnapshotRoot(snapshotRoot).build();
try {
rpcProxy.createSnapshot(null, req);
} catch (ServiceException e) {
throw ProtobufHelper.getRemoteException(e);
}
}
@Override
public void deleteSnapshot(String snapshotName, String snapshotRoot)
throws IOException {
DeleteSnapshotRequestProto req = DeleteSnapshotRequestProto.newBuilder()
.setSnapshotName(snapshotName).setSnapshotRoot(snapshotRoot).build();
try {
rpcProxy.deleteSnapshot(null, req);
} catch (ServiceException e) {
throw ProtobufHelper.getRemoteException(e);
}
}
}

12
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java
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@ -1072,4 +1072,16 @@ private static String getClientMachine() {
public DataEncryptionKey getDataEncryptionKey() throws IOException {
return namesystem.getBlockManager().generateDataEncryptionKey();
}
@Override
public void createSnapshot(String snapshotName, String snapshotRoot)
throws IOException {
// TODO Auto-generated method stub
}
@Override
public void deleteSnapshot(String snapshotName, String snapshotRoot)
throws IOException {
// TODO Auto-generated method stub
}
}

30
hadoop-hdfs-project/hadoop-hdfs/src/main/proto/ClientNamenodeProtocol.proto
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@ -442,6 +442,30 @@ message GetDataEncryptionKeyResponseProto {
required DataEncryptionKeyProto dataEncryptionKey = 1;
}
message CreateSnapshotRequestProto {
required string snapshotName = 1;
required string snapshotRoot = 2;
}
message CreateSnapshotResponseProto { // void response
}
message DeleteSnapshotRequestProto {
required string snapshotName = 1;
required string snapshotRoot = 2;
}
message DeleteSnapshotResponseProto { // void response
}
message ListSnapshotsRequestProto {
required string snapshotRoot = 1;
}
message ListSnapshotsResponseProto {
repeated SnapshotInfoProto snapshots = 1;
}
service ClientNamenodeProtocol {
rpc getBlockLocations(GetBlockLocationsRequestProto)
returns(GetBlockLocationsResponseProto);
@ -515,4 +539,10 @@ service ClientNamenodeProtocol {
returns(SetBalancerBandwidthResponseProto);
rpc getDataEncryptionKey(GetDataEncryptionKeyRequestProto)
returns(GetDataEncryptionKeyResponseProto);
rpc createSnapshot(CreateSnapshotRequestProto)
returns(CreateSnapshotResponseProto);
rpc deleteSnapshot(DeleteSnapshotRequestProto)
returns(DeleteSnapshotResponseProto);
rpc listSnapshots(ListSnapshotsRequestProto)
returns(ListSnapshotsResponseProto);
}

12
hadoop-hdfs-project/hadoop-hdfs/src/main/proto/hdfs.proto
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@ -375,3 +375,15 @@ message VersionResponseProto {
required NamespaceInfoProto info = 1;
}
/**
* Information related to a snapshot
* TODO: add more information
*/
message SnapshotInfoProto {
required string snapshotName = 1;
required FsPermissionProto permission = 2;
required string owner = 3;
required string group = 4;
// TODO: do we need access time?
}