HDFS-4083. Protocol changes for snapshots. Contributed by Suresh Srinivas.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1400316 13f79535-47bb-0310-9956-ffa450edef68
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@ -8,4 +8,4 @@ Branch-2802 Snapshot (Unreleased)
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HDFS-4086. Add editlog opcodes to allow and disallow snapshots on a
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directory. (Brandon Li via suresh)
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HDFS-4083. Protocol changes for snapshots. (suresh)
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@ -949,4 +949,20 @@ public interface ClientProtocol {
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* @throws IOException
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*/
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public DataEncryptionKey getDataEncryptionKey() throws IOException;
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/**
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* Create a snapshot
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* @param snapshotName name of the snapshot created
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* @param snapshotRoot the path that is being snapshotted
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*/
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public void createSnapshot(String snapshotName, String snapshotRoot)
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throws IOException;
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/**
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* Delete a snapshot
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* @param snapshotName name of the snapshot to be deleted
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* @param snapshotRoot the path where the snapshot exists
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*/
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public void deleteSnapshot(String snapshotName, String snapshotRoot)
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throws IOException;
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}
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@ -46,10 +46,14 @@ import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.Concat
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ConcatResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSnapshotRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSnapshotResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSymlinkRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSymlinkResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteSnapshotRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteSnapshotResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FinalizeUpgradeRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FinalizeUpgradeResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FsyncRequestProto;
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@ -83,6 +87,8 @@ import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetSer
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetServerDefaultsResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListCorruptFileBlocksRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListCorruptFileBlocksResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListSnapshotsRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ListSnapshotsResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.MetaSaveRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.MetaSaveResponseProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.MkdirsRequestProto;
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@ -147,6 +153,11 @@ import com.google.protobuf.ServiceException;
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public class ClientNamenodeProtocolServerSideTranslatorPB implements
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ClientNamenodeProtocolPB {
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final private ClientProtocol server;
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static final DeleteSnapshotResponseProto VOID_DELETE_SNAPSHOT_RESPONSE =
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DeleteSnapshotResponseProto.newBuilder().build();
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static final CreateSnapshotResponseProto VOID_CREATE_SNAPSHOT_RESPONSE =
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CreateSnapshotResponseProto.newBuilder().build();
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/**
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* Constructor
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@ -842,4 +853,35 @@ public class ClientNamenodeProtocolServerSideTranslatorPB implements
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throw new ServiceException(e);
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}
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}
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@Override
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public CreateSnapshotResponseProto createSnapshot(RpcController controller,
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CreateSnapshotRequestProto request) throws ServiceException {
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try {
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server.createSnapshot(request.getSnapshotName(),
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request.getSnapshotRoot());
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} catch (IOException e) {
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throw new ServiceException(e);
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}
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return VOID_CREATE_SNAPSHOT_RESPONSE;
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}
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@Override
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public DeleteSnapshotResponseProto deleteSnapshot(RpcController controller,
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DeleteSnapshotRequestProto request) throws ServiceException {
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try {
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server.deleteSnapshot(request.getSnapshotName(),
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request.getSnapshotRoot());
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} catch (IOException e) {
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throw new ServiceException(e);
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}
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return VOID_DELETE_SNAPSHOT_RESPONSE;
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}
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@Override
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public ListSnapshotsResponseProto listSnapshots(RpcController controller,
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ListSnapshotsRequestProto request) throws ServiceException {
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// TODO Auto-generated method stub
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return null;
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}
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}
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@ -55,8 +55,10 @@ import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.Cancel
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CompleteRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ConcatRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSnapshotRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.CreateSymlinkRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.DeleteSnapshotRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FinalizeUpgradeRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.FsyncRequestProto;
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import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetAdditionalDatanodeRequestProto;
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@ -827,5 +829,29 @@ public class ClientNamenodeProtocolTranslatorPB implements
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public Object getUnderlyingProxyObject() {
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return rpcProxy;
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}
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@Override
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public void createSnapshot(String snapshotName, String snapshotRoot)
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throws IOException {
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CreateSnapshotRequestProto req = CreateSnapshotRequestProto.newBuilder()
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.setSnapshotName(snapshotName).setSnapshotRoot(snapshotRoot).build();
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try {
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rpcProxy.createSnapshot(null, req);
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} catch (ServiceException e) {
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throw ProtobufHelper.getRemoteException(e);
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}
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}
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@Override
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public void deleteSnapshot(String snapshotName, String snapshotRoot)
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throws IOException {
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DeleteSnapshotRequestProto req = DeleteSnapshotRequestProto.newBuilder()
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.setSnapshotName(snapshotName).setSnapshotRoot(snapshotRoot).build();
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try {
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rpcProxy.deleteSnapshot(null, req);
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} catch (ServiceException e) {
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throw ProtobufHelper.getRemoteException(e);
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}
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}
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}
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@ -1072,4 +1072,16 @@ class NameNodeRpcServer implements NamenodeProtocols {
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public DataEncryptionKey getDataEncryptionKey() throws IOException {
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return namesystem.getBlockManager().generateDataEncryptionKey();
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}
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@Override
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public void createSnapshot(String snapshotName, String snapshotRoot)
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throws IOException {
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// TODO Auto-generated method stub
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}
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@Override
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public void deleteSnapshot(String snapshotName, String snapshotRoot)
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throws IOException {
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// TODO Auto-generated method stub
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}
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}
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@ -442,6 +442,30 @@ message GetDataEncryptionKeyResponseProto {
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required DataEncryptionKeyProto dataEncryptionKey = 1;
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}
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message CreateSnapshotRequestProto {
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required string snapshotName = 1;
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required string snapshotRoot = 2;
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}
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message CreateSnapshotResponseProto { // void response
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}
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message DeleteSnapshotRequestProto {
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required string snapshotName = 1;
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required string snapshotRoot = 2;
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}
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message DeleteSnapshotResponseProto { // void response
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}
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message ListSnapshotsRequestProto {
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required string snapshotRoot = 1;
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}
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message ListSnapshotsResponseProto {
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repeated SnapshotInfoProto snapshots = 1;
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}
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service ClientNamenodeProtocol {
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rpc getBlockLocations(GetBlockLocationsRequestProto)
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returns(GetBlockLocationsResponseProto);
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@ -515,4 +539,10 @@ service ClientNamenodeProtocol {
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returns(SetBalancerBandwidthResponseProto);
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rpc getDataEncryptionKey(GetDataEncryptionKeyRequestProto)
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returns(GetDataEncryptionKeyResponseProto);
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rpc createSnapshot(CreateSnapshotRequestProto)
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returns(CreateSnapshotResponseProto);
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rpc deleteSnapshot(DeleteSnapshotRequestProto)
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returns(DeleteSnapshotResponseProto);
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rpc listSnapshots(ListSnapshotsRequestProto)
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returns(ListSnapshotsResponseProto);
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}
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@ -375,3 +375,15 @@ message VersionResponseProto {
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required NamespaceInfoProto info = 1;
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}
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/**
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* Information related to a snapshot
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* TODO: add more information
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*/
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message SnapshotInfoProto {
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required string snapshotName = 1;
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required FsPermissionProto permission = 2;
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required string owner = 3;
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required string group = 4;
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// TODO: do we need access time?
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}
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