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HDFS-11130. Block Storage : Add storage client to server protocol. Contributed by Chen Lian

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Anu Engineer 2016-11-14 12:27:38 -08:00 committed by Owen O'Malley
parent 3d83ee25c5
commit 2b8b3754f6
1 changed files with 76 additions and 0 deletions
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hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto Normal file
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* These .proto interfaces are private and unstable.
* Please see http://wiki.apache.org/hadoop/Compatibility
* for what changes are allowed for a *unstable* .proto interface.
*/
option java_package = "org.apache.hadoop.cblock.protocol.proto";
option java_outer_classname = "CBlockClientServerProtocolProtos";
option java_generic_services = true;
option java_generate_equals_and_hash = true;
package hadoop.cblock;
/**
* This message is sent from CBlock client side to CBlock server to
* mount a volume specified by owner name and volume name.
*
* Right now, this is the only communication between client and server.
* After the volume is mounted, CBlock client will talk to containers
* by itself, nothing to do with CBlock server.
*/
message MountVolumeRequestProto {
required string userName = 1;
required string volumeName = 2;
}
/**
* This message is sent from CBlock server to CBlock client as response
* of mount a volume. It checks the whether the volume is valid to access
* at all.(e.g. volume exist)
*
* And include enough information (volume size, block size, list of
* containers for this volume) for client side to perform read/write on
* the volume.
*/
message MountVolumeResponseProto {
required bool isValid = 1;
optional string userName = 2;
optional string volumeName = 3;
optional uint64 volumeSize = 4;
optional uint32 blockSize = 5;
repeated ContainerIDProto allContainerIDs = 6;
}
/**
* This message include ID of container which can be used to locate the
* container. Since the order of containers needs to be maintained, also
* includes a index field to verify the correctness of the order.
*/
message ContainerIDProto {
required string containerID = 1;
required uint64 index = 2;
}
service CBlockClientServerProtocolService {
/**
* mount the volume.
*/
rpc mountVolume(MountVolumeRequestProto) returns (MountVolumeResponseProto);
}