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From hbdeshmukh <...@git.apache.org>
Subject [GitHub] incubator-quickstep pull request #64: Introduced Shiftboss for the distribut...
Date Tue, 26 Jul 2016 21:12:44 GMT
Github user hbdeshmukh commented on a diff in the pull request:

    https://github.com/apache/incubator-quickstep/pull/64#discussion_r72338372
  
    --- Diff: query_execution/Shiftboss.cpp ---
    @@ -0,0 +1,357 @@
    +/**
    + *   Licensed 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.
    + **/
    +
    +#include "query_execution/Shiftboss.hpp"
    +
    +#include <cstddef>
    +#include <cstdlib>
    +#include <memory>
    +#include <string>
    +#include <unordered_map>
    +#include <utility>
    +#include <vector>
    +
    +#include "catalog/CatalogTypedefs.hpp"
    +#include "query_execution/QueryContext.hpp"
    +#include "query_execution/QueryExecutionMessages.pb.h"
    +#include "query_execution/QueryExecutionTypedefs.hpp"
    +#include "query_execution/QueryExecutionUtil.hpp"
    +#include "query_execution/WorkerMessage.hpp"
    +#include "relational_operators/RebuildWorkOrder.hpp"
    +#include "relational_operators/WorkOrderFactory.hpp"
    +#include "storage/InsertDestination.hpp"
    +#include "storage/StorageBlock.hpp"
    +#include "storage/StorageBlockInfo.hpp"
    +#include "storage/StorageManager.hpp"
    +#include "threading/ThreadUtil.hpp"
    +
    +#include "glog/logging.h"
    +
    +#include "tmb/address.h"
    +#include "tmb/id_typedefs.h"
    +#include "tmb/message_bus.h"
    +#include "tmb/message_style.h"
    +#include "tmb/tagged_message.h"
    +
    +using std::free;
    +using std::malloc;
    +using std::move;
    +using std::size_t;
    +using std::string;
    +using std::unique_ptr;
    +using std::vector;
    +
    +using tmb::TaggedMessage;
    +
    +namespace quickstep {
    +
    +class WorkOrder;
    +
    +void Shiftboss::run() {
    +  if (cpu_id_ >= 0) {
    +    // We can pin the shiftboss thread to a CPU if specified.
    +    ThreadUtil::BindToCPU(cpu_id_);
    +  }
    +
    +  for (;;) {
    +    // Receive() is a blocking call, causing this thread to sleep until next
    +    // message is received.
    +    AnnotatedMessage annotated_message(bus_->Receive(shiftboss_client_id_, 0, true));
    +    LOG(INFO) << "Shiftboss (id '" << shiftboss_client_id_
    +              << "') received the typed '" << annotated_message.tagged_message.message_type()
    +              << "' message from client " << annotated_message.sender;
    +    switch (annotated_message.tagged_message.message_type()) {
    +      case kShiftbossRegistrationResponseMessage: {
    +        foreman_client_id_ = annotated_message.sender;
    +        break;
    +      }
    +      case kShiftbossInitiateMessage: {
    +        const TaggedMessage &tagged_message = annotated_message.tagged_message;
    +
    +        serialization::ShiftbossInitiateMessage proto;
    +        CHECK(proto.ParseFromArray(tagged_message.message(), tagged_message.message_bytes()));
    +
    +        processShiftbossInitiateMessage(proto.query_id(), proto.catalog_database_cache(),
proto.query_context());
    +        break;
    +      }
    +      case kWorkOrderMessage: {
    +        const TaggedMessage &tagged_message = annotated_message.tagged_message;
    +
    +        serialization::WorkOrderMessage proto;
    +        CHECK(proto.ParseFromArray(tagged_message.message(), tagged_message.message_bytes()));
    +
    +        const std::size_t query_id = proto.query_id();
    +        DCHECK_EQ(1u, query_contexts_.count(query_id));
    +
    +        WorkOrder *work_order = WorkOrderFactory::ReconstructFromProto(proto.work_order(),
    +                                                                       &database_cache_,
    +                                                                       query_contexts_[query_id].get(),
    +                                                                       storage_manager_,
    +                                                                       shiftboss_client_id_,
    +                                                                       bus_);
    +
    +        unique_ptr<WorkerMessage> worker_message(
    +            WorkerMessage::WorkOrderMessage(work_order, proto.operator_index()));
    +
    +        TaggedMessage worker_tagged_message(worker_message.get(),
    +                                            sizeof(*worker_message),
    +                                            kWorkOrderMessage);
    +
    +        const size_t worker_index = getSchedulableWorker();
    +        LOG(INFO) << "Shiftboss (id '" << shiftboss_client_id_
    +                  << "') forwarded WorkOrderMessage (typed '" << kWorkOrderMessage
    +                  << "') from Foreman to worker " << worker_index;
    +
    +        QueryExecutionUtil::SendTMBMessage(bus_,
    +                                           shiftboss_client_id_,
    +                                           workers_->getClientID(worker_index),
    +                                           move(worker_tagged_message));
    +        break;
    +      }
    +      case kInitiateRebuildMessage: {
    +        const TaggedMessage &tagged_message = annotated_message.tagged_message;
    +
    +        serialization::InitiateRebuildMessage proto;
    +        CHECK(proto.ParseFromArray(tagged_message.message(), tagged_message.message_bytes()));
    +
    +        processInitiateRebuildMessage(proto.query_id(),
    +                                      proto.operator_index(),
    +                                      proto.insert_destination_index(),
    +                                      proto.relation_id());
    +        break;
    +      }
    +      case kWorkOrderCompleteMessage:  // Fall through.
    +      case kRebuildWorkOrderCompleteMessage:
    +      case kDataPipelineMessage:
    +      case kWorkOrdersAvailableMessage:
    +      case kWorkOrderFeedbackMessage: {
    +        LOG(INFO) << "Shiftboss (id '" << shiftboss_client_id_
    +                  << "') forwarded typed '" << annotated_message.tagged_message.message_type()
    +                  << "' message from worker (client " << annotated_message.sender
<< ") to Foreman";
    +
    +        DCHECK_NE(foreman_client_id_, tmb::kClientIdNone);
    +        QueryExecutionUtil::SendTMBMessage(bus_,
    +                                           shiftboss_client_id_,
    +                                           foreman_client_id_,
    +                                           move(annotated_message.tagged_message));
    +        break;
    +      }
    +      case kQueryResultRelationMessage: {
    +        const TaggedMessage &tagged_message = annotated_message.tagged_message;
    +
    +        serialization::QueryResultRelationMessage proto;
    +        CHECK(proto.ParseFromArray(tagged_message.message(), tagged_message.message_bytes()));
    +
    +        for (int i = 0; i < proto.blocks_size(); ++i) {
    +          const block_id block = proto.blocks(i);
    +          storage_manager_->saveBlockOrBlob(block);
    +          if (storage_manager_->blockOrBlobIsLoaded(block)) {
    +            // NOTE(zuyu): eviction is required to avoid accesses to the query
    +            // result relation schema in CatalogDatabaseCache, for all query
    +            // optimizer execution generator unit tests and the single-process
    +            // Quickstep CLI.
    +            storage_manager_->evictBlockOrBlob(block);
    +          }
    +        }
    +
    +        serialization::QueryResultRelationResponseMessage ack_proto;
    +        ack_proto.set_relation_id(proto.relation_id());
    +
    +        const size_t ack_proto_length = ack_proto.ByteSize();
    +        char *ack_proto_bytes = static_cast<char*>(malloc(ack_proto_length));
    +        CHECK(ack_proto.SerializeToArray(ack_proto_bytes, ack_proto_length));
    +
    +        TaggedMessage ack_message(static_cast<const void*>(ack_proto_bytes),
    +                                  ack_proto_length,
    +                                  kQueryResultRelationResponseMessage);
    +        free(ack_proto_bytes);
    +
    +        LOG(INFO) << "Shiftboss (id '" << shiftboss_client_id_
    +                  << "') sent QueryResultRelationResponseMessage (typed '" <<
kQueryResultRelationResponseMessage
    +                  << ") to Foreman";
    +        QueryExecutionUtil::SendTMBMessage(bus_,
    +                                           shiftboss_client_id_,
    +                                           foreman_client_id_,
    +                                           move(ack_message));
    +        break;
    +      }
    +      case kPoisonMessage: {
    +        LOG(INFO) << "Shiftboss (id '" << shiftboss_client_id_
    +                  << "') forwarded PoisonMessage (typed '" << kPoisonMessage
    +                  << "') from Foreman to all workers";
    +
    +        tmb::MessageStyle broadcast_style;
    +        broadcast_style.Broadcast(true);
    +
    +        tmb::MessageBus::SendStatus send_status =
    +            bus_->Send(shiftboss_client_id_,
    +                       worker_addresses_,
    +                       broadcast_style,
    +                       move(annotated_message.tagged_message));
    +        DCHECK(send_status == tmb::MessageBus::SendStatus::kOK);
    +        return;
    +      }
    +      default: {
    +        LOG(FATAL) << "Unknown TMB message type";
    +      }
    +    }
    +  }
    +}
    +
    +size_t Shiftboss::getSchedulableWorker() {
    +  const size_t num_workers = workers_->getNumWorkers();
    +
    +  size_t curr_worker = start_worker_index_;
    +  for (;;) {
    +    if (workers_->getNumQueuedWorkOrders(curr_worker) < max_msgs_per_worker_) {
    +      start_worker_index_ = (curr_worker + 1) % num_workers;
    +      // TODO(zuyu): workers_->incrementNumQueuedWorkOrders(curr_worker);
    +      // But we need a WorkOrder queue first.
    +      return curr_worker;
    +    }
    +
    +    curr_worker = (curr_worker + 1) % num_workers;
    +  }
    +}
    +
    +void Shiftboss::registerWithForeman() {
    +  LOG(INFO) << "Shiftboss (id '" << shiftboss_client_id_
    +            << "') sent ShiftbossRegistrationMessage (typed '" << kShiftbossRegistrationMessage
    +            << "') to all";
    +
    +  tmb::Address all_addresses;
    +  all_addresses.All(true);
    +
    +  tmb::MessageStyle style;
    +
    +  serialization::ShiftbossRegistrationMessage proto;
    +  proto.set_work_order_capacity(getWorkOrderCapacity());
    +
    +  const size_t proto_length = proto.ByteSize();
    +  char *proto_bytes = static_cast<char*>(malloc(proto_length));
    +  CHECK(proto.SerializeToArray(proto_bytes, proto_length));
    +
    +  TaggedMessage message(static_cast<const void*>(proto_bytes),
    +                        proto_length,
    +                        kShiftbossRegistrationMessage);
    +  free(proto_bytes);
    +
    +  tmb::MessageBus::SendStatus send_status =
    +      bus_->Send(shiftboss_client_id_, all_addresses, style, move(message));
    +  DCHECK(send_status == tmb::MessageBus::SendStatus::kOK);
    +}
    +
    +void Shiftboss::processShiftbossInitiateMessage(
    +    const std::size_t query_id,
    +    const serialization::CatalogDatabase &catalog_database_cache_proto,
    +    const serialization::QueryContext &query_context_proto) {
    +  database_cache_.update(catalog_database_cache_proto);
    +
    +  unique_ptr<QueryContext> query_context(
    +      new QueryContext(query_context_proto,
    +                       database_cache_,
    +                       storage_manager_,
    +                       shiftboss_client_id_,
    +                       bus_));
    +  query_contexts_.emplace(query_id, move(query_context));
    +
    +  LOG(INFO) << "Shiftboss (id '" << shiftboss_client_id_
    +            << "') sent ShiftbossInitiateResponseMessage (typed '"
    +            << kShiftbossInitiateResponseMessage << "') to Foreman";
    +
    +  serialization::ShiftbossInitiateResponseMessage proto;
    +  proto.set_query_id(query_id);
    +
    +  const size_t proto_length = proto.ByteSize();
    +  char *proto_bytes = static_cast<char*>(malloc(proto_length));
    +  CHECK(proto.SerializeToArray(proto_bytes, proto_length));
    +
    +  TaggedMessage ack_message(static_cast<const void*>(proto_bytes),
    +                            proto_length,
    +                            kShiftbossInitiateResponseMessage);
    +  free(proto_bytes);
    +
    +  QueryExecutionUtil::SendTMBMessage(bus_,
    +                                     shiftboss_client_id_,
    +                                     foreman_client_id_,
    +                                     move(ack_message));
    +}
    +
    +void Shiftboss::processInitiateRebuildMessage(const std::size_t query_id,
    +                                              const std::size_t op_index,
    +                                              const QueryContext::insert_destination_id
dest_index,
    +                                              const relation_id rel_id) {
    +  DCHECK_NE(foreman_client_id_, tmb::kClientIdNone);
    +
    +  DCHECK_EQ(1u, query_contexts_.count(query_id));
    +  InsertDestination *insert_destination = query_contexts_[query_id]->getInsertDestination(dest_index);
    +  DCHECK(insert_destination != nullptr);
    +
    +  vector<MutableBlockReference> partially_filled_block_refs;
    +  insert_destination->getPartiallyFilledBlocks(&partially_filled_block_refs);
    +
    +  LOG(INFO) << "Shiftboss (id '" << shiftboss_client_id_
    +            << "') sent InitiateRebuildResponseMessage (typed '" << kInitiateRebuildResponseMessage
    +            << "') to Foreman";
    +
    +  serialization::InitiateRebuildResponseMessage proto;
    +  proto.set_query_id(query_id);
    +  proto.set_operator_index(op_index);
    +  proto.set_num_rebuild_work_orders(partially_filled_block_refs.size());
    +
    +  const size_t proto_length = proto.ByteSize();
    +  char *proto_bytes = static_cast<char*>(malloc(proto_length));
    +  CHECK(proto.SerializeToArray(proto_bytes, proto_length));
    +
    +  TaggedMessage ack_message(static_cast<const void*>(proto_bytes),
    +                            proto_length,
    +                            kInitiateRebuildResponseMessage);
    +  free(proto_bytes);
    +
    +  QueryExecutionUtil::SendTMBMessage(bus_,
    +                                     shiftboss_client_id_,
    +                                     foreman_client_id_,
    +                                     move(ack_message));
    +
    +  for (size_t i = 0; i < partially_filled_block_refs.size(); ++i) {
    +    // NOTE(zuyu): Worker releases the memory after the execution of
    +    // RebuildWorkOrder on the Worker.
    +    WorkOrder *rebuild_work_order =
    +        new RebuildWorkOrder(query_id,
    +                             move(partially_filled_block_refs[0]),
    --- End diff --
    
    Do you mean ``partially_filled_block_refs[i]``?


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