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Posted to commits@quickstep.apache.org by hb...@apache.org on 2016/09/16 18:29:45 UTC
[21/29] incubator-quickstep git commit: Initial commit for
partitioned hash tables.
Initial commit for partitioned hash tables.
Project: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/commit/2eb8c9d3
Tree: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/tree/2eb8c9d3
Diff: http://git-wip-us.apache.org/repos/asf/incubator-quickstep/diff/2eb8c9d3
Branch: refs/heads/partitioned-aggregation
Commit: 2eb8c9d37bfd35871ed670d4f9dd7bc0930ac0d5
Parents: 06f3990
Author: Harshad Deshmukh <hb...@apache.org>
Authored: Mon Aug 15 12:21:19 2016 -0500
Committer: Harshad Deshmukh <hb...@apache.org>
Committed: Fri Sep 16 13:17:23 2016 -0500
----------------------------------------------------------------------
storage/AggregationOperationState.hpp | 1 +
storage/CMakeLists.txt | 11 ++
storage/PartitionedHashTablePool.hpp | 201 +++++++++++++++++++++++++++++
3 files changed, 213 insertions(+)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-quickstep/blob/2eb8c9d3/storage/AggregationOperationState.hpp
----------------------------------------------------------------------
diff --git a/storage/AggregationOperationState.hpp b/storage/AggregationOperationState.hpp
index 7956bc6..66af517 100644
--- a/storage/AggregationOperationState.hpp
+++ b/storage/AggregationOperationState.hpp
@@ -32,6 +32,7 @@
#include "storage/AggregationOperationState.pb.h"
#include "storage/HashTableBase.hpp"
#include "storage/HashTablePool.hpp"
+#include "storage/PartitionedHashTablePool.hpp"
#include "storage/StorageBlockInfo.hpp"
#include "utility/Macros.hpp"
http://git-wip-us.apache.org/repos/asf/incubator-quickstep/blob/2eb8c9d3/storage/CMakeLists.txt
----------------------------------------------------------------------
diff --git a/storage/CMakeLists.txt b/storage/CMakeLists.txt
index f05cc46..3d6e8d4 100644
--- a/storage/CMakeLists.txt
+++ b/storage/CMakeLists.txt
@@ -235,6 +235,7 @@ add_library(quickstep_storage_PackedRowStoreTupleStorageSubBlock
add_library(quickstep_storage_PackedRowStoreValueAccessor
../empty_src.cpp
PackedRowStoreValueAccessor.hpp)
+add_library(quickstep_storage_PartitionedHashTablePool ../empty_src.cpp PartitionedHashTablePool.hpp)
add_library(quickstep_storage_PreloaderThread PreloaderThread.cpp PreloaderThread.hpp)
add_library(quickstep_storage_SMAIndexSubBlock SMAIndexSubBlock.cpp SMAIndexSubBlock.hpp)
add_library(quickstep_storage_SeparateChainingHashTable ../empty_src.cpp SeparateChainingHashTable.hpp)
@@ -289,6 +290,7 @@ target_link_libraries(quickstep_storage_AggregationOperationState
quickstep_storage_HashTableFactory
quickstep_storage_HashTablePool
quickstep_storage_InsertDestination
+ quickstep_storage_PartitionedHashTablePool
quickstep_storage_StorageBlock
quickstep_storage_StorageBlockInfo
quickstep_storage_StorageManager
@@ -850,6 +852,14 @@ target_link_libraries(quickstep_storage_PackedRowStoreValueAccessor
quickstep_types_TypedValue
quickstep_utility_BitVector
quickstep_utility_Macros)
+target_link_libraries(quickstep_storage_PartitionedHashTablePool
+ glog
+ quickstep_expressions_aggregation_AggregationHandle
+ quickstep_storage_FastHashTable
+ quickstep_storage_FastHashTableFactory
+ quickstep_storage_HashTableBase
+ quickstep_utility_Macros
+ quickstep_utility_StringUtil)
target_link_libraries(quickstep_storage_PreloaderThread
glog
quickstep_catalog_CatalogDatabase
@@ -1167,6 +1177,7 @@ target_link_libraries(quickstep_storage
quickstep_storage_LinearOpenAddressingHashTable
quickstep_storage_PackedRowStoreTupleStorageSubBlock
quickstep_storage_PackedRowStoreValueAccessor
+ quickstep_storage_PartitionedHashTablePool
quickstep_storage_PreloaderThread
quickstep_storage_SMAIndexSubBlock
quickstep_storage_SeparateChainingHashTable
http://git-wip-us.apache.org/repos/asf/incubator-quickstep/blob/2eb8c9d3/storage/PartitionedHashTablePool.hpp
----------------------------------------------------------------------
diff --git a/storage/PartitionedHashTablePool.hpp b/storage/PartitionedHashTablePool.hpp
new file mode 100644
index 0000000..a71af44
--- /dev/null
+++ b/storage/PartitionedHashTablePool.hpp
@@ -0,0 +1,201 @@
+/**
+ * Copyright 2016, Quickstep Research Group, Computer Sciences Department,
+ * University of Wisconsin\u2014Madison.
+ *
+ * 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.
+ **/
+
+#ifndef QUICKSTEP_STORAGE_PARTITIONED_HASH_TABLE_POOL_HPP_
+#define QUICKSTEP_STORAGE_PARTITIONED_HASH_TABLE_POOL_HPP_
+
+#include <chrono>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include "expressions/aggregation/AggregationHandle.hpp"
+#include "storage/HashTableBase.hpp"
+#include "storage/FastHashTable.hpp"
+#include "storage/FastHashTableFactory.hpp"
+#include "utility/Macros.hpp"
+#include "utility/StringUtil.hpp"
+
+#include "glog/logging.h"
+
+namespace quickstep {
+
+class StorageManager;
+class Type;
+
+/** \addtogroup Storage
+ * @{
+ */
+
+/**
+ * @brief A pool of HashTables used for a single aggregation handle. Each
+ * HashTable represents values from a given partition, which is
+ * determined by the keys in the group by clause.
+ **/
+class PartitionedHashTablePool {
+ public:
+ /**
+ * @brief Constructor.
+ *
+ * @param estimated_num_entries The maximum number of entries in a hash table.
+ * @param num_partitions The number of partitions (i.e. number of HashTables)
+ * @param hash_table_impl_type The type of hash table implementation.
+ * @param group_by_types A vector of pointer of types which form the group by
+ * key.
+ * @param agg_handle The aggregation handle.
+ * @param storage_manager A pointer to the storage manager.
+ *
+ * @note The estimate of number of entries is quite inaccurate at this time.
+ * If we go by the current estimate, each hash table demands much
+ * larger space than it actually needs, which causes the system to
+ * either trigger evictions or worse - run out of memory. To fix this
+ * issue, we divide the estimate by 100. The division will not affect
+ * correctness, however it may allocate some hash tables smaller space
+ * than their requirement, causing them to be resized during build
+ * phase, which has a performance penalty.
+ **/
+ PartitionedHashTablePool(const std::size_t estimated_num_entries,
+ const std::size_t num_partitions,
+ const HashTableImplType hash_table_impl_type,
+ const std::vector<const Type *> &group_by_types,
+ AggregationHandle *agg_handle,
+ StorageManager *storage_manager)
+ : estimated_num_entries_(
+ reduceEstimatedCardinality(estimated_num_entries, num_partitions)),
+ num_partitions_(num_partitions),
+ hash_table_impl_type_(hash_table_impl_type),
+ group_by_types_(group_by_types),
+ agg_handle_(DCHECK_NOTNULL(agg_handle)),
+ storage_manager_(DCHECK_NOTNULL(storage_manager)) {
+ initializeAllHashTables();
+ }
+
+ PartitionedHashTablePool(const std::size_t estimated_num_entries,
+ const std::size_t num_partitions,
+ const HashTableImplType hash_table_impl_type,
+ const std::vector<const Type *> &group_by_types,
+ const std::vector<std::size_t> &payload_sizes,
+ const std::vector<AggregationHandle *> &handles,
+ StorageManager *storage_manager)
+ : estimated_num_entries_(
+ reduceEstimatedCardinality(estimated_num_entries, num_partitions)),
+ num_partitions_(num_partitions),
+ hash_table_impl_type_(hash_table_impl_type),
+ group_by_types_(group_by_types),
+ payload_sizes_(payload_sizes),
+ handles_(handles),
+ storage_manager_(DCHECK_NOTNULL(storage_manager)) {
+ initializeAllHashTables();
+ }
+
+ /**
+ * @brief Check out a hash table for insertion.
+ *
+ * @param partition_id The ID of the partitioned HashTable.
+ *
+ * @return A hash table pointer for the given HashTable.
+ **/
+ AggregationStateHashTableBase* getHashTable(const std::size_t partition_id) {
+ DCHECK_LT(partition_id, num_partitions_);
+ DCHECK_LT(partition_id, hash_tables_.size());
+ return hash_tables_[partition_id].get();
+ }
+
+ /**
+ * @brief Check out a hash table for insertion.
+ *
+ * @param partition_id The ID of the partitioned HashTable.
+ *
+ * @return A hash table pointer for the given HashTable.
+ **/
+ AggregationStateHashTableBase* getHashTableFast(const std::size_t partition_id) {
+ DCHECK_LT(partition_id, num_partitions_);
+ DCHECK_LT(partition_id, hash_tables_.size());
+ return hash_tables_[partition_id].get();
+ }
+
+ /**
+ * @brief Get all the hash tables from the pool.
+ *
+ * @warning The caller should ensure that this call is made when no hash table
+ * is being checked in or checked out from the pool. In other words
+ * the hash table pool is in read-only state.
+ *
+ * @param All the hash tables in the pool.
+ *
+ **/
+ std::vector<std::unique_ptr<AggregationStateHashTableBase>>*
+ getAllHashTables() {
+ return &hash_tables_;
+ }
+
+ private:
+ void initializeAllHashTables() {
+ for (std::size_t part_num = 0; part_num < num_partitions_; ++part_num) {
+ AggregationStateHashTableBase *part_hash_table = createNewHashTableFast();
+ hash_tables_.push_back(
+ std::unique_ptr<AggregationStateHashTableBase>(part_hash_table));
+ }
+ }
+
+ AggregationStateHashTableBase* createNewHashTable() {
+ return agg_handle_->createGroupByHashTable(hash_table_impl_type_,
+ group_by_types_,
+ estimated_num_entries_,
+ storage_manager_);
+ }
+
+ AggregationStateHashTableBase* createNewHashTableFast() {
+ return AggregationStateFastHashTableFactory::CreateResizable(
+ hash_table_impl_type_,
+ group_by_types_,
+ estimated_num_entries_,
+ payload_sizes_,
+ handles_,
+ storage_manager_);
+ }
+
+ inline std::size_t reduceEstimatedCardinality(
+ const std::size_t original_estimate,
+ const std::size_t num_partitions) const {
+ CHECK_NE(num_partitions, 0u);
+ return original_estimate / num_partitions;
+ }
+
+ std::vector<std::unique_ptr<AggregationStateHashTableBase>> hash_tables_;
+
+ const std::size_t estimated_num_entries_;
+ const std::size_t num_partitions_;
+
+ const HashTableImplType hash_table_impl_type_;
+
+ const std::vector<const Type *> group_by_types_;
+
+ std::vector<std::size_t> payload_sizes_;
+
+ AggregationHandle *agg_handle_;
+ const std::vector<AggregationHandle *> handles_;
+ StorageManager *storage_manager_;
+
+ DISALLOW_COPY_AND_ASSIGN(PartitionedHashTablePool);
+};
+
+/** @} */
+
+} // namespace quickstep
+
+#endif // QUICKSTEP_STORAGE_HASH_TABLE_POOL_HPP_